OPERATOR’S
MANUAL
Axion / 150Z Series
18.5, 21, 24, 26HP Zero-Turn Riders
Mfg. No.
Description
7800360
7800380
7800269
7800392
7800374
7800381
7800378
7800386
7800393
7800390
7800379
7800391
7800375
7800382
7800387
7800394
Simplicity Axion Model ZT18533, 18.5HP w/ 33” Mower
Simplicity Axion Model CZT18533, 18.5HP w/ 33” Mower (California Model)
Snapper 150Z Model SC18533, 18.5HP w/ 33” Mower
Snapper 150Z Model CSC18533, 18.5HP w/ 33” Mower (California Model)
Simplicity Axion Model ZT2142, 21HP w/ 42” Mower
Simplicity Axion Model CZT2142, 21HP w/ 42” Mower (California Model)
Simplicity Axion Model ZT2142, 21HP w/ 42” Mower (Australia Model)
Snapper 150Z Model SC2142, 21HP w/ 42” Mower
Snapper 150Z Model CSC2142, 21HP w/ 42” Mower (California Model)
Snapper 150Z Model SC2142, 21HP w/ 42” Mower (Australia Model)
Simplicity Axion Model ZT2450, 24HP w/ 50” Mower (Australia Model)
Snapper 150Z Model SC2450, 24HP w/ 50” Mower (Australia Model)
Simplicity Axion Model ZT2650, 26HP w/ 50” Mower
Simplicity Axion Model CZT2650, 26HP w/ 50” Mower (California Model)
Snapper 150Z Model SC2650, 26HP w/ 50” Mower
Snapper 150Z Model CSC2650, 26HP w/ 50” Mower (California Model)
7102312
Revision ‘-’
Rev. Date 7/2008
TP 100-5409---ZT-SN
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TABLE OF CONTENTS
Safety Rules
General Operation...................................................2
Service & Adjustments
Ground Speed Control Lever Adjustment .............28
Speed Balancing Adjustment................................28
Cutting Height Adjustment ....................................28
PTO Clutch Adjustment.........................................28
Brake Adjustment..................................................29
Battery Charging...................................................29
Engine Adjustments..............................................29
Mower Deck Leveling Adjustments .......................30
Mower Belt Replacement......................................34
Transportation & Storage ........................................2
Slope Operation ......................................................3
Towed Equipment....................................................3
Children...................................................................3
Emissions................................................................3
Ignition System .......................................................3
Slope Sighting Guide ..............................................4
Service & Maintenance...........................................5
Safety & Operation Decals......................................6
Identification Numbers................................................7
Operation
Storage..................................................................35
Troubleshooting
Troubleshooting the Rider - Chart.........................36
Control Functions....................................................8
Troubleshooting the Mower - Chart.......................37
Specifications ............................................................38
Service Items .............................................................39
Lawn Care ..............................................................LC-1
General Operating Safety .......................................9
Checks before Starting..........................................10
Fuel Recommendations........................................10
Emergency Stopping.............................................11
Stopping the Rider and Engine.............................11
Starting the Engine ...............................................11
Mowing..................................................................11
Pushing the Rider by Hand ...................................11
Driving Practice.....................................................12
Mower Deck Removal & Installation......................14
Maintenance
Maintenance Schedule .........................................16
Rider Maintenance
Accessing the Engine Compartment.....................17
Clean Debris from Rider and Engine ....................17
Clean Debris from Engine Cooling Areas .............17
Check Tire Pressure..............................................17
Lubrication ............................................................18
Clean Deck & Check/Replace Mower Blades .......20
Clean the Battery & Cables...................................22
Check Rider Safety System ..................................22
Check/Adjust PTO Clutch......................................23
Engine Maintenance
Check Engine Oil Level.........................................24
Change Engine Oil................................................24
Change Engine Oil & Filter ...................................24
Service Air Filter & Pre-Cleaner............................25
Replace Spark Plug ..............................................27
NOTE: In this manual, “left” and “right” are referred to as seen from the operating position.
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SAFETY RULES
Read these safety rules and follow them closely. Failure to obey these rules could result in loss of control
of unit, severe personal injury or death to you, or bystanders, or damage to property or equipment.
This mowing deck is capable of amputating hands and feet and throwing objects.
The triangle
in text signifies important cautions or warnings which must be followed.
19. Follow the manufacturer’s recommendations for wheel
weights or counterweights.
GENERAL OPERATION
1. Read, understand, and follow all instructions in the
manual and on the unit before starting.
20. Keep in mind the operator is responsible for accidents
occurring to other people or property.
2. Do not put hands or feet near rotating parts or under
the machine. Keep clear of the discharge opening at
all times.
21. All drivers should seek and obtain professional and
practical instruction.
22. Always wear substantial footwear and trousers.
Never operate when barefoot or wearing sandals.
23. Before using, always visually check that the blades
and blade hardware are present, intact, and secure.
Replace worn or damaged parts.
24. Disengage attachments before: refueling, removing
an attachment, making adjustments (unless the
adjustment can be made from the operator’s
position).
25. When the machine is parked, stored, or left
unattended, lower the cutting means unless a positive
mechanical lock is used.
26. Before leaving the operator’s position for any reason,
engage the parking brake, disengage the blades
(PTO), stop the engine, and remove the key.
27. To reduce fire hazard, keep the unit free of grass,
leaves, & excess oil. Do not stop or park over dry
leaves, grass, or combustible materials.
28. It is a violation of California Public Resource Code
Section 4442 to use or operate the engine on or near
any forest-covered, brush-covered, or grass-covered
land unless the exhaust system is equipped with a
spark arrester meeting any applicable local or state
laws. Other states or federal areas may have similar
laws.
29. OSHA regulations may require the use of hearing
protection when exposed to sound levels greater than
85 dBA for an 8 hour time period.
3. Only allow responsible adults, who are familiar with
the instructions, to operate the unit (local regulations
can restrict operator age).
4. Clear the area of objects such as rocks, toys, wire,
etc., which could be picked up and thrown by the
blade(s).
5. Be sure the area is clear of other people before
mowing. Stop the unit if anyone enters the area.
6. Never carry passengers.
7. Do not mow in reverse unless absolutely necessary.
Always look down and behind before and while
travelling in reverse.
8. Never direct discharge material toward anyone. Avoid
discharging material against a wall or obstruction.
Material may ricochet back toward the operator. Stop
the blade(s) when crossing gravel surfaces.
9. Do not operate the machine without the entire grass
catcher, discharge guard (deflector), or other safety
devices in place and operational.
10. Slow down before turning.
11. Never leave a running unit unattended. Always
disengage the blades (PTO), set parking brake, stop
engine, and remove keys before dismounting.
12. Disengage blades (PTO) when not mowing. Shut off
engine and wait for all parts to come to a complete
stop before cleaning the machine, removing the grass
catcher, or unclogging the discharge guard.
13. Operate the machine only in daylight or good artificial
light.
14. Do not operate the unit while under the influence of
alcohol or drugs.
CAUTION
15 Watch for traffic when operating near or crossing
roadways.
This machine produces sound levels in
excess of 85 dBA at the operator’s ear and
can cause hearing loss though extended
periods of exposure.
16. Use extra care when loading or unloading the unit
into a trailer or truck.
17. Always wear eye protection when operating this unit.
18. Data indicates that operators, age 60 years and
above, are involved in a large percentage of power
equipment-related injuries. These operators should
evaluate their ability to operate the equipment safely
enough to protect themselves and others from injury.
Wear hearing protection when operating this
machine.
TRANSPORTING AND STORAGE
1. When transporting the unit on an open trailer, make
sure it is facing forward, in the direction of travel. If
the unit is facing backwards, wind lift could damage
the unit.
3. Never store the unit (with fuel) in an enclosed poorly
ventilated structure. Fuel vapors can travel to an
ignition source (such as a furnace, water heater, etc.)
and cause an explosion. Fuel vapor is also toxic to
humans and animals.
4. Never store the unit or fuel container inside where
there is an open flame or pilot light, such as near a
water heater. Allow unit to cool before storing.
2. Always observe safe refueling and fuel handling
practices when refueling the unit after transportation
or storage.
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SLOPE OPERATION
WARNING
Slopes are a major factor related to loss-of-control and tip-
over accidents, which can result in severe injury or death.
Operation on all slopes requires extra caution. If you cannot
back up the slope or if you feel uneasy on it, do not operate
on it.
Never operate on slopes greater than 17.6 percent
(10°) which is a rise of 3-1/2 feet (106 cm) vertically in
20 feet (607 cm) horizontally.
Select slow ground speed before driving onto slope.
Use extra caution when operating on slopes with rear-
mounted grass catchers.
Mow up and down the face of slopes, not across. Use
caution when changing directions and DO NOT
START OR STOP ON SLOPE.
Control of a walk-behind or ride-on machine sliding on a
slope will not be regained by the application of the brake.
The main reasons for loss of control are: insufficient tire
grip on the ground, speed too fast, inadequate braking, the
type of machine is unsuitable for its task, lack of awareness
of the ground conditions, incorrect hitching and load
distribution.
1. Mow up and down the face of slopes, not across.
2. Watch for holes, ruts, or bumps. Uneven terrain could
overturn the unit. Tall grass can hide obstacles.
3. Choose a slow speed so that you will not have to stop
or change speeds while on the slope.
4. Do not mow on wet grass. Tires may loose traction.
5. Avoid starting, stopping, or turning on a slope. If tires
lose traction (i.e. machine stops forward motion on a
slope), disengage the blade(s) (PTO) and drive
slowly off the slope.
CHILDREN
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the unit
and the mowing activity. Never assume that children will
remain where you last saw them.
1. Keep children out of the mowing area and under the
watchful care of another responsible adult.
2. Be alert and turn unit off if children enter the area.
3. Before and during reverse operation, look behind and
down for small children.
4. Never carry children, even with the blade(s) off. They
may fall off and be seriously injured or interfere with
safe unit operation. Children who have been given
rides in the past may suddenly appear in the mowing
area for another ride and be run over or backed over
by the machine.
5. Never allow children to operate the unit.
6. Use extra care when approaching blind corners,
shrubs, trees, or other objects that may obscure
vision.
6. Keep all movement on slopes slow and gradual. Do
not make sudden changes in speed or direction,
which could cause the machine to rollover.
7. Use extra care while operating machines with grass
catchers or other attachments; they can affect the
stability of the unit. Do not use on steeps slopes.
8. Do not try to stabilize the machine by putting your
foot on the ground (ride-on units).
9. Do not mow near drop-offs, ditches, or
embankments. The mower could suddenly turn over if
a wheel is over the edge of a cliff or ditch, or if an
edge caves in.
10. Do not use grass catchers on steep slopes.
11. Do not mow slopes if you cannot back up them.
12. See your authorized dealer/retailer for
recommendations of wheel weights or
counterweights to improve stability.
