Form No. 3379-226 Rev A
21in Mulching/Rear Bagging Lawn
Mower
Model No. 10730—Serial No. 314000001 and Up
Model No. 10732—Serial No. 314000001 and Up
Model No. 10734—Serial No. 314000001 and Up
Model No. 17730—Serial No. 314000001 and Up
Model No. 17732—Serial No. 314000001 and Up
Model No. 17734—Serial No. 314000001 and Up
Operator's Manual
Receive a free side-discharge chute by
completing the Discharge Chute Order
Form when you register your product at
weeks for delivery.
Model No.
Introduction
This rotary-blade, walk-behind lawn mower is intended
to be used by residential homeowners. It is designed
primarily for cutting grass on well-maintained lawns
on residential properties. It is not designed for cutting
brush or for agricultural uses.
Serial No.
This manual identifies potential hazards and has safety
which signals a hazard that may cause serious injury or death
if you do not follow the recommended precautions.
Read this information carefully to learn how to operate and
maintain your product properly and to avoid injury and
product damage. You are responsible for operating the
product properly and safely.
You may contact Lawn-Boy directly at www.Lawn-Boy.com
for product and accessory information, help finding a dealer,
or to register your product.
Figure 2
1. Safety alert symbol
Whenever you need service, genuine Lawn-Boy parts, or
additional information, contact an Authorized Service Dealer
or Lawn-Boy Customer Service and have the model and
location of the model and serial numbers on the product.
Write the numbers in the space provided.
This manual uses 2 words to highlight information.
Important calls attention to special mechanical information
and Note emphasizes general information worthy of special
attention.
Figure 1
1. Model and serial number plate
© 2013—Lawn-Boy® Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420
Original Instructions (EN)
Printed in the USA
All Rights Reserved
*3379-226*
A
•
•
•
Be sure the area is clear of bystanders before operating.
Stop machine if anyone enters the area.
Children
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the
machine and the mowing activity. Never assume that children
will remain where you last saw them.
Do not operate machine barefooted or while wearing
sandals. Always wear substantial footwear.
Do not pull machine backward unless absolutely
necessary. Always look down and behind before and
while moving backward.
•
Keep children out of the mowing area and under the
watchful care of a responsible adult other than the
operator.
•
•
Never direct discharged material toward anyone. Avoid
discharging material against a wall or obstruction.
Material may ricochet back toward the operator. Stop the
blade when crossing gravel surfaces.
•
•
•
Be alert and turn mower off if a child enters the area.
Never allow children to operate the machine.
Do not operate machine without the entire grass catcher,
discharge guard, rear guard, or other safety protective
devices in place and working.
Use extra care when approaching blind corners, shrubs,
trees, or other objects that may block your view of a child.
•
•
Never leave a running machine unattended.
Service
Stop the engine and wait until the blade comes to a
complete stop before cleaning the machine, removing
grass catcher, or unclogging the discharge guard.
Safe Handling of Gasoline
•
•
Operate machine only in daylight or good artificial light.
To avoid personal injury or property damage, use
extreme care in handling gasoline. Gasoline is extremely
flammable and the vapors are explosive.
Do not operate the machine while under the influence
of alcohol or drugs.
•
•
•
Never operate the mower in wet grass. Always be sure of
your footing; walk; never run.
•
Extinguish all cigarettes, cigars, pipes, and other sources
of ignition.
Disengage the drive system, if so equipped, before
starting the engine.
•
•
Use only an approved gasoline container.
Never remove the gas cap or add fuel with the engine
running. Allow the engine to cool before refueling.
If the machine should start to vibrate abnormally, stop
the engine and check for the cause immediately. Vibration
is generally a warning of trouble.
•
•
Never refuel the machine indoors.
•
•
Always wear eye protection when operating the machine.
Never store the machine or fuel container where there is
an open flame, spark, or pilot light, such as on a water
heater or on other appliances.
Lightning can cause severe injury or death. If you see
lightning or hear thunder in the area, do not operate the
machine; seek shelter.
•
•
Never fill containers inside a vehicle or on a truck or
trailer bed with a plastic liner. Always place containers on
the ground away from your vehicle before filling.
