Safety Instructions & Operator’s Manual for
21” STEEL DECK
WALK MOWERS
“M” MODEL
SERIES 14
MODELS
PUSH MODELS
PROPELLED MODELS
MR215014B
MRP216014B
MCRS215014KWV MRP216014T
MCRP215014KWV
EMRP216014B
MODEL NUMBER EXPLANATION
M
C
R
P
21
50
14 KW
V
MODEL DESIGNATION
SELF-PROPELLED
ENGINE OPTIONS
ENGINE TYPE
CUTTING WIDTH
SERIES DESIGNATION
ENGINE HORSE POWER
M – Middle Market
C – Commercial Model
P – Self Propelled Model
S – Swivel Front Wheels
R – Recycling Model
E – European Model
21 – 21” Cutting Width
14 – Series Designation
T – Tecumseh Engine
B – Briggs Engine
50 – 5.0 HP (Engine Horse Power)
60 – 6.0 HP (Engine Horse Power)
KW – Kawasaki Engine
V – Over Head Valve Engine
Thank you for buying a SNAPPER Product! Before operating your Walk Behind, read this manual carefully and pay
particular attention to the “IMPORTANT SAFETY INSTRUCTIONS” on Pages 2 & 3. Remember that all power
equipment can be dangerous if used improperly. Also keep in mind that SAFETY requires careful use in accordance
with the operating instructions and common sense.
COPYRIGHT © 1999
SNAPPER INC.
ALL RIGHTS RESERVED
MANUAL No. 4-1936 (REV. 3, 9/20/99)
IMPORTANT SAFETY INSTRUCTIONS
OPERATION
MAINTENANCE AND STORAGE
1. DO NOT put hands or feet near or under rotating
parts. Keep clear of discharge area while engine is
running.
1. DO NOT store mower or fuel container inside
where fumes may reach an open flame, spark or
pilot light such as in a water heater, furnace,
clothes dryer or other gas appliance. Allow
engine to cool before storing machine in an
enclosure. Store fuel container out of reach of
2. STOP engine when crossing gravel drives, walks, or
roads, and under any conditions where thrown
objects might be a hazard.
3. Mow only in daylight or good artificial light.
4. DO NOT operate mower while under the influence
of alcohol or drugs.
5. After striking a foreign object or if mower vibrates
abnormally, STOP the engine, disconnect and
secure spark plug wire. Inspect the mower for any
damage and repair the damage.
6. DO NOT mow near drop offs, ditches or
embankments. Operator could lose footing or
balance.
7. STAY ALERT for holes and other hidden
hazards. Tall grass can hide obstacles. Keep
away from ditches, washouts, culverts, fences
and protruding objects.
children in
building.
a
well ventilated, unoccupied
2. Keep mower and engine free of grass, leaves or
excess grease to reduce fire hazard and engine
overheating.
3. When draining fuel tank, drain fuel into an
approved container outdoors and away from
open flame.
4. Keep all bolts, especially blade bolts, nuts and
screws properly tight. Check that all cotter pins
are in proper position.
5. Always provide adequate ventilation when
running engine. Engine exhaust gases contain
carbon monoxide, a deadly poison.
8. DO NOT mow on wet grass. Always be sure of
your footing. Keep a firm hold on the handle
and walk, never run. Slipping could cause
injury.
9. DO NOT leave the machine with the engine
running. STOP BLADE and STOP ENGINE
before leaving the operators position for any
reason.
10. Before cleaning, repairing or inspecting make
certain engine, blade and all moving parts have
STOPPED. Disconnect and secure spark plug
wire away from plug to prevent accidental
starting.
11. STOP engine and wait until the blade comes to
complete STOP before removing grass bag
and/or clearing grass.
12. DO NOT operate mower without the entire grass
catcher or guards in place. DO NOT point
discharge at people, passing cars, windows or
doors.
13. Slow down before turning.
14. Watch out for traffic when near or crossing
roadways.
6. Service engine and make adjustments only
when engine is stopped. Removed spark plug
wire from spark plug and secure wire away from
spark plug to prevent accidental starting.
7. DO NOT change engine governor speed
settings or overspeed engine.
8. Check grass bag assembly frequently for wear
or deterioration to avoid thrown objects and
exposure to moving parts. Replace with new
bag if loose seams or tears are evident. Replace
slider or bag adapter if broken or cracked.
9. Mower blades are sharp and can cut. Wrap the
blades or wear heavy leather gloves and use
CAUTION when handling them.
10. DO NOT test for spark by grounding spark plug
next to spark plug hole; spark plug could ignite
gas exiting engine.
11. Have machine serviced by an authorized
SNAPPER dealer at least once a year and have
the dealer install any new safety devices.
12. Use only genuine SNAPPER replacement parts
to assure that original standards are
maintained.
15. DO NOT operate engine in enclosed areas.
Engine
exhaust
gases
contain
carbon
monoxide, a deadly poison.