13. Remove obstacles such as rocks, tree limbs, etc.
14. Use slow speed. Tires may lose traction on slopes
even through the brakes are functioning properly.
15. Do not turn on slopes unless necessary, and then,
turn slowly and gradually uphill, if possible. Never
mow down slopes.
EMISSIONS
1. Engine exhaust from this product contains chemicals
known, in certain quantities, to cause cancer, birth
defects, or other reproductive harm.
2. Look for the relevant Emissions Durability Period and
Air Index information on the engine emissions label.
TOWED EQUIPMENT (RIDE-ON UNITS)
IGNITION SYSTEM
1. Tow only with a machine that has a hitch designed for
towing. Do not attach towed equipment except at the
hitch point.
1. This spark ignition system complies with Canadian
ICES-002.
2. Follow the manufacturer’s recommendations for
weight limit for towed equipment and towing on
slopes. See attaching a trailer under OPERATION.
3. Never allow children or others in or on towed
equipment.
4. On slopes, the weight of the towed equipment may
cause loss of traction and loss of control.
5. Travel slowly and allow extra distance to stop.
6. Do not shift to neutral and coast down hill.
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13. If the fuel tank must be drained, it should be drained
outdoors.
SERVICE AND MAINTENANCE
Safe Handling of Gasoline
1. Extinguish all cigarettes, cigars, pipes, and other
sources of ignition.
2. Use only approved gasoline containers.
3. Never remove the gas cap or add fuel with the engine
running. Allow the engine to cool before refueling.
4. Never fuel the machine indoors.
5. Never store the machine or fuel container where there
is an open flame, spark, or pilot light such as near a
water heater or other appliance.
6. Never fill containers inside a vehicle or on a truck bed
with a plastic bed liner. Always place containers on
the ground away from your vehicle before filling.
7. Remove gas-powered equipment from the truck or
trailer and refuel it on the ground. If this is not
possible, then refuel such equipment on a trailer with
a portable container, rather than from a gasoline
dispenser nozzle.
8. Keep nozzle in contact with the rim of the fuel tank or
container opening at all times until fueling is
complete. Do not use a nozzle lock-open device.
9. If fuel is spilled on clothing, change clothing
immediately.
10. Never over-fill the fuel tank. Replace gas cap and
tighten securely.
14. Replace faulty silencers/mufflers.
15. Maintain or replace safety and instruction labels as
necessary.
16. Use only authorized replacement parts when making
repairs.
17. Always comply with factory specifications on all
settings and adjustments.
18. Only authorized service locations should be utilized
for major service and repair requirements.
19. Never attempt to make major repairs on this unit
unless you have been properly trained. Improper
service procedures can result in hazardous operation,
equipment damage and voiding of manufacturer’s
warranty.
20. On multiple blade mowers, take care as rotating one
blade can cause other blades to rotate.
21. Do not change engine governor settings or over-
speed the engine. Operating the engine at excessive
speed can increase the hazard of personal injury.
22. Disengage drive attachments, stop the engine,
remove the key, and disconnect the spark plug wire(s)
before: clearing attachment blockages and chutes,
performing service work, striking an object, or if the
unit vibrates abnormally. After striking an object,
inspect the machine for damage and make repairs
before restarting and operating the equipment.
23. Never place hands near the moving parts, such as a
hydro pump cooling fan, when the tractor is running.
(Hydro pump cooling fans are typically located on top
of the transaxle).
11. Use extra care in handling gasoline and other fuels.
They are flammable and vapors are explosive.
12. If fuel is spilled, do not attempt to start the engine but
move the machine away from the area of spillage and
avoid creating any source of ignition until fuel vapors
have dissipated.
24. Units with hydraulic pumps, hoses, or motors:
WARNING: Hydraulic fluid escaping under pressure
may have sufficient force to penetrate skin and cause
serious injury. If foreign fluid is injected into the skin it
must be surgically removed within a few hours by a
doctor familiar with this form of injury or gangrene
may result. Keep body and hands away from pin
holes or nozzles that eject hydraulic fluid under high
pressure. Use paper or cardboard, and not hands, to
search for leaks. Make sure all hydraulic fluid
connections are tight and all hydraulic hoses and
lines are in good condition before applying pressure
to the system. If leaks occur, have the unit serviced
immediately by your authorized service center.
25. WARNING: Stored energy device. Improper release
of springs can result in serious personal injury.
Springs should be removed by an authorized
technician.
13. Replace all fuel tank caps and fuel container caps
securely.
Service & Maintenance
1. Never run the unit in an enclosed area where carbon
monoxide fumes may collect.
2. Keep nuts and bolts, especially blade attachment
bolts, tight and keep equipment in good condition.
3. Never tamper with safety devices. Check their proper
operation regularly and make necessary repairs if
they are not functioning properly.
4. Keep unit free of grass, leaves, or other debris build-
up. Clean up oil or fuel spillage. and remove any fuel-
soaked debris. Allow machine to cool before storage.
5. If you strike an object, stop and inspect the machine.
Repair, if necessary, before restarting.
6. Never make adjustments or repairs with the engine
running.
7. Check grass catcher components and the discharge
guard frequently and replace with manufacturer’s
recommended parts, when necessary.
8. Mower blades are sharp. Wrap the blade or wear
gloves, and use extra caution when servicing them.
9. Check brake operation frequently. Adjust and service
as required.
10. Maintain or replace safety and instructions labels, as
necessary.
11. Do not remove the fuel filter when the engine is hot
as spilled gasoline may ignite. Do not spread fuel line
clamps further than necessary. Ensure clamps grip
hoses firmly over the filter after installation.
12. Do not use gasoline containing METHANOL, gasohol
containing more than 10% ETHANOL, gasoline
additives, or white gas because engine/fuel system
damage could result.
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SAFETY & OPERATION DECALS
All DANGER, WARNING, CAUTION and instructional
messages on your rider and mower should be carefully
read and obeyed. Personal bodily injury can result when
these instructions are not followed. The information is for
your safety and it is important! The safety decals below
are on your rider and mower.
This unit has been designed and manufactured to
provide you with the safety and reliability you would
expect from an industry leader in outdoor power
equipment manufacturing.
Although reading this manual and the safety instructions
it contains will provide you with the necessary basic
knowledge to operate this equipment safely and
effectively, we have placed several safety labels on the
unit to remind you of this important information while you
are operating your unit.
If any of these decals are lost or damaged, replace them
at once. Contact your dealer for replacements.
These labels are easily applied and will act as a constant
visual reminder to you, and others who may use the
equipment, to follow the safety instructions necessary for
safe, effective operation.
Decal - Amputation and
Thrown Objects Hazard
(33” Decks)
Part No. 7101665
Decal - Control Panel
Part No. 1734272
DANGER
Amputation and thrown objects hazard
Decal - Tracking
Adjustment
Part No. 1726638
Keep hands and feet
away from deck.
Engine Speed
Decal - Hot Surfaces
Do not operate mower
FAST
unless discharge chute
Decal - Cutting
Height Switch
Part No. 1734276
or entire grass catcher
Part No. 1734273
(Located on RH side)
Decal - Ground
Speed Lever
is in its proper place.
7101665
Decal - Amputation and
Thrown Objects Hazard
(42 & 50” Decks)
Part No. 7102576
WARNING
Burn hazard
The exhaust pipe and surrounding
surfaces are hot and can cause
burns.
SLOW
Forward
Choke
Right Ground
RAISE
MOWER
CLOSED
(Pull Knob Up)
Speed Lever
(Controls Right Drive Wheel)
OPEN
(Push Knob Down)
Avoid contact with hot surfaces.
Part No. 1704277
Cutting
Height
Ignition Switch
Neutral
Start / Park
DANGER
LOWER
Reverse
ON
(Pull Up)
7102576
Decal - Cutting Hazard
Part No. 1734672
Mower Blades
MOWER
OFF
Amputation and
1734276
1734276
(Push Down)
Thrown Objects Hazard
To avoid injury from rotating blades and
thrown debris, stay clear of deck edge
and discharge. Do not mow without
(Located on rear frame)
deflector or entire grass catcher in place.
1734272
Decal - Operation, Upper
Part No. 7102575
To Turn On the Mower Blades:
1. Sit in seat.
2. Start the engine (see “To Start Engine”).
3. Pull the mower blade switch UP to
turn the mower blades ON.
To Stop the Engine:
1. Move ground speed levers to
START/PARK.
2. Move parking brake lever to
ENGAGE position.
3. Move engine speed control
to SLOW.
4. Turn ignition switch to OFF.
To Drive:
1. Start the engine (see “To Start Engine”).
2. Move parking brake control to
DISENGAGE position.
To Turn the Mower Blades Off:
1. Push the mower blade switch DOWN to
turn the mower blades OFF.
3. Move both ground speed levers in from
PARK position.
4. Move levers as shown to travel.
7102575
3
5
6
Sit in the seat.
1
Move the ground speed levers to START/PARK
2 positions
(move both levers out).
Move parking brake control to ENGAGE position.
Turn the mower blades OFF (push switch down).
3
4
5
Decal - Transmission
Release
Part No. 1734532
(Located on rear frame)
Move engine speed control to FAST position
(levers full forward).
Pull the choke knob up to CLOSED position.
Turn ignition switch to START to crank the engine.
After the engine starts:
-release the ignition switch key (it will return to RUN position)
-push the choke knob down to OPEN position
Always set the engine speed to FAST for mowing.
6
7
8
7
4
Forward
Left Ground
Speed Lever
(Controls Right Drive Wheel)
Start
/
Park
Neutral
High Cut
DANGER
4
3
2
Reverse
174xxxx
7102574
Decal - Ground Speed Lever
Part No. 1734270
Amputation Hazard
To avoid injury from rotating
blades, stay clear of deck edge.
Decal - Operation, Lower
Part No. 7102574
1704276
Decal - Amputation Hazard
(42 & 50” Decks)
Part No. 1704276
7102578
1
Decal - Parking Brake
Part No. 7102578
Low Cut
1733458
DANGER
Decal - Cutting Height
Indicator
Part No. 1733458
Amputation and thrown objects hazard
Keep hands and feet
away from deck.
Do not operate mower
unless discharge chute
or entire grass catcher
is in its proper place.
7101665
Decal - Amputation and
Thrown Objects Hazard
(33” Decks)
Part No. 7101665
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IDENTIFICATION NUMBERS
ID Tag
When contacting the service center for replacement
parts, service, or information you MUST have these
numbers.
Record your model name/number, manufacturer’s
identification numbers, and engine serial numbers in the
space provided for easy access.
The identification tag is located on the underside of the
seat. Tilt the seat forward to access the ID tag.