•
See the manufacturer's instructions for proper operation
and installation of accessories. Use only accessories
approved by the manufacturer.
Remove gas-powered equipment from the truck or trailer
and refuel it on the ground. If this is not possible, then
refuel such equipment with a portable container rather
than from a gasoline dispenser nozzle.
Slope Operation
Slopes are a major factor related to slip-and-fall accidents,
which can result in severe injury. Operation on all slopes
require extra caution. If you feel uneasy on a slope, do not
mow it.
•
Keep the 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.
•
•
If fuel is spilled on clothing, change clothing immediately.
•
Mow across the face of slopes; never up and down.
Exercise extreme caution when changing direction on
slopes.
Never overfill fuel tank. Replace the gas cap and tighten
it securely.
•
Watch for holes, ruts, bumps, rocks, or other hidden
objects. Uneven terrain could cause a slip-and-fall
accident. Tall grass can hide obstacles.
WARNING
Exhaust contains carbon monoxide, an odorless,
deadly poison that can kill you.
•
•
Do not mow on wet grass or excessively steep slopes.
Poor footing could cause a slip-and-fall accident.
Do not run the engine indoors or in an enclosed
area.
Do not mow near drop-offs, ditches, or embankments.
You could lose your footing or balance.
3
•
•
•
•
Mower blades are sharp. Wrap the blade or wear gloves,
and use extra caution when servicing them.
General Service
•
Never operate the machine in a closed area.
Do not change the engine governor setting or overspeed
the engine.
•
Keep all nuts and bolts tight to be sure the equipment is
in safe working condition.
Maintain or replace safety and instruction labels, as
necessary.
•
•
Never remove or tamper with safety devices. Check their
proper operation regularly. Never do anything to interfere
with the intended function of a safety device or to reduce
the protection provided by a safety device.
To best protect your investment and maintain optimal
performance of your Lawn-Boy equipment, count on
Lawn-Boy genuine parts. When it comes to reliability,
Lawn-Boy delivers replacement parts designed to the
exact engineering specifications of our equipment. For
peace of mind, insist on Lawn-Boy genuine parts.
Keep the machine free of grass, leaves, or other debris
buildup. Clean up oil or fuel spillage and remove any
fuel-soaked debris. Allow the machine to cool before
storing it.
•
•
•
If you strike a foreign object, stop and inspect the
machine. Repair the machine, if necessary, before starting
it.
Hauling
•
•
•
Use care when loading or unloading the machine into a
trailer or truck.
Never make any adjustments or repairs with the engine
running. Disconnect the spark-plug wire and ground
against the engine to prevent unintended starting.
Use full-width ramps for loading the machine into a
trailer or truck.
Check grass catcher components and the discharge
guard frequently, and replace them with manufacturer's
recommended parts, when necessary.
Tie the machine down securely using straps, chains, cable,
or ropes. Both the front and the rear straps should be
directed down and outward from the machine.
Safety and Instructional Decals
Important: Safety and instruction decals are located near areas of potential danger. Replace damaged decals.
Manufacturer's Mark
1. Indicates that the blade is identified as a part from the
original machine manufacturer.
94-8072
104-7953 (Electric-start models only)
1. Warning—read the Operator's Manual for information on charging the battery; contains lead; do not discard.
2. Read the Operator's Manual.
4
117–2718
117-4143
1. Warning—read the Operator's Manual.
2. Thrown object hazard—keep bystanders a safe distance
from the machine.
3. Cutting/dismemberment hazard of hand or foot, mower
blade—disconnect the spark-plug wire and read the
instructions before servicing or performing maintenance.
4. Cutting/dismemberment hazard of hand or foot, mower
blade—stay away from moving parts and keep all guards
and shields in place.
5. Cutting/dismemberment hazard of hand or foot, mower
blade—do not mow up and down slopes, only mow across;
stop the mower and engine, pick up debris before operating;
look behind and down when reversing.
5
Installing the Recoil-starter
Rope in the Rope Guide
Setup
Important: Remove and discard the protective plastic
Important: To start the engine safely and easily
whenever you use the machine, install the recoil-starter
rope in the rope guide.
sheet that covers the engine.