3
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS.............................................2 & 3
TABLE OF CONTENTS ............................................................................ 4
SECTION 1 - FAMILIARIZATION.............................................................. 5
SECTION 2 - OPERATING INSTRUCTIONS.........................................6-8
Pre-start Checklist...................................................................................................... 6
Starting & Stopping Engine & Blades ................................................................... 6-7
Starting & Stopping Wheel Drive.............................................................................. 7
Adjusting Handle Height............................................................................................ 7
Adjusting Cutting Height ........................................................................................... 8
Locking and Unlocking Swivel Wheel...................................................................... 8
Recycling Operation................................................................................................... 8
SECTION 3 - MAINTENANCE INSTRUCTIONS..................................9-10
Changing Engine Oil.................................................................................................. 9
Checking Transmission Grease........................................................................... 9-10
Checking Mower Blade............................................................................................ 10
Checking Engine Drive Belt .................................................................................... 10
Checking Transmission Poly-V Belt....................................................................... 10
Annually (End of Each Season) .............................................................................. 10
Engine................................................................................................................... 10
Air Filter................................................................................................................ 10
Engine Oil............................................................................................................. 10
Storage Procedure ................................................................................................... 10
SECTION 4 - ADJUSTMENTS AND REPAIR....................................11-19
Mower Blade Repair/Replacement..................................................................... 11-12
Wheel Drive Control Adjustment ............................................................................ 12
Driven and Drive Disc Service ................................................................................ 13
Cleaning Drive Disc and Driven Disc................................................................. 13
Drive Spring Repair/Replacement...................................................................... 13
Driven Disc Adjustment................................................................................. 13-14
Driven Disc Replacement (Commercial Models)......................................... 14-15
Driven Disc Replacement (Non Commercial Models)...................................... 15
Driven Disc Bearing Replacement (Commercial Models) ............................... 16
Driven Disc Bearing Replacement (Non Commercial Models) ....................... 16
Hex Shaft Bearing Replacement ........................................................................ 17
Belt Service.......................................................................................................... 17-19
Engine Drive Belt Replacement .................................................................... 17-19
Transmission Poly-V Belt Replacement............................................................ 19
TROUBLESHOOTING ............................................................................ 20
SERVICE SCHEDULE ............................................................................ 21
Maintenance/Replacement Parts ............................................................................ 21
WARRANTY............................................................................................ 22
PRIMARY MAINTENANCE ................................................................23-26
4
RABBIT
”FAST”
Section 1 - FAMILIARIZATION
ENGINE
SPEED
CONTROL
SYMBOLS
WHEEL DRIVE
CONTROL
BLADE
CONTROL
UPPER
HANDLE
TURTLE
”SLOW”
ENGINE
SPEED
FAST
CONTROL
GROUND SPEED
CONTROL
SLOW
MID-
HANDLE
ROPE
START
HANDLE
LOWER
HANDLE
KNOB
OIL FILL CAP & DIPSTICK
FUEL
FILLER
CAP
ENGINE AIR
FILTER COVER
KNOB
REAR HEIGHT
ADJUSTMENT
LEVER
MOWER DECK
REAR WHEEL
RECYCLING DECK
COVER
PRIMER
BULB
FRONT HEIGHT
ADJUSTMENT
LEVER
FRONT WHEEL
FIGURE 1.1
1.1 INTRODUCTION
1.2 NOMENCLATURE
This manual has been prepared for the operators of
the SNAPPER WALK BEHIND MOWERS. Its
purpose, aside from recommending operating and
routine service requirements, is to promote safety
through the use of accepted operating practices.
Read, Understand and Follow the “IMPORTANT
SAFETY INSTRUCTIONS” on Pages 2 & 3 of this
manual and all safety messages on the mower and
attachments before operating the mower.
The nomenclature drawing above, Figure 1.1, shows
the essential parts of the SNAPPER WALK BEHIND
MOWERS. It is recommended that all operators of
the mower become thoroughly familiar with the
controls, parts and operation of the mower before
operating. Specific details involving the engine are
found in the separate engine owner’s manual. Study
these manuals before operating and keep both handy
for future reference.
5
Section 2 - OPERATING INSTRUCTIONS
2.1 PRE-START CHECK LIST
2.1.6. Clean exterior surfaces of cutting deck and
Make the following checks and perform the service
required before each start-up.
2.1.1. Check guards, deflectors, grass bag, adapter
and covers to make sure all are in place and securely
tightened.
engine of any accumulation of spilled fuel, dirt, grass,
oil, etc. Keep engine air intake screen and cooling
fins clear at all times.
2.2 STARTING & OPERATION
2.2.1. ENGINE & BLADE
(Primer Models)
2.1.2. Check blade control and wheel drive control to
insure they work freely. See Figure 2.1.
(Push & Non Commercial Self-Propelled)
1. Primer models do not have an adjustable engine
speed control. The engine speed is fixed in the “Fast”
position and can not be changed.
2. Push primer button three times to start a cold
engine. NOTE: Do not use primer button to start
warm engine. See Figure 2.3.
NOTE: Stop the engine (and blade) by releasing the
blade control.
CHECK
WHEEL
DRIVE
CHECK
BLADE
CONTROL
CONTROL
FOR ENGINES
EQUIPPED
WITH PRIMER
BULB
FIGURE 2.1
PUSH PRIMER
THREE TIMES
TO START COLD
ENGINE
2.1.3. Check cutting height. Adjust to desired height.
2.1.4. Check engine oil and add oil as needed to bring
level up to the full mark. Refer to Engine Owner’s
Manual for oil specifications. See Figure 2.2.
FIGURE 2.3
3. Pull blade control against handle.
4. Pull rope start handle to crank engine.
5. After engine starts, allow a brief warm-up until
engine runs smooth.
FIGURE 2.2
2.1.5. Add fuel to tank after pushing the mower
outside where fumes can safely dissipate. Make sure
cap is tightened after refueling. Refer to Engine
Owners Manual for specifications.
6
Section 2 - OPERATING INSTRUCTIONS
2.2 STARTING & OPERATION
2.2.2. ENGINE & BLADE
GROUND SPEED
CONTROL
(Choke Models)(Commercial Only)
1. Move choke/engine speed control to the “Choke”
position. See Figure 2.4.
FAST SPEED
NOTE: Stop the engine (and blade) by releasing the
blade control.
MOVE CHOKE/ENGINE
SPEED CONTROL TO THE
CHOKE POSITION
SLOW SPEED
PULL ROPE START
HANDLE TO CRANK
ENGINE
PULL BLADE
CONTROL AGAINST
HANDLE
FIGURE 2.5
2.3 STOPPING
Stop engine and blade by releasing the blade
control. Stop forward motion of mower by releasing
the wheel drive control.