PRODUCT REFERENCE DATA
Model Description Name/Number
Part Number
Unit Serial Number
Date Purchased
ENGINE REFERENCE DATA
Engine Make
Engine Model
Engine Type/Spec
Engine Code/Serial Number
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OPERATION
Left
Right
Ground Speed
Control Lever
Ground Speed
Control Lever
Ground Speed Levers - Ground Speed Levers -
DRIVE Positons
START/PARK Positons
Mower
Cutting
Height
Switch
Parking
Choke
Brake
Lever
(Closed)
Choke
(Open)
Parking Brake Lever -
ENGAGE Positon
Parking Brake Lever -
DISENGAGE Positon
Fuel Tank
Cap
Engine
Speed
(Fast)
Engine
Speed
(Slow)
RUN
CONTROL FUNCTIONS
The information below briefly describes the
function of individual controls. Starting,
stopping, driving, and mowing require the
combined use of several controls applied in
specific sequences. To learn what combination
and sequence of controls to use for various
tasks please read the entire section.
START
OFF
Transmission
Mower Blade
Switch
Release Levers
Ignition
Switch
Figure 1. Controls
Ground Speed Levers
Parking Brake Lever
These levers control the ground speed of the rider. The
left lever controls the left rear drive wheel and the right
lever controls the right rear drive wheel.
Move the parking brake lever (bottom inset, Figure 1) up
and across and into the locking notch to engage and lock
the parking brake. Move the parking brake lever across
and down to disengage the parking brake. The engine
will not start unless the parking brake is engaged.
Pushing the levers out to the side, away from the
operator’s lap (top inset, Figure 1), is the proper position
for starting the rider. Pulling the levers in across the
operator’s lap puts the levers in DRIVE positions.
Note: The parking brake must be disengaged before
operating the ground speed levers.
From DRIVE position, moving a lever forward increases
the FORWARD speed of the associated wheel. Pulling
back on a lever increases the REVERSE speed. The
further a lever is pushed, the faster the drive wheel will
turn.
Engine Speed Control
The engine speed control adjusts engine speed. Always
set the engine speed to FAST for driving and mowing.
Move the engine speed control back to SLOW to
decrease engine speed. NEVER turn on the mower
blades with the engine speed set to SLOW. Only turn on
the mower blades with the engine speed set to FAST.
See DRIVING PRACTICE for steering instructions.
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Choke
Hour Meter
The hour meter measures the number of hours the key
has been in the RUN position.
CLOSE the choke for cold starting (pull knob up). OPEN
the choke once the engine starts (push knob down). If
the engine is warm, it may not require choking. If this is
the case, set the choke to OPEN (push the knob down)
while cranking the engine. In most cases, you will need
to close the choke in order to start the engine.
NOTE: The hour meter will register the passage of time
when the key is in the RUN position, even if the engine is
not running.
Mower Blade Switch
Mower Cutting Height Switch
The yellow mower blade switch turns the mower blades
on and off. To turn the mower blades ON, pull the switch
up. To turn the mower blades OFF, push the switch
down. Always set the engine speed control to FAST
before turning the mower blades ON, and while mowing.
To increase the mower cutting height (raise the mower
deck), press the top of the yellow cutting height switch.
To decrease mower cutting height (lower the mower
deck), press the bottom of the switch. Mower cutting
height range is approximately 3-3/4” to 1-1/2”. The
cutting height gauge indicates the position of the mower
deck. The cutting height gauge is located on the front of
the rider, just behind the driver’s left leg.
Transmission Release Levers
The transmission release levers deactivate the
transmissions so that the unit can be pushed by hand.
See PUSHING THE UNIT BY HAND for operational
information.
Ignition Switch
The ignition switch starts and stops the engine; it has
three positions:
Fuel Tank
OFF
Stops the engine and shuts off the
electrical system.
To remove the fuel tank cap, turn it counterclockwise.
RUN Allows the engine to run and powers the
electrical system.
START Cranks the engine for starting.
NOTE: Never leave the ignition switch in the RUN
position with the engine stopped. This drains the battery.
GENERAL OPERATING SAFETY
Before first time operation:
WARNING
If you do not understand how a specific control
functions, or have not yet thoroughly read the
CONTROL FUNCTIONS section, do so now.
Do NOT attempt to operate the rider without first
becoming familiar with the location and function
of ALL controls.
• Be sure to read all information in the Safety and
Operation sections before attempting to operate this
rider and mower.
• Become familiar with all of the controls and how to stop
the unit.
• Drive in an open area without mowing to become
accustomed to driving the unit.
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CHECKS BEFORE STARTING
• Check that the crankcase oil is filled to full mark on
dipstick (see CHECK ENGINE OIL in the
Maintenance section).
• Fill the fuel tank with fresh fuel.
FUEL RECOMMENDATIONS
For daily operation: Use only unleaded gasoline with a
pump sticker octane rating of 87 or higher. Gasohol (up
to 10% ethyl alcohol, 90% unleaded gasoline by volume)
is approved as a fuel. Methyl Teriary Butyl Ether (MTBE)
and unleaded gasoline blends (up to a maximum of 15%
MTBE by volume) are approved as a fuel. Do not use
unapproved gasolines, such as E85. Do not mix oil in
gasoline or modify the engine to run on alternate fuels.
This will damage the engine components and void the
engine warranty. Do not use fuel additives other than
fuel stabilizer.
A
Figure 2. Pre-Start Checks
A. Fuel Tank Cap
For storage: CAUTION: Alcohol blended fuels (called
gasohol or using ethanol or methanol) can attract
moisture which leads to separation and formation of
acids during storage. Acidic gas can damage the fuel
system of an engine while in storage.
WARNING
Never operate on slopes greater than 17.6 percent
(10°) which is a rise of 3-1/2 feet (106 cm)
vertically in 20 feet (607 cm) horizontally.
To avoid engine problems always use fuel stabilizer,
especially before storage of 30 days or longer. Use fresh
fuel next season. See STORAGE instructions for
additional information.
Select slow ground speed before driving onto a
slope. Use extra caution when operating on
slopes with a rear-mounted grass catcher.
Never use engine or carburetor cleaner products in the
fuel tank or permanent damage may occur. To add fuel:
Mow up and down the face of slopes, not across.
Use caution when changing directions and DO
NOT START OR STOP ON A SLOPE.
1. Remove the fuel cap (B, Figure 2).
2. Fill the tank. Do not overfill. Leave 2 inches (5 cm) of
space in the tank for fuel expansion.
WARNING - TRAILERS
3. Install and hand tighten the fuel cap.
Do not load this zero-turn rider on a trailer or
truck using two separate ramps. Only use a
single ramp that is at least one foot wider than
the width of the rear wheels of this rider. This
rider has a zero turning radius and the wheels
could fall off the ramps, or the rider could tip over
injuring the operator or bystanders.
WARNING
Never allow passengers to ride on the unit.
Before leaving the operator’s position for any
reason, engage the parking brake and disengage
the PTO. Never leave the unit unattended (i.e. out
of sight) with the engine running.
To reduce fire hazard, keep the engine, rider and
mower free of grass, leaves and excess grease.
Do not stop or park rider over dry leaves, grass or
combustible materials.
Gasoline is highly flammable and must be
handled with care. Never fill the tank when the
engine is still hot from recent operation. Do not
allow open flame, smoking or matches in the area.
Avoid over-filling and wipe up any spills.
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9. Stop the rider and engine (see STOPPING THE
RIDER AND ENGINE).
EMERGENCY STOPPING
In the event of an emergency the engine can be stopped
by simply turning the ignition switch to STOP. Use this
method only in emergency situations. For normal engine
shut down follow the procedure given in STOPPING THE
RIDER AND ENGINE.
PUSHING THE RIDER BY HAND
NOTE: Do not disengage the transmissions if parked on
a slope.
1. Turn the mower blades OFF, push the ground speed
control levers out to their START/PARK positions,
engage the parking brake, turn the ignition switch
OFF, remove the key, and wait for all moving parts to
stop.
STOPPING THE RIDER & ENGINE
1. Return the ground speed control levers to
START/PARK positions to stop rider movement.
2. Engage the parking brake.
2. Locate the transmission release levers (C, Figure 3)
at the rear of the unit.
3. Turn off the mower blades by pushing the mower
blade switch down to the OFF position.
3. Pull both levers back and down to release the
4. Move the engine speed control to SLOW position and
turn the ignition switch to OFF. Remove the key.
transmissions (position B, Figure 3).
4. Pull the ground speed control levers in to their DRIVE
positions, and disengage the parking brake.
STARTING THE ENGINE
The rider can now be pushed by hand.
1. While sitting in the seat, make sure the mower blade
switch is OFF, the ground speed control levers are
locked in START/PARK positions, and the parking
brake is engaged.
5. After moving the rider, set the ground speed control
levers to START/PARK, engage the parking brake,
and push both transmission release levers forward to
re-engage the transmissions (position A, Figure 3).
2. Move the engine speed control fully forward to FAST.
Set the choke control to CLOSED (pull knob UP).
DO NOT TOW RIDER
Towing the unit will cause transmission
damage. Do not use another vehicle to push
or pull this unit. Do not use this unit to push
or pull another vehicle or object.
NOTE: A warm engine may not require choking. In this
case, set the choke control to OPEN (push knob down).
3. Insert the key into the ignition switch and turn it to
START to crank the engine.
4. After the engine starts, release the key. It will return
to the RUN position. Gradually push the choke knob
down to OPEN position. Warm the engine by running
it for at least a minute before turning on the mower
blades, or driving the unit.
ALWAYS operate the unit with the engine speed
control set to FAST when mowing or driving.
NEVER engage the mower blades with the engine
speed set to SLOW.
A
MOWING
1. Start the engine (see STARTING THE ENGINE).
2. Set the mower cutting height to the desired setting
using the mower cutting height switch.
B
3. Set the engine speed control to FAST.
4. Turn the mower blades ON (pull switch up).
5. Disengage the parking brake.
C
6. Move the ground speed control levers in from
START/PARK positions to drive positions (levers in
across the operator’s lap).
Figure 3. Transmission Release Levers
A. Drive Position
B. Push Position
7. Begin mowing. See DRIVING PRACTICE.
C.Transmission Release Levers
8. When finished, turn the mower blades OFF (push
switch down).
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Smooth Travel
DRIVING PRACTICE -
BASIC DRIVING
The lever controls of the
zero turn rider are
WARNING: Never operate on slopes greater than 17.6%
(10°). See SLOPE OPERATION in the safety section.
Zero turn riders operate differently from other four-
wheeled vehicles. The drive wheels are also your
steering wheels. If you cannot drive the unit on a hill, you
will not be able to steer the unit on it. Operating zero
turn units on slopes requires extra caution.
highly responsive.
The BEST method of
handling the ground
speed control levers is in
three steps — as shown
in Figure 4.
FIRST place your hands
onto the levers as
shown.
The lever controls of the zero turn rider are very
responsive, and learning to gain a smooth and efficient
control of the rider’s forward, reverse, and turning
movements will take some practice.
SECOND, to go forward
gradually push the levers
forward with your palms.