Unfolding the Handle
Hold the blade-control bar to the upper handle and pull the
recoil-starter rope through the rope guide on the handle
WARNING
Folding or unfolding the handle improperly can
damage the cables, causing an unsafe operating
condition.
• Do not damage the cables when folding or
unfolding the handle.
• If a cable is damaged, contact an Authorized
Service Dealer.
1. Remove the handle knobs from the machine housing
Figure 4
1. Recoil-starter rope
2. Rope guide
Important: Route the cables to the outside of the
handle as you install the handle.
Filling the Engine with Oil
Important: Your machine does not come with oil in
the engine. Before starting the engine, fill the engine
with oil.
1. Move the machine to a level surface.
the crankcase capacity of oil into the oil-fill tube.
Note: Max. fill: 0.65 L (22 oz), type: 10W-30 or SAE
30 detergent oil with an API service classification of
SJ or higher.
Figure 3
1. Handle knob (2)
3. Install the handle knobs and tighten them firmly by
hand.
Figure 5
Engine for electric-start models not shown
3. Wipe off the dipstick with a clean cloth.
6
4. Insert the dipstick into the oil-fill tube, but do not
Product Overview
screw it in.
5. Remove the dipstick and read the oil level on the
•
•
If the oil level is low, add a small amount of oil
slowly to the oil-fill tube, and then repeat steps
3 through 5 until the oil level on the dipstick is
correct.
If the oil level is high, drain the excess oil until the
oil level on the dipstick is correct. To drain the
13).
Important: If the oil level in the crankcase is
too low or too high and you run the engine,
you may damage the engine.
6. Install the dipstick securely.
Important: Change the engine oil after the first 5
operating hours; change it yearly thereafter. Refer
Figure 6
Charging the Battery
Electric-start model shown
(Electric-start models only)
Refer to Charging the Battery (Electric-start models only)
1. Self-propel-drive bar
(self-propel models only)
7. Ignition key (electric-start
models only)
2. Recoil-start handle
8. Battery (not shown;
electric-start models only)
(page 14).
3. Grass bag
9. Fuel-tank cap
10. Air filter
4. Oil fill/Dipstick
5. Cutting-height lever (2)
6. Blade-control bar
11. Spark plug
12. Battery charger
(electric-start models
only)
7
Operation
Attachments/Accessories
A selection of Lawn-Boy approved attachments and
accessories is available for use with the machine to enhance
and expand its capabilities. Contact your Authorized Service
Dealer or Distributor or go to www.Lawn-Boy.com for a list
of all approved attachments and accessories.
Filling the Fuel Tank
DANGER
Figure 7
Gasoline is extremely flammable and explosive. A
fire or explosion from gasoline can burn you and
others.
Checking the Engine-oil Level
• To prevent a static charge from igniting the
gasoline, place the container and/or machine
directly on the ground before filling, not in a
vehicle or on an object.
Service Interval: Before each use or daily
Max. fill: 0.65 L (22 oz), type: 10W-30 or SAE 30 detergent
oil with an API service classification of SJ or higher.
1. Move the machine to a level surface.
• Fill the tank outdoors when the engine is cold.
Wipe up spills.
• Do not handle gasoline when smoking or around
an open flame or sparks.
• Store gasoline in an approved fuel container, out
of the reach of children.
•
For best results, use only clean, fresh (less than 30 days
old), unleaded gasoline with an octane rating of 87 or
higher ((R+M)/2 rating method).
•
•
Oxygenated fuel with up to 10% ethanol or 15% MTBE
by volume is acceptable.
Ethanol: Gasoline with up to 10% ethanol (gasohol)
or 15% MTBE (methyl tertiary butyl ether) by volume
is acceptable. Ethanol and MTBE are not the same.
Gasoline with 15% ethanol (E15) by volume is not
approved for use. Never use gasoline that contains
more than 10% ethanol by volume, such as E15
(contains 15% ethanol), E20 (contains 20% ethanol), or
E85 (contains up to 85% ethanol). Using unapproved
gasoline may cause performance problems and/or engine
damage which may not be covered under warranty.
Figure 8
Engine for electric-start models not shown
3. Wipe off the dipstick end with a clean cloth.
4. Insert the dipstick into the oil-fill tube, but do not
screw it in.