ENGAGE
WHEEL DRIVE
CONTROL
2.4 HANDLE HEIGHT ADJUSTMENT
The height of the mower handle can be adjusted as
follows:
FIGURE 2.4
1. Loosen the lower nuts on each lower handle as
shown in Figure 2.6.
NOTE: Do not use choke to start warm engine.
HIGHER
2. Pull blade control against handle.
3. Pull rope start handle to crank engine.
4. After engine starts, move choke/engine speed
control away from the choke position to the “Fast”
(Rabbit) position and allow a brief warm-up until
engine runs smooth.
LOWER
HANDLE
WARNING
LOWER
Stop engine and mower blade by releasing the blade
control before adjusting ground speed.
LOOSEN LOWER
NUTS ON EACH
LOWER HANDLE
2.2.3. PROPELLING MOWER
(Self Propelled Models Only)
1. Stop engine and mower blade by releasing
the blade control before adjusting ground
speed. Move ground speed control to the desired
speed position. See Figure 2.5.
FIGURE 2.6
2. Follow starting engine procedure found in
Section 2.2. Starting & Operation - Engine & Blade.
3. Move wheel drive control against handle to
engage wheel drive and propel mower forward. See
Figure 2.4.
2. Move upper mower handle up or down until the
desired position is achieved.
3. Tighten the lower nuts on each lower handle to
maintain desired position.
7
Section 2 - OPERATING INSTRUCTIONS
2.6 SWIVEL WHEEL LOCK and UNLOCK
WARNING
(Swivel Wheel Models Only)
Before attempting any adjustments to the cutting height,
STOP the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. DO NOT make
any adjustments with engine or blade running. Be
extremely careful when performing adjustments around
engine. Engine is extremely hot and can cause severe
burns. Wear heavy leather gloves when handling or
working around cutting blades. Blades are extremely sharp
and can cause severe injury.
IMPORTANT: Engage the lock on the swivel wheel to
maintain better control of machine when operating on
slopes.
1. Stand in the operator’s position. Push machine
forward until swivel wheel is positioned in the
forward direction. Wheel must be positioned in a
forward direction to engage swivel wheel lock.
2. Push wheel lock lever forward to lock swivel
wheel in place. Swivel wheel will stay in the forward
direction position. See Figure 2.9.
3. Pull wheel lock lever rearward to unlock swivel
wheel. In the unlocked position, the swivel wheel will
rotate 360 degrees.
2.5 CUTTING HEIGHT ADJUSTMENT
1. Fixed Wheel Models: Pull the height adjusting
latch outward and move to desired cutting height.
See Figure 2.7.
2. Swivel Wheel Models: Remove hair pin and
clevis pin install in highest hole for lowest cutting
height and lowest hole for highest cutting height.
IMPORTANT: Move rear height adjustment latch for rear
wheel adjustment to correspond with raising or lowering
the front wheels to maintain the level of the deck.
PUSH LOCK
LEVER
FORWARD TO
LOCK POSITION
REMOVE HAIR PIN
AND CLEVIS PIN
SWIVEL
LOCK
SHOWN IN
SWIVEL
WHEEL
MODEL
UNLOCKED
SHOWN IN
LOWEST CUTTING
SWIVEL LOCK
POSITION
SHOWN IN
LOCK
POSITION
HIGHEST CUTTING
HEIGHT
LATCH
1 LOWEST
CUTTING
HEIGHT
FIXED
WHEEL
MODEL
2
3
4
5
6 HIGHEST
CUTTING
HEIGHT
FRONT WHEEL MUST BE IN
A FORWARD POSITION
BEFORE ENGAGING
6
SWIVEL LOCK
FIGURE 2.9
FIGURE 2.7
2.7 RECYCLING OPERATION
3. Set all wheels at the same cutting height. The
highest cutting position is Notch 6. The lowest
cutting position is Notch 1. See Figure 2.8.
NOTE: For best recycling results, cut up to a maximum of
1/3 of grass blade length and recycle ONLY when grass is
dry.
6
LATCH
POSITIONS
1. Set all wheels in the highest cutting position (Notch 6).
2. Move engine speed control to “FAST” (Rabbit)
position.
3. Move ground speed control to slowest speed setting.
4. Proceed mowing slowly. If grass is very dense, lower
each rear wheel latch one notch lower than the front
wheel latches to improve recycling performance.
5
4
3
2
1
FIGURE 2.8
8
Section 3 - MAINTENANCE
3.1 INTRODUCTION
3.2.2. CHECK GREASE LEVEL IN TRANSMISSION
1. Remove transmission fill plug. See Figure 3.2.
2. If liquid grease IS NOT visible on the input gear (the
small gear below the plug hole), add an amount, to
cover gear, of Snapper “00” grease. See Figure 3.2.
To retain the quality of the mower, use genuine
SNAPPER replacement parts only. Contact a local
SNAPPER dealer for parts and service assistance.
For the correct part or information for a particular
mower, always mention model and serial number.
3.2 SERVICE - AFTER FIRST 5 HOURS
3.2.1. CHANGE ENGINE OIL
FILL PLUG
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Engine
oil is extremely hot and can cause severe burns.
Allow engine oil to cool before draining to prevent
injury.
1. Refer to Engine Manual for proper oil
specifications and procedures.
2. For simplest/cleanest oil change, loosen lower
handle wing nuts and stand mower up on lower
handle as shown in Figure 3.1. Drain oil through
dipstick tube into a container.
FIGURE 3.2
NOTE: Snapper “00” Grease (Part No. 2-9443) is available
at your SNAPPER dealer.
(Continued on Next Page)
FIGURE 3.1
9
Section 3 - MAINTENANCE
3.2.2. CHECK GREASE LEVEL IN TRANSMISSION
3.2.5 CHECK TRANSMISSION POLY-V BELT
1. Visually check poly-v belt for cracking, fraying,
severed or belt strands exposed. Replace belt before
operating mower.