Spend some time going through the following maneuvers
and becoming familiar with how the unit accelerates,
travels, and steers — before you begin mowing —is
absolutely essential to getting the most out of the zero
turn rider.
THIRD, to speed up
move the levers farther
forward. To slow down
smoothly, slowly move
the levers back toward
neutral.
Avoid turf damage! To avoid turf damage, keep both
drive wheels moving while executing turns. Pivoting on
one wheel, or dragging a wheel through a turn will
damage your lawn.
Figure 4. Move Control
Levers Gradually
Locate a smooth, flat area of your lawn — one with
plenty of room to maneuver. (Clear the area of objects,
people and animals before you begin.) Operate the unit
at mid-throttle during this practice session (ALWAYS
operate at full throttle when mowing), and turn slowly to
prevent tire slippage and damage to your lawn.
Forward Travel Practice
Gradually move both ground speed control levers evenly
FORWARD from neutral. Slow down and repeat.
Reverse Travel Practice
We suggest you begin with the Smooth Travel procedure
to the right, and then advance through the forward,
reverse, and turning maneuvers.
LOOK DOWN & BEHIND, then gradually move both
ground speed control levers evenly BACK from neutral.
Slow down and repeat.
WARNING
Do not mow in reverse unless absolutely
necessary. Always look down and behind before
and while traveling in reverse.
NOTE: Practice backing up for several minutes before
attempting to do so near objects. The rider turns as
sharply in reverse as when going forward, and backing
up straight takes practice.
Reverse Travel
Forward Travel
Figure 5. Forward Travel
Figure 6. Reverse Travel
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Practice Turning Around a Corner
Practice Turning In Place
While traveling forward allow one handle to gradually
return back toward neutral. Practice several times before
mowing.
To “zero turn” means to turn in place. To turn in place,
gradually move one ground speed control lever forward
from neutral and one lever back from neutral
simultaneously. Repeat several times.
NOTE: To prevent damaging your lawn by pivoting
directly on the tire tread, it is best to keep both wheels
going at least slightly forward.
Turning In Place
Executing Turns
Figure 7. Right Turn
Figure 8. Turning in Place
ADVANCED DRIVING
Executing an End-Of-Row Zero Turn
Your zero turn rider’s unique ability to turn in
place allows you to turn around at the end of a
cutting row rather than having to stop and make
a Y-turn before starting a new row.
For example, to execute a right end-of row zero
turn:
1. Slow down at the end of the row.
2. Move the LEFT ground speed control lever
forward slightly while moving the RIGHT
ground speed control lever back to center
and then slightly back from center. Be sure
to keep both wheels moving to avoid turf
damage.
3. Begin mowing forward again.
This technique turns the rider RIGHT and
slightly overlaps the row just cut —eliminating
the need to back up and re-cut missed grass.
As you become more familiar and experienced
with operating the zero turn rider, you will learn
more maneuvers that will make your mowing
time easier and more enjoyable.
Remember, the more you practice, the better
your control of the rider will be!
Figure 9. Executing an End-Of-Row Turn
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MOWER DECK REMOVAL &
INSTALLATION - 33” DECKS
A
B
C
NOTE: Perform mower removal and installation on a
hard, level surface such as a concrete floor.
WARNING
A
After lowering the mower cutting height, engage
parking brake, turn off the mower blades, turn the
ignition switch to STOP, and remove key before
attempting to install or remove the mower.
Removing the Mower Deck
1. Turn the mower blades OFF, put the ground speed
control levers in START/PARK position, engage the
parking brake, turn the ignition OFF, and wait for all
moving parts to stop.
D
2. Pivot the front wheels forward.
Figure 10. Mower Hitch Components - 33” Decks
A. Hair Pin Clips
B. Rear Lift Arms
C. Front Hitch Rod
D. 4x4 Wood Blocks
3. Pull the back-side idler pulley (C, Figure 11) forward
to release belt tension. Remove the mower belt from
engine PTO pulley (A).
4. Turn the ignition switch from OFF to RUN without
starting the engine.
5. Use the mower cutting height switch to raise the
mower deck.
6. Place 4x4 wood blocks (D, Figure 10) under the front
and rear lip of the mower deck to securely support it.
7. Use the mower cutting height switch to fully lower the
mower so that is it resting on the 4x4 wood blocks.
8. Turn the ignition switch to OFF and remove the key.
9. Remove the hair pin clips (A) securing the rear
mower lift arms (B) and the front hitch rod (C) to the
mower deck.
B
A
C
10. Separate the rear lift arms from the mower deck.
Repeat on both sides of the mower.
E
11. Remove the front hitch rod (C) from the front hitch
brackets.
D
12. Slide the mower deck out from under the rider.
Figure 11. Mower Belt Routing - 33” Decks
A. Engine PTO Pulley
B. Mower Drive Belt
C. Back-Side Idler Pulley
D. Stationary Idler Pulley
E. Arbor Pulley
Installing the Mower Deck
1. Slide the mower deck under the right side of the rider.
Align the holes in the front hitch brackets, and insert
the front hitch rod (C, Figure 10). Secure with hair pin
clip (A).
2. Connect the rear lift arms to the mower deck. Secure
with hair pin clips (A).
3. Insert the key into the ignition switch. Turn the switch
from OFF to RUN without starting the engine.
4. Use the cutting height switch to raise the mower until
it is no longer resting on the 4x4 wood blocks (D).
5. Turn the ignition switch OFF and remove the key.
Remove the 4x4 blocks (D).
6. Release mower belt tension, and install the belt as
shown in Figure 11.
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MOWER DECK REMOVAL &
INSTALLATION - 42” & 50” DECKS
B
C
A
NOTE: Perform mower removal and installation on a
hard, level surface such as a concrete floor.
WARNING
After lowering the mower cutting height, engage
parking brake, turn off the mower blades, turn the
ignition switch to STOP, and remove key before
attempting to install or remove the mower.
D
Removing the Mower Deck
1. Turn the mower blades OFF, put the ground speed
control levers in START/PARK position, engage the
parking brake, turn the ignition OFF, and wait for all
moving parts to stop.
Figure 12. Mower Hitch Components - 42 & 50” Decks
A. Hair Pin Clip
B. 3/8-16 x 3/4 Carriage Bolt & Flange Nut
C. Hitch Rod
D. 4x4 Wood Blocks
2. Pivot the front wheels forward.
3. Use the mower belt release lever (D, Figure 13) to
release belt tension. Remove the mower belt (B)
from engine pulley (A).
4. Turn the ignition switch from OFF to RUN without
starting the engine.
B
A
C
5. Use the mower cutting height switch to raise the
mower deck.
C
6. Place 4x4 wood blocks (D, Figure 12) under the front
and rear lip of the mower deck to securely support it.
7. Use the mower cutting height switch to fully lower the
mower so that is it resting on the 4x4 wood blocks.
8. Turn the ignition switch to OFF and remove the key.
9. Remove the hair pin clip (A) securing the rear mower
lift arm. Separate the lift arm from the mower deck.
Repeat on both sides of the mower.
E
D
42” Deck
E
A
10. Remove the hitch rod (C) from the hitch bracket.
11. Slide the mower deck out from under the rider.
B
Installing the Mower Deck
1. Slide the mower deck under the right side of the rider.
Slide the mower forward and hook the front hitch rod
(C, Figure 12) to the front mower deck hooks.
2. Slide the mower deck backwards and connect the
rear lift arms to the mower deck. Secure with hair pin
clips (A).
3. Insert the key into the ignition switch. Turn the switch
from OFF to RUN without starting the engine.
4. Use the cutting height switch to raise the mower until
it is no longer resting on the 4x4 wood blocks (D).
5. Turn the ignition switch OFF and remove the key.
Remove the 4x4 blocks (D).
6. Use the mower belt release lever to release mower
belt tension, and install the belt as shown in Figure
13.
E
D
50” Deck
C
Figure 13. Mower Belt Routing - 42” & 50” Decks
A. Engine Pulley
B. Mower Drive Belt
C. Idler Pulleys
D. Mower Belt Release Lever
E. Arbor Pulleys
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MAINTENANCE
MAINTENANCE SCHEDULE
The following schedules should be followed for normal care of your rider and mower.
Before
Spring
8
25
100
200
Yearly
RIDER MAINTENANCE, All Models
Each Use & Fall Hours Hours Hours Hours
Clean Debris from Rider and Engine Compartment *
Clean Debris from Engine Cooling Areas & Air Filter *
Check Tire Pressure
•
•
•
•
•
•
Lubricate Rider & Mower *
Clean Deck & Check/Replace Mower Blades
Clean Battery & Cables
Check Rider Safety System **
•
•
•
Check / Adjust PTO Clutch
•
8 Hours or
Daily
25 Hours or 50 Hours or 100 Hours or Yearly
ENGINE MAINTENANCE,
18.5, 21HP Briggs & Stratton
Every
Every
Every
Season
Season
Season
Check Engine Oil Level *
•
Service Air Pre-Cleaner *
Change Oil *
•
•
•
Service Air Filter *
Change Oil & Filter *
Clean Cooling Fins *
Replace Air Filter *
Replace Spark Plug
Replace Fuel Filter †
Check Valve Clearance †
•
•
•
•
•
•
8 Hours
or Daily
25 Hours
or Every
Season
50 Hours
or Every
Season
100 Hours
or Every
Season
100-400
Hours
ENGINE MAINTENANCE,
24, 26HP Briggs & Stratton
Check Engine Oil Level *
Replace Air Filter *
•
•
Change Oil *
•
Change Oil & Filter *
Clean Cooling Fins *
Replace Spark Plugs
Replace Fuel Filter †
Clean Combustion Chamber
•
•
•
•
•
* More often in hot (over 85° F: 30° C) weather or dusty operating conditions.
** Check the function of the safety system after the unit has been stored for 30 days or longer.
† These services should be performed by your dealer.
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Rider Maintenance Items
WARNING
Move the ground speed levers to START/PARK
positions, engage the parking brake, turn the
mower blades OFF, turn the ignition switch OFF,
and wait for all moving parts to stop before
accessing the engine compartment or performing
any maintenance procedures.
ACCESSING THE ENGINE
COMPARTMENT
Lift up on the back edge of the seat deck to access the
engine compartment.
Figure 14. Accessing the Engine Compartment
A
B
CLEAN DEBRIS FROM RIDER AND
ENGINE COMPARTMENT
Service Interval: Before each use.
CAUTION: If debris is not removed from the engine
compartment and other hot surfaces, it creates a fire
hazard. Before starting the unit at the beginning of the
mowing session, remove any grass clippings, dirt,
leaves, or other debris from the unit. Also clean out the
engine compartment.
CLEAN DEBRIS FROM ENGINE
COOLING AREAS AND AIR FILTER
Service Interval: Before each use.