5. Remove the dipstick and read the oil level; refer to
•
•
Do not use gasoline containing methanol.
•
If the oil level is low, add a small amount of oil
slowly to the oil-fill tube, and then repeat steps
3 through 5 until the oil level on the dipstick is
correct.
Do not store fuel either in the fuel tank or in fuel
containers over the winter unless a fuel stabilizer is used.
•
Do not add oil to gasoline.
•
If the oil level is high, drain the excess oil until the
oil level on the dipstick is correct. To drain the
13).
Important: To reduce starting problems, add fuel
stabilizer to the fuel all season, mixing it with gasoline
less than 30 days old.
8
Important: If the oil level in the crankcase is
too low or too high and you run the engine,
you may damage the engine.
Note: To raise or lower the machine, move the cutting-height
6. Install the dipstick securely.
Adjusting the Cutting Height
WARNING
Adjusting the cutting height may bring you into
contact with the moving blade, causing serious
injury.
Figure 10
• Stop the engine and wait for all moving parts
to stop.
1. Raise the machine
2. Lower the machine
• Do not put your fingers under the housing when
adjusting the cutting height.
Important: The cutting height settings are 32 mm
(1-1/4 inches); 44 mm (1-3/4 inches); 57 mm (2-1/4
inches); 70 mm (2-3/4 inches); 83 mm (3-1/4 inches);
and 95 mm (3-3/4 inches).
CAUTION
If the engine has been running, the muffler will be
hot and can severely burn you. Keep away from the
hot muffler.
Starting the Engine
handle.
Adjusting the Cutting Height
(High-wheel models only)
Adjust the cutting height as desired. Set the front wheels and
the rear wheels to the same height.
Note: To raise or lower the machine, move the cutting-height
Figure 11
1. Blade-control bar
2. Turn the ignition key (electric-start models only; refer
Figure 9
Figure 12
1. Raise the machine
2. Lower the machine
Important: The cutting height settings are 32 mm
(1-1/4 inches); 44 mm (1-3/4 inches); 57 mm (2-1/4
inches); 70 mm (2-3/4 inches); 83 mm (3-1/4 inches);
and 95 mm (3-3/4 inches).
Adjusting the Cutting Height
(Regular-wheel models only)
Adjust the cutting height as desired. Set the front wheels and
the rear wheels to the same height.
Figure 13
9
Note: If the machine does not start after several
attempts, contact an Authorized Service Dealer.
Mulching the Clippings
Your machine comes from the factory ready to mulch the
grass and leaf clippings back into the lawn.
Using the Self-propel Drive
(Self-propel models only)
If the grass bag is on the machine, remove it before mulching
To operate the self-propel drive, squeeze the self-propel drive
Bagging the Clippings
Use the grass bag when you want to collect grass and leaf
clippings from the lawn.
WARNING
A worn grass bag could allow small stones and other
similar debris to be thrown at you or in the direction
of bystanders, resulting in serious personal injury
or death to you or to bystanders.
Check the grass bag frequently. If it is damaged,
install a new Lawn-Boy replacement bag.
Figure 14
1. Self-propel drive bar
WARNING
The blade is sharp; contacting the blade can result
in serious personal injury.
To disengage the self-propel drive, release the self-propel
drive bar.
Stop the engine and wait for all moving parts to stop
before leaving the operating position.
Note: The maximum self-propel ground speed is fixed. To
reduce the ground speed, increase the space between the
self-propel drive bar and the handle.
Installing the Grass Bag
Stopping the Engine
Service Interval: Before each use or daily
Note: Remove the ignition key when you leave the machine
(electric-start models only).
Important: When you release the blade-control bar,
both the engine and blade should stop within 3 seconds.
If they do not stop properly, stop using your machine
immediately and contact an Authorized Service Dealer.
Figure 16
1. Rear deflector
3. Rod end (2)
4. Grass bag
2. Notch in the handle
bracket (2)
Figure 15
2. Insert the rod ends of the grass bag into the notches
3. Allow the rear deflector to rest on the bag.
10
– Set the cutting height on the front wheels one notch
lower than the rear wheels. For example, set the front
wheels at 57 mm (2-1/4 inches) and the rear wheels
at 70 mm (2-3/4 inches).