NOTE: Do not spill grease or oil on surface of drive disc.
See Figure 3.3.
3. Reinstall transmission plug.
4. Thereafter, check grease level after each 25
hours of operation.
RECOMMENDED
BLADE RETAINING
CAP SCREW
TORQUE VALUE
SHOULD BE 30 TO
40 FT. LBS.
KEEP DRIVE DISC CLEAN !
FIGURE 3.4
3.3 ANNUALLY (END OF EACH SEASON)
Perform all maintenance as described in the maintenance
schedule.
FIGURE 3.3
3.3.1. Engine
Service engine according to engine owner’s manual.
3.3.2. Air Filter
Refer to engine owner’s manual for service instructions.
3.3.3. Engine Oil
Refer to engine owner’s manual for service instructions.
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.
3.4 STORAGE PROCEDURE
Refer to the Engine Owner’s Manual for directions
regarding engine storage preparations. Prepare the
mower for “end of season” storage as follows:
1. Drain fuel from fuel tank and let engine run until
all fuel is out of the carburetor.
IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from crankcase will saturate the air
filter and cause the engine to be hard to start or not start
at all. If contamination does occur, the air filter will have to
be replaced.
2. Disconnect and remove the spark plug wire
away from spark plug before any other
preparations are made!
3. Tape all openings closed to prevent spraying
water into exhaust or air intakes during washing.
4. Tilt mower up on its rear wheels and thoroughly
clean the underside of the deck. Do not tilt mower
with spark plug or carburetor down. Scrape away
any accumulation of grass with a putty knife and or
wire brush.
5. Lubricate all exposed metal with a light coating
of oil to prevent corrosion.
6. On self-propelled models, loosen wing nuts on
ground speed control rod before folding handles.
7. Loosen handle knobs. Carefully fold the handles
forward, “flexing” the control cables to prevent cable
damage.
3.2.3 CHECK MOWER BLADE
1. Disconnect spark plug wire and secure end away
from plug.
2. Tilt mower up on its rear wheels for access to
the blade cap screw. Do not tilt mower with spark
plug or carburetor down. See Figure 3.4.
3. Check torque of blade retaining cap screw.
Recommended torque should be 30 to 40 ft. lbs.
See Figure 3.4.
4. Check blade for sharpness, wear and damage. See
Section on Blade Wear Limits.
3.2.4 CHECK ENGINE DRIVE BELT
1. Visually check engine drive belt for cracking,
fraying, severed or belt strands exposed. Replace belt
before operating mower.
8. Store the mower in a shed or other dry area,
protected from weather.
10
Section 4 - ADJUSTMENTS & REPAIR
2. Replace the blade if it is badly chipped, bent,
WARNING
noticeably out of balance or has cracks or notch in
either tip. See Figure 4.1 & 4.2. Replace with new
blade.
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Wear
heavy leather gloves when handling or working
around cutting blades. Blades are extremely sharp
and can cause severe injury.
WARNING
Never use a cutting blade that shows signs of
excessive wear or damage. Refer to Section on
MOWER BLADE REPAIR/REPLACEMENT for proper
blade inspection and service procedures.
4.1 MOWER BLADE REPAIR/REPLACEMENT
4.1.1. STANDARD BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive wear
or damage. See Figure 4.1.
4.1.3. BLADE SHARPENING
1. Disconnect spark plug wire and secure end away
from plug.
NEW
WEAR LIMIT
BLADE
IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from crankcase will saturate the air
filter and cause the engine to be hard to start or not start at
all. If contamination does occur, the air filter will have to be
replaced.
(NOTCH STARTS)
DANGEROUS
CONDITION!
DO NOT USE ON
MOWER! REPLACE
WITH NEW BLADE.
2. Tilt mower up on its rear wheels.
3. Remove blade. See Figure 4.3.
MAKE SURE THAT
BLADE HUB IS
SEATED BETWEEN
FLANGES
HUB
BLADE
FIGURE 4.1
FLANGE
4.1.2.
NINJA BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive wear
or damage. See Figure 4.2.
WEAR LIMIT. CRACKS
NEW BLADE
BLADE
OR NOTCHES BEGIN
TO APPEAR ON TIP.
CONE WASHER
(Concave Side Up)
CAPSCREW
FIGURE 4.3
DANGEROUS!
DO NOT USE A BLADE IN
THIS CONDITION!
FIGURE 4.2
11
Section 4 - ADJUSTMENTS & REPAIR
WARNING
CLUTCH CABLE
VINYL SPRING COVER
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
CLUTCH
CABLE EYE
1/16” TO 1/8”
CLEARANCE
UPPER
SPRING
LOWER
SPRING
4. Sharpen blade on a grinding wheel at an angle of
22 to 28 degrees. DO NOT sharpen blade beyond
original cutting edge. See Figure 4.4.
SPRING HOOK
DO NOT SHARPEN
BEYOND ORIGINAL
CUTTING EDGE
22 TO 28º
CABLE
CLUTCH CABLE EYE
BLADE TIP
SPRING
END VIEW OF
BLADE ASSEMBLY
ORIGINAL CUTTING EDGE
FIGURE 4.5
2. To adjust, unhook upper spring from cable eye
and rotate spring in direction required to extend or
shorten spring length.
3. Rehook upper spring to cable eye and check
clearance. Repeat procedure if required.
FIGURE 4.4
5. Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6. Reinstall blade. Refer to Figure 4.1. Check torque
of blade retaining cap screw. Recommended torque
should be 30 to 40 ft. lbs.
NOTE: The vinyl spring cover should be kept over the
spring at all times except for adjustments.
NOTE: The following sections 4.2 through
4.4 are for self-propelled models only.