CAUTION: If debris is not removed from the engine
compartment and other hot surfaces, it creates a fire
hazard. Before starting the unit at the beginning of the
mowing session, lift the seat deck and clean any debris
from the intake screen on top of the engine (A, Figure
15), exposed engine cooling fins, and around the air filter
assembly. Also open the air filter cover (B) and remove
any debris that has accumulated in the air filter
compartment.
Figure 15. Engine Compartment
A. Intake Screen
B. Air Filter Cover
CHECK TIRE PRESSURE
Service Interval: 25 Hours.
Tire
Front
Rear
Pressure
Tire pressure should be checked periodically, and
maintained at the levels shown in Figure 16. Note that
these pressures may differ slightly from the “Max
Inflation” stamped on the side-wall of the tires. The
pressures shown provide proper traction, improve cut
quality, and extend tire life.
18-20 psi (1,24-1,38 bar)
10-12 psi (,69-,83 bar)
Figure 16. Tire Pressures
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LUBRICATION
Service Interval: 25 hours.
Lubricate the unit at the locations shown in Figures 17
through 23 as well as the following lubrication points.
Grease:
• front wheel grease fittings
• front wheel bushings
• mower pivots
• mower arbors
Use grease fittings when present.
Not all greases are compatible. Use automotive-type
lithium grease.
Figure 18. Mower Lubrication - 42” Deck
Oil:
• hydro linkage
• brake linkage
• mower deck height adjustment linkage
• ground speed control linkage
Generally, all moving metal parts should be oiled where
contact is made with other parts. Keep oil and grease off
belts and pulleys. Remember to wipe fittings and
surfaces clean both before and after lubrication.
Figure 19. Mower Lubrication - 50” Deck
Figure 17. Mower Lubrication - 33” Deck
Figure 20. Arbor Lubrication
(3-Blade Model Shown, All Models Similar)
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Figure 23. Lubricating Mower Lift
Figure 21. Lubricating Rider
Figure 22. Lubricating Rider
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CLEAN DECK &
CHECK / REPLACE MOWER BLADES
Service Interval: 25 hours or as required.
WARNING
For your personal safety, do not handle the sharp
mower blades with bare hands. Careless or
improper handling of blades may result in serious
injury.
WARNING
Figure 24. Blade Removal - 33” Deck
For your personal safety, blade mounting
hardware must each be installed as per
instructions. Torque blade mounting hardware to
torque noted in instructions.
1. Remove mower deck (see “Mower Deck Removal” in
the OPERATION section).
2. See Figures 24 and 25. Remove blade to inspect it
or to safely access the underside of the mower deck.
Use a block of wood to prevent blade rotation while
loosening the hardware by turning it
counterclockwise.
3. Remove the hardware and blade.
4. Clean the underside of the mower deck.
LOOSEN
5. Inspect the blade(s) for nicks or dull edges. Use a file
to sharpen blade to a fine edge. If the blade is
damaged, it must be replaced.
Figure 25. Blade Removal - 42” & 50” Deck
6. Balance the blade as shown in Figure 26. Center the
blade’s hole on a nail lubricated with a drop of oil. A
balanced blade will remain level. If the blade is not
balanced, continue to sharpen the heavy side until it
balances.
Workbench
7. Reinstall the blade with the lift wings (D, Figure 28; E,
Figure 29) pointing up toward the mower deck as
shown.
8. Reinstall the hardware as noted in Figures 27
through 29. Use a wooden block to prevent blade
rotation while tightening the hardware to the following
torque:
Nail
Figure 26. Balancing The Blade
33” Blade - 30-40 ft. lbs. (41-54 Nm)
42” Blade - 80-90 ft. lbs. (108-122 Nm)
50” Blade - 45-55 ft. lbs. (61-75 Nm)
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B
C
D
A
E
D
C
A
B
Figure 29. Blade Installation - 50” Deck
A. 4x4 Wood Block
B. Hex Washer
Figure 27. Blade Installation - 33” Deck
A. Blade
B. Blade Mounting Bolts
C. Lockwashers
C. Spring Washer
D. Blade Capscrew
E. Lift Wings
D. Hex Nuts
D
A
B
C
Figure 28. Blade Installation - 42” Deck
A. 4x4 Wood Block
B. Spring Washers
C. Blade Nut
D. Lift Wings
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CLEAN THE BATTERY AND CABLES
Service Interval: 100 Hours
CHECK RIDER SAFETY
SYSTEM
Service Interval: Every 100 hours, every spring/fall, and
after storage of 30 days or longer.
WARNING
Be careful when handling the battery. Avoid
spilling electrolyte. Keep flames and sparks away
from the battery.
When removing or installing battery cables,
disconnect the negative cable FIRST and reconnect
it LAST. If not done in this order, the positive
terminal can be shorted to the frame by a tool.
This unit is equipped with safety interlock switches.
These safety systems are present for your safety. Do not
attempt to bypass safety switches, and never tamper
with safety devices. Check their operation regularly.
Operational SAFETY Checks
TEST 1 — ENGINE SHOULD NOT CRANK IF:
• Mower blades switch is ON, OR
Always wear safety glasses and gloves when
handling batteries.
• Ground speed control levers are not in their
START/PARK positions, OR
1. Disconnect the cables from the battery, negative
cable first (B, Figure 30).
• Parking brake lever is in DISENGAGE position.
TEST 2 — ENGINE SHOULD CRANK IF:
• Mower blade switch is OFF, AND
2. Remove the rubber strap securing the battery, and
remove the battery.
3. Clean the battery and battery compartment with a
solution of baking soda and water.
• Ground speed control levers are in their
START/PARK positions, AND
4. Clean the battery terminals and cable ends with a
wire brush until shiny.
• Parking brake lever is in ENGAGE position.
TEST 3 — ENGINE SHOULD SHUT OFF IF:
5. Reinstall the battery and secure with the rubber strap.
• Operator rises off seat with the mower blade switch
ON, OR
6. Reattach the battery cables: first attach the positive
cable (see A, Figure 30), then attach the negative
cable (B).
• Operator rises off seat with the ground speed levers
in DRIVE positions, OR
7. Coat the cable ends and battery terminals with
petroleum jelly or non-conducting grease.
• Operator rises off seat with the parking brake in
DISENGAGE position, OR
NOTE: On models with 33” decks, the battery is mounted
on the right side of the engine compartment.
• Operator moves the left and/or right ground speed
control lever out of its START/PARK position with the
parking brake lever in ENGAGE position.
TEST 4 — BLADE BRAKE CHECK
The mower blades and mower drive belt should come to
a complete stop within five seconds after the mower
blade switch is turned OFF. If mower drive belt does not
stop within five seconds, contact your local authorized
dealer.
NOTE: Once the engine has stopped, the mower blade
switch must be turned OFF, the ground speed control
levers must be locked in their START/PARK positions,
and the parking brake lever must be in the ENGAGE
position in order to start the engine.
B
A
WARNING
If the unit does not pass a safety test, do not
operate it. See your local authorized dealer. Under
no circumstance should you attempt to defeat the
purpose of the safety interlock system.
Figure 30. Engine Compartment
A. Positive (+) Battery Cable
B. Negative (-) Battery Cable
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CHECK / ADJUST PTO CLUTCH
A
B
WARNING
To avoid serious injury, perform adjustments only
with engine stopped, key removed and tractor on
level ground.
Service Interval: 200 Hours.
B
The Power Take Off (PTO) clutch drives the mower
blades. The PTO clutch is engaged and disengaged by
the mower blade switch. Check the PTO clutch
adjustment every 200 hours of operation. Also perform
the following procedure if the clutch is slipping, will not
engage, or if a new clutch has been installed.
B
Figure 31. PTO Clutch Adjustment
A. Adjustment Window (Qty. 3, one shown)
B. Adjustment Nut
1. Remove key from ignition switch and disconnect
spark plug wires to prevent the possibility of
accidental starting while the PTO is being adjusted.
B
2. See Figure 31. Note the position of the 3 adjustment
windows (A) in the side of the brake plate and the
nylock adjustment nuts (B).
A
3. Insert a .012”-.015” (2,5-4mm) feeler gauge (C)
through each window, positioning the gauge between
the rotor face and the armature face as shown in
Figure 32.
C
4. Alternately tighten the adjustment nuts (B, Figure 24)
until the rotor face and armature face just contacts
the gauge.
Figure 32. Adjust PTO Clutch
A. Window
B. Adjustment Nut
C. Feeler Gauge
5. Check the windows for an equal amount of tension
when the gauge is inserted and removed, and make
any necessary adjustments by tightening or
loosening the adjustment nuts.
NOTE: The actual air gap between the rotor and
armature may vary even after performing the adjustment
procedure. This is due to dimensional variations on
component parts, and is an acceptable condition.
6. Check the mower blade stopping time. The mower
blades and mower drive belt should come to a
complete stop within five seconds after the electric
PTO switch is turned off. If adjustment does not stop
a mower braking problem, replace the electric PTO
clutch.
23
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Engine Maintenance Items
Use oil classified API Service Class SF,
SG, SH, SJ or better with SAE Viscosity:
CHECK ENGINE OIL LEVEL
Service Interval: Before each use, and every 8 hours.
30 Conventional**
5W-30
10W-30
Conventional*
1. Turn the engine off, and set the parking brake lever to
ENGAGE.
2. Clean the area around the dip stick (C, Figure 34).
Synthetic 5W-30, 10W-30
3. Remove the dip stick (C) and clean it with a paper
towel.
˚F -20
-30
0
20 32 40
-7
60
16
80
27
100
38
-18
0
4
˚C
4. Insert the dip stick back into the engine. Thread the
cap back into the tube (D).
*CAUTION: Air cooled engines run hotter than automotive engines.
The use of non-synthetic multi-viscosity oils (5W-30, 10W-30, etc.)
in temperatures above 40º F (4ºC) will result in higher than normal
oil consumption. When using a multi-viscosity oil, check oil level
more frequently.
5. Remove the dip stick and read the oil level. The oil
level should be between the “FULL” and “ADD” marks
(D). If not, add oil according to the oil
**CAUTION: SAE 30 oil, if used below 40º F (4ºC), will result in hard
starting and possible engine bore damage due to inadequate
lubrication.
recommendations chart (Figure 33).
Figure 33. Recommended Engine Oil -
Briggs & Stratton Models
CHANGE ENGINE OIL
Service Interval: 50 hours or once per season.
D
NOTE: Change engine oil while the engine is warm. Run
the engine for a few minutes, then shut the engine off
and allow it to cool from hot to warm.
B
A
1. Clean the area around the dip stick (C, Figure 34)
and oil drain tube (A).
2. Remove the oil drain plug (A) from the end of the oil
drain tube. Remove the dip stick (C). Allow ample
time for complete drainage.
3. Reinstall the oil drain plug (A) and route the hose
next to the engine.
4. Fill the crankcase with oil. See CHECK ENGINE OIL
LEVEL above.
C
5. Start and run the engine at SLOW speed for 30
seconds. Stop the engine and recheck the oil level.