Removing the Grass Bag
2. Lift the grass-bag handle out from the notches on the
handle brackets and remove the bag from the machine.
3. Close the rear deflector.
Operating Tips
General Mowing Tips
•
•
•
Clear the area of sticks, stones, wire, branches, and other
debris that the blade could hit.
Avoid striking solid objects with the blade. Never
deliberately mow over any object.
If the machine strikes an object or starts to vibrate,
immediately stop the engine, disconnect the wire from
the spark plug, and examine the machine for damage.
•
•
For best performance, install a new blade before the
cutting season begins.
Replace the blade when necessary with a Lawn-Boy
replacement blade.
Cutting Grass
•
Cut only about a third of the grass blade at a time. Do not
cut below the 44 mm (1–3/4-inch) setting unless the grass
is sparse or it is late fall when grass growth begins to slow
•
When cutting grass over 15 cm (6 inches) tall, mow at the
highest cutting height setting and walk slower; then mow
again at a lower setting for the best lawn appearance. If
the grass is too long, the machine may plug and cause
the engine to stall.
•
Mow only dry grass or leaves. Wet grass and leaves tend
to clump on the yard and can cause the machine to plug
or the engine to stall.
WARNING
Wet grass or leaves can cause serious injury if
you slip and contact the blade. Mow only in dry
conditions.
•
•
Alternate the mowing direction. This helps disperse the
clippings over the lawn for even fertilization.
If the finished lawn appearance is unsatisfactory, try one
or more of the following:
– Replace the blade or have it sharpened.
– Walk at a slower pace while mowing.
– Raise the cutting height on your machine.
– Cut the grass more frequently.
– Overlap cutting swaths instead of cutting a full swath
with each pass.
11
Maintenance
Note: Determine the left and right sides of the machine from the normal operating position.
Recommended Maintenance Schedule(s)
Maintenance Service
Maintenance Procedure
Interval
• Change the engine oil.
After the first 5 hours
Before each use or daily
After each use
• Check the engine oil level.
• Ensure that the engine stops within 3 seconds after releasing the blade-control bar.
• Clean grass clippings and dirt from under the machine.
• Check the air cleaner for dirty, loose, or damaged parts, and clean or replace them
if necessary.
• Charge the battery for 24 hours (electric-start models only).
Every 25 hours
• Replace the air-cleaner element (more frequently when operating the machine in
dusty or dirty operating conditions).
• Clean the cooling system (refer to your engine owner's manual).
• Replace the spark plug.
Every 100 hours
Before storage
Yearly
• Empty the fuel tank before repairs as directed and before annual storage.
• Change the engine oil.
• Replace the blade or have it sharpened (more frequently if the edge dulls quickly).
• Refer to your Engine Operator's Manual for any additional yearly maintenance
procedures.
Important: Refer to your Engine Operator's Manual for additional maintenance procedures.
Preparing for Maintenance
Important: Before tipping the machine to change
the oil or replace the blade, allow the fuel tank to
run dry through normal usage. If you must tip
the machine prior to running out of fuel, use a
hand fuel pump to remove the fuel. Always tip the
machine onto its side with the dipstick down.
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the spark-plug wire from the spark plug
procedure.
WARNING
Tipping the machine may cause the fuel to
leak. Gasoline is flammable, explosive and
can cause personal injury.
Run the engine dry or remove the gasoline
with a hand pump; never siphon.
Figure 17
1. Spark-plug wire
3. After performing the maintenance procedure(s),
connect the spark-plug wire to the spark plug.
12
Servicing the Air Cleaner
Service Interval: Every 25 hours/Yearly (whichever comes
first)—Check the air cleaner for dirty,
loose, or damaged parts, and clean or
replace them if necessary.
Changing the Engine Oil
Service Interval: After the first 5 hours
Yearly
Run the engine a few minutes before changing the oil to warm
it. Warm oil flows better and carries more contaminants.
Every 100 hours/Yearly (whichever comes
first)—Replace the air-cleaner element (more
frequently when operating the machine in dusty or
dirty operating conditions).
1. Perform the pre-maintenance procedures; refer to
2. Tip the machine onto its side, with the dipstick down,
to drain the used oil out through the oil-fill tube (Figure
19).