4. If the wheel drive control fails to return quickly to
the “OFF” position when released, check for binding
at the cable holdings located on the side of the right
handle. The upper clip should be located 2” below
the upper knob; the lower clip should be 4” above
the lower knob. The cable should slide freely with
the clips installed at these locations.
4.2 WHEEL DRIVE CONTROL ADJUSTMENT
1. The wheel drive control is properly adjusted when
there is 1/16” to 1/8” clearance between the inside of
the spring hook and the inside of the clutch cable
eye with the wheel drive control released. See
Figure 4.5.
12
Section 4 - ADJUSTMENTS & REPAIR
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
USE NEEDLE
NOSE PLIERS
TO INSTALL
DRIVE SPRING
4.3 DRIVEN DISC SERVICE
If the mower does not propel itself properly, refer to
Figure 4.6. Check for the following problems:
DRIVEN DISC &
RUBBER RING
POLY-V-BELT
DRIVE
SPRING
DRIVE
SPRING
ENGINE
DRIVE
BELT
DRIVE
DISC
FIGURE 4.7
4.3.3. DRIVEN DISC ADJUSTMENT
If the drive disc and driven disc are clean and the
mower drive is not making correct drive disc and driven
disc contact, adjust the driven disc as follows:
FIGURE 4.6
1. Grease on drive disc causing slippage.
2. Broken or disconnected drive spring.
3. Driven disc is out of adjustment.
4. Driven disc rubber ring is worn - does not contact
drive disc properly.
1. Place ground speed control in the number six
speed position. See Figure 4.8.
MOVE GROUND SPEED
CONTROL TO SIX SPEED
POSITION
5. Worn Poly-V Belt or engine drive belt.
NOTE: If any of the above (1 thru 5) are causing
problems, service as follows:
SIXTH SPEED
POSITION
4.3.1. Cleaning Drive Disc & Driven Disc.
If oil or grease on the drive disc or driven disc is
causing slippage, clean discs as follows:
SIXTH
1. Wipe away any oil or grease with a clean cloth.
2. Use either an approved grease solvent or hot,
soapy water to clean drive disc or driven disc.
3. Rinse components with clean water.
FIRST SPEED
POSITION
FIRST
4. Dry components with a clean cloth.
4.3.2. Drive Spring Repair/Replacement
If drive spring is loose, reconnect as shown in Figure
4.7. If spring is broken, replace with new spring.
IMPORTANT: If machine drive system continues
slipping see Trouble Shooting section.
FIGURE 4.8
(Continued on Next Page)
13
Section 4 - ADJUSTMENTS & REPAIR
1/8” MEASUREMENT TO
OUTSIDE EDGE OF
DRIVE DISC
WARNING
SLIDE DRIVEN
DISC ASSEMBLY
TOWARD
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
OUTSIDE EDGE
DRIVE
DISC
4.3.3. DRIVEN DISC ADJUSTMENT
(Continued From Previous Page)
2. Remove driven disc spring from driven disc
assembly. Loosen connector hex nut. See Figure 4.9.
TRANSFER
ROD
DRIVEN DISC ASSEMBLY
DRIVE
DISC
CONNECTOR HEX NUT
OUTSIDE
EDGE
CONNECTOR
DRIVEN
DISC
SPRING
TRANSFER
ROD
FIGURE 4.10
CONNECTOR
CONNECTOR
CLIP
CONNECTOR
HEX NUT
FIGURE 4.9
3. Slide driven disc assembly over to 1/8” from outside
edge of drive disc. Maintaining the 1/8” measurement,
remove any looseness from the linkage. This can be
done by holding the transfer rod and applying pressure
to the left (as viewed from operators position). Then
retighten the connector hex nut securely. See Figure
4.10. Move ground speed control to the first speed
position, then back to the sixth speed position.
Recheck the 1/8” measurement described previously.
Reinstall driven disc spring to driven disc assembly.
TRANSFER ROD
SPEED CONTROL
ROD
FIGURE 4.11
4.3.4. Replacing Rubber Driven Disc Ring
(Commercial Model)
If the rubber ring is badly chunked or worn down to
within 1/16” of the metal rim of the driven disc hub, it
must be replaced. Install new rubber ring as follows:
1. Using a small flat blade screwdriver, free the clip
from the transfer rod. Then remove the transfer rod
from the clip and the speed control rod. See Figure
4.11.
14
Section 4 - ADJUSTMENTS & REPAIR
4.3.5. Replacing Rubber Driven Disc
WARNING
(Non-Commercial Model)
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
If the rubber driven disc is badly chunked or worn
down, it must be replaced. Install new rubber driven
disc as follows:
1. Using a small flat blade screwdriver, free the clip
from the transfer rod. Then remove the transfer rod
from the clip and the speed control rod. Refer to Figure
4.11.
2. Using needle nose pliers, unhook the drive spring
and slide the driven disc assembly off the hex shaft.
Refer to Figure 4.12.
3. Remove the two retaining rings which secure the
rubber driven disc to the driven disc assembly. See
Figure 4.14.
4. Install new rubber driven disc onto driven disc
assembly with retaining rings.
4.3.4. Replacing Rubber Driven Disc Ring
(Commercial Model)
2. Using needle nose pliers, unhook the drive spring
and slide the driven disc assembly off the hex shaft.
See Figure 4.12.
3. Remove the five machine screws and plate which
secure the rubber driven disc ring to the driven disc
hub. See Figure 4.13.
4. Install new rubber driven disc ring.
5. Reverse above procedures for reassembly and
installation.
5. Reverse above procedures for reassembly and
installation of driven disc assembly.