CHANGE ENGINE OIL & FILTER
Service Interval: 100 hours or once per season.
Figure 34. Oil Change - Briggs & Stratton Models
A. Oil Drain Tube
B. Oil Filter
C. Dip Stick
D. Checking Oil Level
NOTE: Change engine oil while the engine is warm. Run
the engine for a few minutes, then shut the engine off
and allow it to cool from hot to warm.
1. Clean the area around the dip stick (C, Figure 34)
and oil drain (A).
6. Reinstall the oil drain plug (A).
7. Fill the crankcase with oil. See CHECK ENGINE OIL
LEVEL above.
2. Remove the oil drain plug (A) and dip stick (C). Allow
ample time for complete drainage.
8. Start and run the engine at SLOW speed for 30
seconds. Stop the engine and recheck the oil level.
3. Remove the oil filter (B). Discard the filter.
4. Using a drop of oil on your finger tip, wet the rubber
gasket on the bottom of the new filter.
9. Test run the engine to check for leaks. Stop the
engine for 1 minute, then recheck the oil level.
5. Turn the filter clockwise until the rubber gasket meets
the filter base. Then turn 1/2 to 3/4 turn more.
24
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SERVICE AIR FILTER &
PRE-CLEANER - 18.5 & 21 HP
ENGINES
A
B
NOTE: Air filter configuration may differ from shown.
Consult engine manual for further information.
Interval: Pre-Cleaner: Every 25 hours or as required.
Air Filter: Every 50 hours or as required.
A
B
Replacement Interval: Pre-Cleaner: As required. Air
Filter: Every 200 hours or once per season.
1.
Air Filter Removal & Installation
1. Lift up on the bottom of the latch (A, Figure 35 or 36)
and flip the latch away from the cover.
A
2. Remove the cover (B). Remove the filter (C, Figure
36) and pre-cleaner (D).
2.
B
3. Install the pre-cleaner (D) with the mesh side up.
Install the filter (C) as shown.
4. Install the cover (B, Figure 36) making sure the tabs
are inserted into their slots. Secure with the latch (A).
3.
Figure 35. Air Filter Assembly - Briggs & Stratton
Single Cylinder Models
A. Air Filter Latch
B. Air Filter Cover
A
C
D
B
Figure 36. Air Filter Service - Briggs & Stratton
Single Cylinder Models
A. Air Filter Latch
B. Air Filter Cover
C. Air Filter
D. Pre-Cleaner
25
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A
A
Figure 37. Air Filter Cover
A. Air Filter Cover Screws
Figure 38. Air Filter Removal
A. Filter Cartridge
SERVICE AIR FILTER -
24 & 26HP ENGINES
A
NOTE: Air filter configuration may differ from shown.
Consult engine manual for further information.
Service Interval: Every 25 hours or as required.
1. Loosen the air filter cover screws (A, Figure 37) and
remove the air filter cover.
2. Locate the air filter cartridge (A, Figure 38). Pull up
on the front edge of the cartridge until it snaps out of
place.
3. Inspect the cartridge for dirt or damage.
If the thin foam sleeve surrounding the filter is
damaged, replace the filer. DO NOT oil the foam
sleeve or cartridge. If there is oil of heavy dirt on the
cartridge, replace it.
DO NOT use pressurized air or solvents to clean the
filter cartridge.
Remove any dirt from the air filter housing.
4. Replace the cartridge by aligning the hole of the
cartridge with the air vent (A, Figure 39).
5. Push the cartridge in toward the engine until it snaps
into place.
6. Reinstall the air filter cover and tighten the screws (A,
Figure 37).
Figure 39. Air Filter Installation
A. Filter Cartridge
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Pre-Cleaner Service
Pre-Cleaner
Air Filter
NOTE: Replace a worn or damaged pre-cleaner.
1.
1.
2.
1. Figure 40. Wash the pre-cleaner in liquid detergent
and water.
2. Squeeze the pre-cleaner dry and saturate with
engine oil. Remove all excess oil by squeezing the
pre-cleaner in an absorbent cloth.
2.
Air Filter Service
NOTE: Replace a worn or damaged air filter.
1. Figure 40. If stamped “Washable,” the filter can be
washed with warm water and mild soap.
Figure 40. Air Filter Service
2. Rinse with tap water with the screen side UP allowing
dirt and debris to filter out.
3. Allow the filter to dry overnight before reinstalling.
REPLACE SPARK PLUG
Service Interval: Yearly
Spark Plug Gap: .030” (.76mm)
1. Stop the engine and allow it to cool.
2. Clean the area around the spark plug.
3. Remove the spark plug.
26hp
4. Check the spark plug gap. It should be .030” (see
Figure 41).
5. Reinstall the plug into the cylinder head. Torque the
plug to 180 in. lbs (20 N.m.).
CLEAN COMBUSTION CHAMBER -
BRIGGS & STRATTON MODELS
Service Interval: 100-400 hours
18.5 &
21hp
In order to maintain emission compliance, we
recommend that after every 100-400 hours of operation
you have an authorized Briggs & Stratton Service Center
remove combustion deposits from the cylinder, cylinder
head, top of piston, and around the valves.
Figure 41. Spark Plug Gapping
27
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SERVICE & ADJUSTMENTS
GROUND SPEED CONTROL LEVER
ADJUSTMENT
C
The control levers have three adjustments:
To Adjust Control Lever Height: Pull the levers in
across the operator’s lap to their DRIVE positions.
Loosen the mount bolts (D, Figure 42) and raise or lower
the levers to the desired position. Tighten the mounting
bolts.(D).
A
D
To Adjust Control Lever End Gap: The control lever
end gap (C, Figure 43) should be adjusted so that the
levers do not contact each other when placed in DRIVE
positions. Loosen the jam nut (A, Figure 42) and adjust
the length of the carriage bolt (B) so that the levers do
not contact each other. Repeat on the opposite side.
Tighten the jam nut (A) to lock the carriage bolt in
position.
B
E
To Adjust Operator Clearance: The space between the
operator and the control levers can be increase by
removing the lower mounting bolt (D, Figure 42), pivoting
the lever forward, and reinstalling the capscrew through
the control lever and forward slot (C). Repeat with the
other ground speed lever.
Figure 42. Control Lever Adjustment
A. Jam Nut
B. Carriage Bolt
C. Forward Slot
D. Mount Bolts
E. Knob
SPEED BALANCING ADJUSTMENT
If the rider veers to the right or left when the ground
speed control levers are in the maximum forward
position, the top speed of the right lever can be balanced
by turning the adjustment knob (E, Figure 42). Loosen
the jam nut and turn the knob COUNTERCLOCKWISE
to increase speed or CLOCKWISE to decrease speed.
Tighten the jam nut when complete.
C
CUTTING HEIGHT ADJUSTMENT
A
To increase the mower cutting height (raise the mower
deck), press the top of the mower cutting height switch
(A, Figure 43) To decrease mower cutting height (lower
the mower deck), press the bottom of the switch. Mower
cutting height range is 3-3/4” to 1-1/2”. The cutting height
gauge indicates the position of the mower deck.. The
cutting height gauge (B) is located on the front of the
rider, just behind the driver’s left leg.
RA
ISE
MOWE
R
C
uttin
Heigh
g
LOW
MOWE
E
R
R
173
427
6
4
H
ig
h
C
u
t
B
3
2
1
17
33
45
L
8
o
w
C
ut
PTO CLUTCH ADJUSTMENT
See CHECK / ADJUST PTO CLUTCH in the
Maintenance Section.
Figure 43. Cutting Height Adjustment
A. Cutting Height Adjustment Switch
B. Cutting Height Gauge
C. Control Lever End Gap
28
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BRAKE ADJUSTMENT
1. Stop the unit, turn the ignition OFF, set the ground
speed levers to START/PARK positions, set the
parking brake lever to the ENGAGE position, and wait
for all moving parts to stop.
3" (7.62cm)
2. Locate the brake rod (A, Figure 44) and adjustment
nut (B).
D
3. Measure the parking brake spring. Its compressed
length, with the parking brake lever in the ENGAGE
position, should be 3” (7.62cm). Adjust the spring
length by turning the adjustment nut (B), if necessary.
A
B
WARNING
Corrosion hazard.
Batteries contain acid. Always keep the
battery upright and do not spill the
electrolyte. Avoid contact with skin and
eyes.
C
Explosion hazard.
Changing the battery produces explosive
hydrogen gas. Only charge the battery in a
well ventilated area, away from any ignition
source such as a water heater, electric
motor, or a lit cigarette.
Figure 44. Brake Adjustment
A. Brake Rod
B. Adjustment Nut
C. Return Spring (Removed for Illustration Only)
D. Return Spring Hole
Wear Protective Equipment
Always wear gloves and safety glasses
when handling the battery and battery
cables.
BATTERY CHARGING
A dead battery or one too weak to start the engine may
be the result of a defect in the charging system or other
electrical component. If there is any doubt about the
cause of the problem, contact your local dealer. If you
need to replace the battery, follow the steps under
Cleaning the Battery & Cables in the Regular
Maintenance Section.
To charge the battery, follow the instructions provided by
the battery charger manufacturer as well as all warnings
included in the safety rules sections of this book. Charge
the battery until fully charged (until the specific gravity of
the electrolyte is 1.250 or higher and the electrolyte
temperature is at least 60° F). Do not charge at a rate
higher than 10 amps.
ENGINE ADJUSTMENTS
The engine is designed to deliver the correct
performance under all operating conditions. Any
adjustments must be performed by your local authorized
dealer.
29
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MOWER DECK LEVELING
ADJUSTMENTS
A
B
WARNING
Before inspecting or adjusting the mower, turn
the mower blades OFF, turn the ignition switch
OFF, and allow all moving parts to stop. Remove
ignition key, then disconnect the spark plug wire
and fasten it away from the spark plug.
C
Figure 45. Measure Blade Tips to Ground
A. Mower Deck
B. Blade Tip
Side to Side Leveling - 33” Decks
If the cut is uneven, the mower may need leveling.
Unequal or improper tire pressure may also cause an
uneven cut. See CHECK TIRE PRESSURE.
C. Level Ground
1. With the mower installed, place the rider on a
smooth, level surface such as a concrete floor. Turn
the front wheels straight forward. Turn the engine off,
set the ground speed control levers to START/PARK,
set the parking brake lever to ENGAGE, and wait for
all moving parts to stop.
2. Check for bent blades and replace if necessary.
3. Check the tire pressures. See CHECK TIRE
PRESSURE.
4. Set the cutting height to mid position. Arrange the
mower blade so that it is pointing from side-to-side
(Figure 46).
Figure 46. Orient Blades Side-to-Side
5. Measure the distance between the tips of the blade
and the ground (Figures 45 & 46). If there is more
than 1/8" (3mm) difference between the
measurements on each side, proceed to step 6. If the
difference is 1/8" (3mm) or less, proceed to Front To
Back Leveling.