1. Perform the pre-maintenance procedures; refer to
and open the cover.
Figure 19
3. Remove the dipstick.
4. After draining the used oil, return the machine to the
normal operating position.
5. Pour about 3/4 of the crankcase capacity of oil into
the oil-fill tube.
Note: Max. fill: 0.59 L (22 oz), type: 10W-30 or SAE
30 detergent oil with an API service classification of
SJ or higher.
Figure 18
6. Wipe off the dipstick end with a clean cloth.
1. Air-cleaner cover
2. Paper element
3. Air-cleaner housing
4. Button
7. Insert the dipstick into the oil-fill tube, but do not
screw it in.
8. Remove the dipstick and read the oil level on the
3. Remove the old paper element.
4. Install the new paper element in the air-cleaner housing,
not in the cover.
5. Install the air-cleaner cover.
Note: Ensure that the air-cleaner cover is fully latched
into place by pulling gently on the upper corners of the
cover. If the cover comes loose, repeat steps 4 and 5.
13
Figure 21
2. Plug the charger into a wall outlet.
Note: When the battery no longer holds a charge,
recycle or dispose of the lead-acid battery according
to local codes.
Figure 20
Engine for electric-start models not shown
Note: Your battery charger may have a 2-color LED display
that indicates the following states of charging:
•
•
•
A red light indicates that the charger is charging the
battery.
•
•
If the oil level is low, add a small amount of oil
slowly to the oil-fill tube, and then repeat steps
6 through 8 until the oil level on the dipstick is
correct.
A green light indicates that the charger is fully charged or
the charger is disconnected from the battery.
A flashing light that alternates between red and green
indicates that the battery is nearly fully charged. This state
lasts only a few minutes until the battery is fully charged.
If the oil level is high, drain the excess oil until the
oil level on the dipstick is correct.
Important: If the oil level in the crankcase is
too low or too high and you run the engine,
you may damage the engine.
Replacing the Fuse
(Electric-start models only)
Your machine comes with a fuse that protects the electric
starter. If the battery does not charge or the engine does not
run with the electric starter, the fuse may be blown. Replace
it with a 40-amp plug-in type fuse.
9. Install the dipstick securely.
10. Recycle the used oil properly.
Charging the Battery
(Electric-start models only)
Service Interval: Every 25 hours
Important: You cannot start the machine with the
electric starter or charge the battery unless you install
the fuse.
WARNING
CALIFORNIA
Proposition 65 Warning
Battery posts, terminals, and related
accessories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive harm.
Wash hands after handling.
Charge the battery for 24 hours initially, then monthly (every
25 starts) or as needed. Always use the charger in a sheltered
area and charge the battery at room temperature (70° or 22°
C) whenever possible.
Figure 22
1. Battery cover
2. Foam
3. Battery
1. Connect the charger to the wire harness located below
4. Fuse holder
14
Figure 23
3. Install the battery cover.
Replacing the Blade
Service Interval: Yearly
Important: You will need a torque wrench to install the
blade properly. If you do not have a torque wrench or
are uncomfortable performing this procedure, contact
an Authorized Service Dealer.
Figure 24
Examine the blade whenever you run out of gasoline. If the
blade is damaged or cracked, replace it immediately. If the
blade edge is dull or nicked, have it sharpened or replace it.
Important: Position the curved ends of the blade
to point toward the machine housing.
6. Use a torque wrench to tighten the blade bolt to 82
N-m (60 ft-lb).
WARNING
The blade is sharp; contacting the blade can result
in serious personal injury.
Important: A bolt torqued to 82 N-m (60 ft-lb) is
very tight. While holding the blade with a block
of wood, put your weight behind the ratchet or
wrench and tighten the bolt securely. This bolt is
very difficult to overtighten.
• Disconnect the wire from the spark plug.
• Wear gloves when servicing the blade.
1. Disconnect the spark-plug wire from the spark plug.
2. Tip the machine onto its side, with the air filter up.
3. Use a block of wood to hold the blade steady.
4. Remove the blade (turn the blade bolt
counterclockwise), saving all the mounting
hardware.