DRIVEN DISC
ASSEMBLY
INSTALL NEW
DRIVEN DISC
SNAP
RINGS
FIGURE 4.12
DRIVEN DISC
FIGURE 4.14
MACHINE
HUB
SCREWS
RUBBER
RING
PLATE
FIGURE 4.13
15
Section 4 - ADJUSTMENTS & REPAIR
4.3.6. Replacing Bearing In Driven Disc Assembly
(Commercial Models)
4. Slide the rubber driven disc hub out of the
bearing.
If the driven disc bearing fails, remove the driven disc
assembly and replace bearing as follows:
1. Using a small flat blade screwdriver, free the clip
from the transfer rod. Then remove the transfer rod
from the clip and the speed control rod. Refer to Figure
4.11.
5. Drive out existing bearing.
6. Install new bearing and secure to thrust plate
with four retaining screws. Tighten screws securely.
7. Reassemble components in reverse order.
2. Using needle nose pliers, unhook the drive spring
and slide the driven disc assembly off the hex shaft.
Refer to Figure 4.12.
3. Remove snap ring that secures driven disc hub
to thrust plate. See Figure 4.15.
4. Slide the driven disc hub out of the bearing.
5. Remove the four screws that secure bearing.
6. Remove bearing and replace with new bearing
and secure with four retaining screws.
INSTALL
NEW
BEARING
7. Reassemble components in reverse order.
TIGHTEN
THE FOUR
SCREWS
SHIM
WASHER
SNAP
RING
THRUST
PLATE
SNAP RINGS
BEARING
REMOVE
FOUR
MACHINE
SCREWS
REINSTALL
DRIVEN
DISC
FIGURE 4.16
DRIVEN
DISC HUB
RUBBER
DISC
DRIVEN
DISC
PLATE
FIGURE 4.15
4.3.7. Replacing Bearing In Driven Disc Assembly
(Non-Commercial Models)
IMPORTANT: The bearing, on these “M” series Non-
Commercial machines, is staked into the thrust plate.
The bearing will have to be driven out with a mallet and a
large punch. A new bearing with four retaining screws
will have to be purchased to replace existing bearing.
If the driven disc bearing fails, remove the driven
disc assembly and replace bearing as follows:
1. Using a small flat blade screwdriver, free the clip
from the transfer rod. Then remove the transfer rod
from the clip and the speed control rod. Refer to Figure
4.11.
2. Using needle nose pliers, unhook the drive spring
and slide the driven disc assembly off the hex shaft.
Refer to Figure 4.12.
3. Remove both snap rings that secure rubber
driven disc hub to thrust plate. See Figure 4.16.
16
Section 4 - ADJUSTMENTS & REPAIR
4.4.1. Engine Drive Belt Replacement
(Standard and Stretch Type Belts)
1. Empty the fuel tank.
2. Standard Belt: Unhook the idler spring from the
right rear wheel bracket. See Figures 4.18.
2.A. Stretch Belt: Proceed to Step 3. There is no idler
pulley on these models to disconnect. See Figure
4.18A.
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug.
4.3.8. Replacement Of Bearing On Pulley End Of Hex
Shaft
To replace the bearing on the pulley end of the hex
shaft, proceed as follows:
1. Hold the hex shaft with an adjustable wrench
held next to the pulley.
2. Remove the 3/8” hex lock nut which is located at
the end of the hex shaft on the outside of the right
wheel bracket. See Figure 4.17.
RIGHT REAR WHEEL
BRACKET
IDLER
SPRING
SLOT IN
DECK
IDLER
ARM
3. Remove holder, O-ring and bearing.
4. Install new bearing.
5. Carefully install new O-ring over the outside of the
new bearing.
6. Install bearing holder and secure with screws.
7. Install 3/8” hex lock nut.
DRIVE DISC
DRIVE BELT
ENGINE DRIVE PULLEY
TOP VIEW OF ENGINE WITH STANDARD TYPE BELT ROUTING
FIGURE 4.18
DRIVE BELT
ENGINE DRIVE
PULLEY
BALL BEARING
“O” RING
3/8”
LOCK
NUT
DRIVE DISC
BALL
BEARING
HOLDER
FIGURE 4.17
4.4. BELT SERVICE
On self-propelled mowers, the engine belt transmits
power from engine to drive disc. The drive disc powers
the poly-v belt which engages the transmission that
powers the rear wheels. Should these belts become
worn, they could cause slippage which would impair
mower performance. The condition of the engine belt
and poly-v belt should be checked after every 25 hours
of mower operation.
TOP VIEW OF ENGINE WITH STRETCH TYPE BELT ROUTING
FIGURE 4.18A
(Continued on Next Page)
17
Section 4 - ADJUSTMENTS & REPAIR
6. Remove the belt cover located under deck.
7. Standard Belt: Lift the drive disc off the idler
arm and remove worn belt.
7.A. Stretch Belt: Lift the drive disc up and remove
worn belt.
8. Loop one end of new belt over engine pulley and
insert the other end through slot in deck. Refer to
Figure 4.18 & 4.18A.
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Wear
heavy leather gloves when handling or working around
cutting blades. Blades are extremely sharp and can
cause severe injury. Never use a cutting blade that
shows signs of excessive wear or damage.
STRETCH BELT PULLEY POSITION
4.4.1. Engine Drive Belt Replacement
(Standard and Stretch Type Belts)
(Continued From Previous Page)
DRIVE DISC
IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from crankcase will saturate the air
filter and cause the engine to be hard to start or not start
at all. If contamination does occur, the air filter will have to
be replaced.
SLOT IN END
OF DRIVE DISC
BOLT
BUSHING
3. Remove the driven disc. Refer to Section on
“Replacing Rubber Driven Disc Ring” for driven disc
assembly removal procedure.
4. Tilt mower up on its rear wheels and remove
blade and blade hub. Assistance from another
person may be necessary to hold mower in the
tilted position.
5. Hold the slotted end of the drive disc bolt with a
screwdriver and remove the nut and internal tooth
lock washer. See Figure 4.19.