B
6. See Figure 47. Side-to-side leveling is accomplished
using the threaded rods (A, Figure 47) and trunnion
(B) on the right and left rear sides of the mower deck.
Loosen the jam nuts (C) and adjust the nuts up or
down to adjust the mower level. When complete,
tighten the jam nuts against the trunnion to lock the
adjustment in place.
C
A
Figure 47. Side-to-Side Adjustment
A. Threaded Rod
B. Trunnion
C. Jam Nuts
30
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MOWER DECK LEVELING
ADJUSTMENTS
A
B
WARNING
Before adjusting the mower, turn the mower
blades OFF, turn the ignition switch OFF, remove
the key, and allow all moving parts to stop.
Disconnect the spark plug wire and fasten it away
from the spark plug.
C
Figure 48. Measure Blade Tips to Ground
A. Mower Deck
B. Blade Tip
Side to Side Leveling - 42” & 50” Decks
If the cut is uneven, the mower may need leveling.
Unequal or improper tire pressure may also cause an
uneven cut. See CHECK TIRE PRESSURE.
C. Level Ground
1. With the mower installed, place the rider on a
smooth, level surface such as a concrete floor. Turn
the front wheels straight forward. Turn the engine off,
set the ground speed control levers to PARK, set the
parking brake lever to ENGAGE, and wait for all
moving parts to stop.
42” Deck
2. Check for bent blades and replace if necessary.
3. Check the tire pressures. See CHECK TIRE
PRESSURE.
4. Set the cutting height to mid position. Arrange the
mower blades so that they are pointing from side-to-
side (Figure 49).
50” Deck
5. Measure the distance between the tips of the outside
blades and the ground (Figures 48 & 49). If there is
more than 1/8" (3mm) difference between the
measurements on each side, proceed to step 6. If the
difference is 1/8" (3mm) or less, proceed to Front To
Back Leveling.
Figure 49. Orient Blades Side-to-Side
B
6. See Figure 50. Side-to-side leveling is accomplished
using the threaded rods (A) and trunnion (B) on the
right and left rear sides of the mower deck. Loosen
the jam nuts (C) and adjust the nuts up or down to
adjust the mower level. When complete, tighten the
jam nuts against the trunnion to lock the adjustment
in place.
A
C
Figure 50. Side-to-Side Adjustment
A. Threaded Rod
B. Trunnion
C. Jam Nuts
31
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A
B
Figure 51. Orient Blades Front-to-Back
Front To Back Leveling - 33” Deck
If the cut is uneven, the mower may need leveling.
Unequal or improper tire pressure may also cause an
uneven cut. See CHECK TIRE PRESSURE.
Figure 52. Front-to-Back Leveling
A. Hitch Rod
B. Jam Nuts (hidden from view)
1. Turn the blade front-to-back as shown in Figure 51.
Measure the distance from the ground to front tip of
blade, and from ground to rear tip of blade (Figures
51). Front tip should be 1/8"-1/4" (3-6 mm) higher
than rear tip. If not, proceed to step 2.
2. The front mower hitch rod (A, Figure 52) is used to
adjust front-to-back leveling. To raise or lower the
front of mower deck, adjust the front jam nuts (C) on
both sides of the hitch rod (A) to adjust the deck level.
32
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C
42” Deck
B
A
Figure 54. Front-to-Back Leveling
A. Hitch Rod
50” Deck
B. Rear Jam Nut
C. Front Jam Nut
Figure 53. Orient Blades Front-to-Back
Front To Back Leveling - 42” & 50” Decks
If the cut is uneven, the mower may need leveling.
Unequal or improper tire pressure may also cause an
uneven cut. See CHECK TIRE PRESSURE.
1. Turn the blades front-to-back as shown in Figure 53.
Measure the distance from the ground to front tip of
center blade, and from ground to rear tips of left hand
and right hand blades (Figure 53). Front tips should
be 1/8"-1/4" (3-6 mm) higher than rear tips. If not,
proceed to step 2.
2. The front mower hitch rod (A, Figure 54) is used to
adjust front-to-back leveling. To raise or lower the
front of mower deck, loosen the two rear jam nuts (B)
on both sides of the hitch rod (A). Adjust the front
jam nuts (C) on both sides of the hitch rod (A) to
adjust the deck level. When adjusted correctly,
tighten the rear jam nuts (B) to lock hitch rod in place.
33
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MOWER BELT REPLACEMENT
B
A
WARNING
Before inspecting or servicing the mower, turn the
mower blades OFF, turn the ignition switch OFF,
and allow all moving parts to stop. Remove
ignition key, then disconnect the spark plug wire
and fasten it away from the spark plug.
C
E
D
Mower Drive Belt Replacement - 33” Decks
1. Park the rider on a level surface. Disengage the PTO,
turn off the engine, set the ground speed control
levers to START/PARK, and set the parking brake
lever to ENGAGE. Remove the key.
Figure 55. Mower Belt Routing - 33” Decks
A. Engine PTO Pulley
B. Mower Drive Belt
C. Back-Side Idler Pulley
D. Stationary Idler Pulley
E. Arbor Pulley
2. Pull the idler pulley (C, Figure 55) to release belt
tension and remove the mower drive belt (B) from the
PTO pulley (A).
3. Remove the belt from the remaining deck pulleys.
Note: The left rear threaded rod must be removed
from the mower in order to completely remove the
belt. Refer to the section entitled ‘Mower Deck
Removal and Installation’.
E
4. Install the new belt (B) as shown in Figure 55.
A
F
Mower Drive Belt Replacement - 42” Decks
F
1. Park the rider on a level surface. Disengage the PTO,
turn off the engine, set the ground speed control
levers to START/PARK, and set the parking brake
lever to ENGAGE. Remove the key.
B
2. Use the idler pulley arm (C, Figure 56) to release belt
tension and remove the mower drive belt (A) from the
PTO pulley (E).
C
D
3. Remove the belt from the remaining deck pulleys.
Note: It is not necessary to remove the mower deck.
Figure 56. PTO Belt Routing - 42” Decks
A. Mower Drive Belt
B. Right Arbor Pulley
C. Idler Pulley Arm
4. Install the new belt (A) as shown in Figure 56.
D. Left Arbor Pulley
E. Engine PTO Pulley
F. Backside Idler Pulley
34
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Mower Drive Belt Replacement - 50” Decks
G
A
F
1. Park the rider on a level surface. Disengage the PTO,
turn off the engine, set the ground speed control
levers to START/PARK, and set the parking brake to
ENGAGE. Remove the key.
B
2. Use the idler pulley arm (K, Figure 57) to release belt
tension and remove the mower drive belt (F) from the
PTO pulley (G).
E
C
D
3. Remove the belt from the remaining deck pulleys.
Note: It is not necessary to remove the mower deck.
4. Install the new belt (F) as shown in Figure 57.
K
H
I
J
Arbor Drive Belt Replacement
Contact your local authorized dealer for replacement of
the arbor drive belt (A, Figure 57).
Figure 57. PTO Belt Routing
A. Arbor Drive Belt
B. Right Arbor Pulley
C. Arbor Idler Pulley
D. Center Arbor Pulley
E. Left Arbor Pulley
F. Mower Drive Belt
G. Engine PTO Pulley
H. Mower Drive Pulley
I. Mower Idler Pulley
J. Backside Idler Pulley
K. Idler Pulley Arm
STORAGE
STORAGE
Before Storage
WARNING
Never store the unit (with fuel) in an enclosed,
poorly ventilated structure. Fuel vapors can
travel to an ignition source (such as a furnace,
water heater, etc.) and cause an explosion.
Before you store your unit for the off-season, read the
Maintenance and Storage instructions in the Safety
Rules section, then perform the following steps:
Fuel vapor is also toxic to humans and animals.
• Turn the mower blades OFF, set the ground speed
control levers to START / PARK, set the parking brake
lever to ENGAGE, and remove the key from the
ignition switch.
gas can damage the fuel system of an engine while in
storage.
• Check all fluid levels. Check all maintenance items.
To avoid engine problems use fuel stabilizer, especially
before storage of 30 days or longer.
• Battery life will be increased if it is removed, put in a
cool, dry place and fully charged about once a
month. If the battery is left in the unit, disconnect the
negative cable.
After Storage
Before starting the unit after it has been stored:
• Check all fluid levels. Check all maintenance items.
• Fill with FRESH fuel.
It is important to prevent gum deposits from forming in
the essential fuel system parts such as the carburetor,
fuel filter, fuel line, and fuel tank during storage. Also,
alcohol blended fuels (called gasohol or using ethanol or
methanol) can attract moisture which leads to the
separation and formation of acids during storage. Acidic
• After starting, allow the engine to warm before
operating.
35
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TROUBLESHOOTING
While normal care and regular maintenance will extend
WARNING
the life of your equipment, prolonged or constant use
may eventually require that service be performed to allow
it to continue operating properly. The troubleshooting
guide below lists the most common problems, their
causes and remedies.
To avoid serious injury, perform maintenance on
the rider or mower only when the engine is
stopped, the ground speed levers are set to
START/PARK, and the parking brake lever is set to
ENGAGE.
If you prefer, all of these procedures can be performed
by your local authorized dealer.
Always remove the ignition key, disconnect the
spark plug wire and fasten it away from the plug
before beginning the maintenance, to prevent
accidental starting of the engine.
Troubleshooting the Rider
PROBLEM
CAUSE
REMEDY
Engine will
Ignition switch not turned fully to START position. Turn ignition switch fully to START position.
not turnover.
Ground speed levers not set to START/PARK.
Mower blade switch in ON position.
Parking brake lever in DISENGAGE position.
Set to START/PARK.
Place in OFF position.
Set to ENGAGE position.
Battery terminals require cleaning.
Battery discharged or dead.
Clean the battery terminals
Recharge or replace.
Wiring loose or broken; connector separated.
Visually check wiring & replace broken or frayed
wires. Tighten loose connections.
Safety interlock switch faulty.
Replace. Contact your local authorized dealer.
Replace. Contact your local authorized dealer.
Move choke to CLOSED position.
Solenoid or starter motor faulty.
Engine will
Engine is cold; choke not in CLOSED position.
Engine is warm; choke not in OPEN position.
turnover but
will not start.
Move choke to OPEN position.
Engine flooded.
Set choke to OPEN position when cranking engine.
Allow engine to cool, then refill the fuel tank.
Out of fuel.
Fuel is old or stale, or water in fuel.
Drain fuel & replace with fresh fuel. Contact your
local authorized dealer.
Spark plug(s) faulty, fouled or incorrectly gapped. Clean and gap or replace.
Safety interlock switch faulty. Replace. Contact your local authorized dealer.
Engine starts Air filter plugged
hard or runs
Service pre-cleaner and/or replace air filter
element.
poorly.
Choke not set to CLOSED position when
Set choke to CLOSED when cranking. Set choke
cranking the engine, OR choke not set to OPEN to OPEN when engine is running. A warm engine
after engine starts.
may not require choking.
Spark plug faulty, fouled, or incorrectly gapped.
Clean and gap or replace.
Engine
Low oil level.
Check/add oil as required.
knocks.
Using wrong grade oil.
See "Change Engine Oil" in the Maintenance
Section.
Excessive oil Engine running too hot.
consumption.
Clean engine cooling fins, blower screen and air
cleaner.
Using wrong weight oil.
See "Change Engine Oil" in the Maintenance
Section.
Too much oil in crankcase.
Drain excess oil.
Engine
exhaust is
black.
Dirty air filter or pre-cleaner, or both.
Service or replace as required. See Maintenance
Section.
Choke set to CLOSED when engine is running.
36
Set choke to OPEN as soon as engine starts.
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Engine runs, but Transmission release levers in PUSH
Move levers to DRIVE positions.
rider will not
drive.
positions.
Drive belt slips.
Clean or replace belt as necessary.
Belt is broken.
Replace drive belt. Contact your local authorized dealer.
Contact your local authorized dealer.
Parking brake is not fully released.
Parking brake is incorrectly adjusted.
Parking brake
will not hold.
See Service & Adjustments Section.
Rider steers or
handles poorly.
Improper tire inflation.
See Maintenance Section.
Steering linkage is loose.
Check and tighten any loose connections.
Rider tracks to
one side.
Ground speed adjustment knobs not
adjusted.
See SPEED BALANCING ADJUSTMENT in Service &
Adjustments section.
Troubleshooting the Mower
PROBLEM
CAUSE
REMEDY
Mower cutting
Cutting height motor screw dirty or requires Thoroughly clean and lubricate cutting height motor
height does not lube.
screw.
adjust.
Cutting height linkage disconnected.
Check that mower linkage is connected.
See Maintenance Section.
Mower cut is
uneven.
Rider tires not inflated equally or properly.
Mower not leveled properly.
See "Mower Leveling" in Service & Adjustments.
Mower cut is
rough looking.
Engine speed too slow.
Ground speed too fast.
Blades are dull.
Always set engine speed to FAST when mowing.
Decrease ground speed.
Sharpen or replace blades. See Maintenance
Section.
Mower drive belt slipping because it is oily or Clean or replace belt as necessary.
worn.
Blades not properly fastened to arbors.
See "Check/Replace Mower Blades" in Maintenance
Section.
Engine stalls
easily with
mower engaged.
Engine speed too slow.
Ground speed too fast.
Cutting height set too low.
Always set engine speed to FAST when mowing.
Decrease Ground Speed.
Cut tall grass at maximum cutting height during first
pass.
Underside of mower deck dirty.
Remove mower deck and clean underside.
Discharge chute jamming with cut grass.
Cut grass with discharge pointing toward previously
cut area.
Excessive
mower
Blade mounting nuts are loose.
Torque as per instructions. See Maintenance
Section.
vibration.
Mower blades, arbors, or pulleys are bent.
Mower blades are out of balance.
Check and replace as necessary.
Replace or balance blades. See Maintenance
Section.
Belt installed incorrectly.
Reinstall correctly.
Mower drive belt Idler pulley spring broken or not properly
slips or fails to attached.
Repair or replace as needed.
drive.
Mower drive belt broken.
Replace drive belt.
PTO clutch out of adjustment.
Adjust PTO clutch. See Maintenance Section.
37
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SPECIFICATIONS
NOTE: Specifications are correct at time of printing and are subject to change without notice.
ENGINE (18.5HP):
CHASSIS:
Make
Briggs & Stratton
ELS
Fuel Tank Cap.
Rear Wheels
Capacity: 3.25 Gallons (12,3 L)
Tire Size: 18 x 8.5 -8
Model
Horsepower
Displacement
18.5 @ 3600 rpm
30.59 Cu. in (500cc)
Inflation Pressure: 10-12 psi (,69-,83 bar)
Tire Size: 11 x 4-5
Front Wheels
Inflation Press.: 18-20 psi (1,24-1,30 bar)
ENGINE (21HP):
TRANSMISSION:
Make
Briggs & Stratton
Model
ELS
Type
Hydro-Gear EZT ZC-AHBB-2A7B-1DPX
Horsepower
Displacement
21 @ 3600 rpm
30.59 Cu. in (500cc)
Hydraulic Fluid
Continuous Torque
Output
20w 50 Premium Engine Oil
115 ft. lbs.
Maximum Weight
per Axle
340 lbs
ENGINE (24HP):
Make
Briggs & Stratton
Model
ELS
Horsepower
Displacement
24 @ 3600 rpm
44.2 Cu. in (725cc)
ENGINE (26HP):
Make
Briggs & Stratton
Model
ELS
Horsepower
Displacement
26 @ 3600 rpm
44.2 Cu. in (725cc)
The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of Automotive Engineers)
code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been obtained and corrected in
accordance with SAE J1995 (Revision 2002-05). Torque values are derived at 3060 RPM; horsepower values are derived at 3600
RPM. Actual gross engine power will be lower and is affected by, among other things, ambient operating conditions and engine-to-
engine variability. Given both the wide array of products on which engines are placed and the variety of environmental issues
applicable to operating the equipment, the gas engine will not develop the rated gross power when used in a given piece of power
equipment (actual "on-site" or net horsepower). This difference is due to a variety of factors including, but not limited to,
accessories (air cleaner, exhaust, charging, cooling, carburetor, fuel pump, etc.), application limitations, ambient operating
conditions (temperature, humidity, altitude), and engine-to-engine variability. Due to manufacturing and capacity limitations, Briggs
& Stratton may substitute an engine of higher rated power for this Series engine.
38
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SERVICE ITEMS
Replacement Parts
Technical Manuals
Replacement parts are available from your authorized
dealer. Always use genuine Simplicity or Snapper
Service Parts.
Additional copies of this manual are available, as well as
fully illustrated parts lists. These manuals show all of the
product’s components in exploded views (3D illustrations
which show the relationship of parts and how they go
together) as well as part numbers and quantities used.
Important assembly notes and torque values are also
included.
Maintenance Items
Many convenient and helpful service and maintenance
items are available from you authorized dealer. Some of
these items include:
For applicable manuals currently available for your
model, contact our Customer Publications Department at
877-249-6647. Have the information listed in the box at
left available when phoning in your request. Technical
manuals can be downloaded from
Engine Oil
Tire Sealant
Touch-Up Paint
Grease Gun Kit
8 oz. Grease Tube
Degrimer/Degreaser
Gas Stabilizer
Model:
Mfg. No.:
Your Name:
Address:
City, State, Zip:
Visa/Mastercard No.:
Card Expiration Date:
39
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Lawn Care
& Mowing Information
HOW TO WATER YOUR LAWN
HOW AND WHEN TO
WATER, FERTILIZE &
AERATE
Most lawns are watered too often,
but with too little water. However
too much water can allow develop-
ment of diseases with your lawn. It is
best to water the lawn only when
necessary, and then to water it
slowly, evenly, and deeply—imitat-
ing a slow, soaking rain.
The best method of watering a lawn
is to imitate a slow, soaking rain,
applying about 1 inch of water.
HOW TO FERTILIZE YOUR LAWN
Fertilizing with a slow-release fertiliz-
er provides missing nutrients which
help create slow, even growth.
Remember that over-fertilizing can
cause harm, and that most fertilizing
should be applied in the spring so
that it will release into the lawn
through the summer.
WHEN TO WATER YOUR LAWN
AERATING YOUR LAWN
When the lawn begins to wilt, the grass’s color dulls, or
footprints stay compressed for more than a few seconds,
the lawn is beginning to dry out, and needs additional
moisture. The best time to water is early morning to allow
the water to soak deeply into the lawn and reduce the
amount that evaporates in the hot afternoon sun.
Consider aerating your lawn in spring. Using an aerator
to remove cores of soil from the lawn increases the
speed of clipping decomposition and encourages deeper
root growth by opening up the soil and permitting greater
movement of water, fertilizer and air.
HOW HIGH TO MOW THE GRASS
Cut less than
Cutting the grass too short causes weak, thin
grass plants, which are easily damaged by dry
periods and pests.
1/3
Optimal
cutting point
at less than
1/3 from top
of grass blade
Letting grass grow a bit longer—especially when it
is hot and dry—reduces heat build-up, preserves
needed moisture and protects the grass from heat
damage and other problems.
Cutting down to this
area contributes to
thatch problems
Cutting off too much at one time shocks the plant’s
growth system and weakens the grass plants. A
good rule of thumb is the 1/3 rule: to cut no
more than one third of the grass height, and
never more than 1 inch at a time.
Cut Here On
First Pass
Cut
Tall Grass Requires Incremental Cutting
For extremely tall grass, set the cutting height at maxi-
mum for the first pass, and then reset it to the desired
height and mow a second or third time.
Here On
Second
Pass
Don’t cover the grass surface with a heavy layer of
clippings.
TP 600-2136-03-UV-SMA
LC-1
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Lawn Care & Mowing Information
WHEN AND HOW OFTEN TO MOW
The time of day and condition of the grass greatly affect the results you’ll
get when mowing. For the best results, follow these guidelines:
G Mow when the grass is between 3”-4” (7,5-10 cm) high.
G Mow with sharp blades. Short clippings of grass one inch or shorter
decompose more quickly than longer blades. Sharp mower blades cut
grass cleanly and efficiently, preventing frayed edges which harm the
grass.
G Mow at time of day when the grass is cool and dry. Late afternoon or
early evening often provide these ideal mowing conditions.
G Avoid mowing after rain or even heavy dew, and never mulch when the
grass is wet (moist grass does not mulch well, and clumps beneath the
mower deck).
Note: Always operate the engine at full throttle when mowing.
PROPER MOWING SPEED
ENGINE SPEED & GROUND SPEED
Always operate the engine at full throttle when mowing.
If you hear the engine slowing down, you are mowing too
fast—maintaining a slower ground speed will improve the
cutting efficiency of the blades and prevents many com-
mon cutting problems.
Select an appropriate ground speed for the thickness
and height of the grass you are cutting (3rd gear or slow-
er for manual gear models, or mid-range or slower for
hydro models). If you hear the engine slowing down you
are mowing too fast, use a slower ground speed.
HOW MUCH GRASS TO CUT OFF
Mow when the grass is 3”-4” inches (7,5-10cm) long. Do
not cut off more that 1” (2.5cm) of grass in a single pass.
LC-2
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PRODUCTS, INC.
535 Macon Street
McDonough, GA 30253
MANUFACTURING, INC.
500 N Spring Street / PO Box 997
Port Washington, WI 53074-0997
Briggs & Stratton Yard Power Products Group
Copyright © 2008 Briggs & Stratton Corporation
Milwaukee, WI USA. All Rights Reserved
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