DECK BRACKET
(PARTIALLY SHOWN)
BOLT RETAINER
INTERNAL TOOTH
LOCKWASHER
NUT
STANDARD BELT PULLEY POSITION
FIGURE 4.19
9. Loop the belt around the pulley on the bottom of
the drive disc.
DRIVE DISC
10. Reinstall drive disc and retaining hardware.
IMPORTANT: 1) The square shoulder of the drive
disc bolt must fit into the square hole of the
bushing. 2) The square end of bushing must fit into
the bracket slot.
SLOT IN END
OF DRIVE DISC
BOLT
POSITION
SCRAPER TO
11. Reinstall belt cover and tighten bolts securely.
12. Reinstall blade hub and cutter blade.
Recommended torque for blade cap screw is 30 to 40 ft.
lbs.
CLEAR “V” OF
PULLEY
BUSHING
(Continued On Next Page)
IDLER
ARM
BOLT RETAINER
IDLER
SPRING
INTERNAL TOOTH
LOCKWASHER
DECK BRACKET
(PARTIALLY SHOWN)
NUT
FIGURE 4.19
18
Section 4 - ADJUSTMENTS & REPAIR
IDLER
PULLEY
WARNING
DRIVE
PULLEY
Before attempting any adjustments or repairs, STOP
DIFFERENTIAL
BRACKET
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Wear
heavy leather gloves when handling or working around
cutting blades. Blades are extremely sharp and can
POLY-V
BELT
cause severe injury. Never use a cutting blade that
shows signs of excessive wear or damage.
HEX SHAFT
4.4.1. Engine Drive Belt Replacement
(Standard and Stretch Type Belts)
(Continued From Previous Page)
13. Standard Belt: Use a stiff wire, such as a coat
hanger, with a hook fashioned on one end to pull the
hooked end of the idler spring through the large hole
in the right wheel bracket. See Figure 4.20.
14. Reinstall the driven disc assembly.
BELT GUIDE
DRIVEN
PULLEY
ROUTING OF POLY-V-BELT
FIGURE 4.21
3. Place new Poly-V Belt over end of hex shaft and
onto driven pulley.
4. Work belt onto top of idler pulley.
IDLER
SPRING
5. Twist belt sideways and pull it upward between
the differential bracket and drive pulley and then
down into the pulley groove. Make sure the Poly-V
Belt is above belt guide. See Figure 4.21.
RIGHT
WHEEL
BRACKET
PULL SPRING THROUGH
LARGE HOLE & HOOK INTO
SMALL HOLE
FIGURE 4.20
4.4.2. Transmission Poly-V Belt Replacement
1. Remove the driven disc. Refer to Section on
“Replacing Driven Disc Rubber Ring” for procedure.
2. Note the routing of the old belt around the three
pulleys before removing it. See Figure 4.21.
19
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSE
CORRECTIVE ACTION
1. Fill fuel tank with fresh fuel.
1. Fuel tank empty.
Engine Will Not Start
Using Recoil Starter
2. Engine needs choking or priming.
2.Choke/Prime. Check Engine Manual for
Instructions.
3. Spark plug wire disconnected.
3. Place spark plug wire onto spark plug.
1. Blade control is released or is not being held securely 1. Blade control should be held securely against
Engine Stalls or Stops
After Running
against handle.
2. Choke control in the “CHOKE” position.
3. Fuel tank empty.
handle at all times during operation of mower.
2. Move choke control to “OFF” position.
3. Fill with fuel to proper level.
4. Clean free of all debris.
4. Engine air pre-cleaner and or air cleaner dirty.
5. Spark plug defective or gap set improperly.
6. Water, debris or stale fuel in fuel system.
5. Service spark plug.
6. Drain and clean fuel system.
1. Engine air pre-cleaner or air cleaner dirty
1. Clean or replace filters.
Engine Loses Power
Excessive Vibration
2. Spark plug faulty.
3. Water, debris or stale fuel in fuel system.
2. Service spark plug.
3. Drain and clean fuel system.
1. Damaged, out of balance or bent mower blade.
2. Loose blade components.
1. Service mower blade.
2. Service and tighten loose parts.
3. Replace air lifts. Tighten to proper torque.
4. Replace belt.
3. Loose or missing air lift (if equipped).
4. Lumpy or frayed belt
5. Bent Idler pulley
5. Replace pulley.
1. Damaged transmission
Mower Will Not Move
Loss Of Traction
1. Contact authorized SNAPPER dealer.
2. Replace engine drive belt.
3. Reinstall belt onto pulley. Check for damage.
4. Replace Poly-V belt.
2. Engine drive belt broken requires replacement
3. Engine drive belt has jumped off of the pulley
4. Poly V belt is broken.
(Self-Propelled Models)
5. Poly V belt has jumped off of the pulley
6. Driven disc slipping
5. Reinstall belt onto pulley. Check for damage.
6. Clean or replace driven disc.
7. Broken or loose differential link bolt
1. Cutting height too low or high.
2. Engine speed too slow.
7. Tighten or replace link bolt.
1. Adjust cutting height.
Cutting Grass
Improperly
2. Move engine speed control to “FAST” position.
3. Move ground speed control to a slower speed.
4. Adjust height of cut with height adjust levers.
5. Adjust height of cut with height adjust levers.
6. Sharpen cutting edges or replace blade.
1. Move engine speed control to “FAST” position.
2. Move ground speed control to a slower speed.
3. Mow when grass is dry.
3. Forward ground speed too fast.
4. Terraced cut, side to side.
5. Excessive deck pitch, front to rear.
6. Cutting blade dull or damaged.
1. Engine speed too slow.
Poor Grass Discharge
2. Forward speed too fast.
3. Grass is wet.
4. Excessively worn or damaged blade.
5. Build up of grass clippings and debris under deck.
6. Improper blade installed on deck.
7. Blade installed improperly on deck.
1. Leaking engine case.
4. Service mower blade.
5. Clean deck.
6. Install proper SNAPPER blade.
7. Install blade properly.
Oil Leaking
1. Contact authorized SNAPPER dealer.
2. Check and tighten drain plug.
3. Make sure dip stick or oil filler cap is securely
in place.
20
SERVICE SCHEDULE
ITEM
SERVICE PERFORMED
REF.
Page 11
EACH
USE
5
HRS
25
HRS
50
HRS
100
HRS
EACH
SEASON
Check Oil Level
Engine Oil
X
Initial Oil Change
Periodic Oil Change
Page 14
Page 15
X
X*
Clean Sponge Element
Clean or Replace
Replace
Engine Manual
& Page 15.
Engine Manual.
Air Pre-Cleaner
Air Cleaner
X**
X**
Engine Manual.
Engine Manual
Spark Plug
X
Clean Shroud & Fins
Engine Cooling
System
X**
Check For Wear And
Tension
Check For Wear, Damage Page 16-17
& Replacement
Clean Debris
Accumulation
Page 15, 22-23
Drive Belts
X
X
X
X
Mower Blade
Mower Deck
X
X
Page 15
Check Grease Level
Pages 14-15
Transmission
Grease
X
X
Periodic Grease Check
Pages 14-15
Check for Wear Damage Page 18-21
& Replacement
Drive Disc
X
* Change oil every 25 hours when operating under heavy load or high temperatures.
**Clean more often under dusty conditions or when air debris is present
4.5.
MAINTENANCE/REPLACEMENT PARTS
MAINTENANCE PARTS
Engine Speed Control (Commercial Model Only)
Engine Speed Control(Swivel Wheel Model Only)
Blade Control Cable (Commercial Model Only)
Blade Control Cable (Push & Propelled Models)
Blade Control Cable (Swivel Wheel Model Only)
Swivel Lock Control Cable (Swivel Wheel Model Only)
Clutch Pull Cable (Propelled Models)
4-1965
2-6467
4-1966
4-1971
4-6702
4-6669
2-3134
4-1939
2-6407
1-2354
1-2353
4-6784
Cutter Blade (Mulching)
Cutter Blade (Ninja - Quad Edge)
Wheel Drive Pulley to Transmission Pulley Belt
Engine to Drive Disc Belt
* Engine to Drive Disc Stretch Type Belt
(MRP216014B Model Only)
Rubber Drive Tire (Commercial Model)
Rubber Drive Tire (Non-Commercial Model)
Parts Manual for 21” Steel Deck Walk Behind Mower
“M” Series 14 & 15
1-0927
4-1855
06064
* IMPORTANT: This stretch belt should be used only on models without idler pulleys.
21
3 YEAR LIMITED WARRANTY
For three (3) years from purchase date for the original purchaser's residential, non-commercial use, SNAPPER, through
any authorized SNAPPER dealer will replace, free of charge (except for taxes where applicable), any part or parts found
upon examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
For ninety (90) days from purchase date for the original purchaser's commercial, rental, or other non-residential use,
SNAPPER, through any authorized SNAPPER dealer will replace, free of charge, any part or parts found upon
examination by the factory at McDonough, Georgia, to be defective in material or workmanship or both.
All transportation costs incurred by the purchaser in submitting material to an authorized SNAPPER dealer for
replacement under this warranty must be paid by the purchaser.
This warranty does not apply to engines and their components, and batteries, as these items are warranted separately.
This warranty does not apply to parts that have been damaged by accident, alteration, abuse, improper lubrication,
normal wear, or other cause beyond the control of SNAPPER. This warranty does not cover any machine or component
part that has been altered or modified changing safety, performance, or durability.
Batteries have a one (1) year prorated warranty period with free replacement if required during the first ninety (90) days
from the original purchase date. SNAPPER will not be responsible for any installation cost incurred. The battery warranty
only covers original equipment batteries and does not cover damage to the battery or machine caused by neglect or
abuse, destruction by fire, explosion, freezing, overcharging, improper maintenance, or use of improper electrolyte.
There is no other express warranty.
DISCLAIMER OF WARRANTY
Implied warranties, including those of merchantability and fitness for a particular purpose, are limited to three
(3) years from purchase date for the original purchaser's residential or other non-commercial use, and ninety
(90) days from purchase for the original purchaser's commercial, rental or other non-residential use, and to the
extent permitted by law, any and all implied warranties are excluded. This is the exclusive remedy. Liabilities for
consequential damages, under any and all warranties are excluded.
Some states do not allow limitations on how long an implied warranty lasts, or do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
WARNING: THE USE OF REPLACEMENT PARTS OTHER THAN GENUINE SNAPPER PARTS MAY IMPAIR THE
SAFETY OF SNAPPER PRODUCTS AND WILL VOID ANY LIABILITY AND WARRANTY BY SNAPPER
ASSOCIATED WITH THE USE OF SUCH PARTS.
IMPORTANT: Please fill out the attached SNAPPER Product Registration Card immediately and mail to:
Snapper’s Product Registration Center, P.O. Box 1379, McDonough, Georgia 30253
22
PRIMARY MAINTENANCE
23
PRIMARY MAINTENANCE
24
PRIMARY MAINTENANCE
25
PRIMARY MAINTENANCE
26
NOTES
27
NOTES
28
Safety Instructions & Operator’s Manual for
21” STEEL DECK
WALK BEHIND MOWERS
“M” MODEL
SERIES 14
The engine exhaust from this product contains chemicals known to the State
of California to cause cancer, birth defects or other reproductive harm.
WARNING:
COPYRIGHT © 1999
SNAPPER INC.
ALL RIGHTS RESERVED
MANUAL No. 4-1936 (REV. 3, 9/20/99)
29
|