5. Install the new blade (turn the blade bolt clockwise)
15
Adjusting the Self-propel Drive Cleaning the Underside of the
Cable (Self-propel models
only)
Machine
Service Interval: After each use
Whenever you install a new self-propel cable or if the
self-propel drive is out of adjustment, adjust the self-propel
drive cable.
WARNING
The machine may dislodge material from under the
machine housing.
• Wear eye protection.
• Stay in the operating position (behind the
handle).
• Do not allow bystanders in the area.
1. With the engine running on a flat paved surface, spray a
stream of water in front of the right rear wheel (Figure
26).
The water will splash into the path of the blade,
cleaning out the clippings.
Figure 25
1. 25 to 38 mm (1 to 1-1/2
inches)
4. Cable-support nut
5. Cable support
Figure 26
2. Self-propel drive bar
3. Cable jacket
2. When no more clippings come out, stop the water and
move the machine to a dry area.
2. Hold the self-propel bail 25 to 38 mm (1 to 1-1/2
3. Run the engine for a few minutes to dry the housing
to prevent it from rusting.
3. Pull down the cable jacket (toward the machine) until
4. Tighten the nut on the cable support.
5. Release the self-propel drive bar and ensure that the
cable is loose.
Note: The cable must be loose with the self-propel
drive bar in the released position; otherwise, the
machine may creep when you disengage the bar.
16
Storage
Store the machine in a cool, clean, dry place.
Preparing the Machine for
Storage
WARNING
Gasoline vapors can explode.
• Do not store gasoline more than 30 days.
• Do not store the machine in an enclosure near
an open flame.
• Allow the engine to cool before storing it.
1. On the last refueling of the year, add fuel stabilizer to
the fuel as directed by the engine manufacturer.
Figure 27
2. Run the machine until the engine stops from running
out of fuel.
1. Handle knob (2)
3. Prime the engine and start it again.
4. Allow the engine to run until it stops. When you can
no longer start the engine, it is sufficiently dry.
5. Disconnect the wire from the spark plug.
Removing the Machine from
Storage
6. Remove the spark plug, add 30 ml (1 oz) of oil through
the spark plug hole, and pull the starter rope slowly
several times to distribute oil throughout the cylinder
to prevent cylinder corrosion during the off-season.
1. Remove the spark plug and spin the engine rapidly by
pulling the recoil-start handle to blow the excess oil
from the cylinder.
7. Install the spark plug and tighten it with a torque
wrench to 20 N-m (15 ft-lb).
2. Install the spark plug and tighten it with a torque
wrench to 20 N-m (15 ft-lb).
8. Tighten all nuts, bolts, and screws.
3. Charge the battery for 24 hours (electric-start models
only).
9. Charge the battery for 24 hours, then unplug the
battery charger an store the machine in an unheated
area. If you must store the machine in a heated area,
you must charge the battery every 90 days (electric-start
models only).
4. Connect the wire to the spark plug.
Folding the Handle
WARNING
Folding or unfolding the handle improperly can
damage the cables, causing an unsafe operating
condition.
• Do not damage the cables when folding or
unfolding the handle.
• If a cable is damaged, contact an Authorized
Service Dealer.
1. Loosen the handle knobs until you can move the
17
Notes:
18
Notes:
19
21 in. Mulching/Rear Bagging
Walk Power Mowers
The Lawn-Boy No-Worry Warranty
A 2-Year Full Warranty (45 Day Limited Warranty for Commercial Use)
The Lawn-Boy True Start Commitment
A 3-Year Full Warranty (Not Applicable for Commercial Use)
Conditions and Products Covered
Items and Conditions Not Covered
Lawn-Boy Inc. and its affiliate, Lawn-Boy Warranty Company, pursuant
to an agreement between them, jointly promise to repair the Lawn-Boy
Product listed below if used for residential purposes*; if it is defective in
materials or workmanship or if it stops functioning due to the failure of
a component; or if the Lawn-Boy True Start engine will not start on the
first or second pull, provided the routine maintenance required in the
Operator's Manual have been performed.
There is no other express warranty except for special emission system
coverage and engine warranty coverage on some products. This express
warranty does not cover the following:
•
Cost of regular maintenance service or parts, such as filters, fuel,
lubricants, oil changes, spark plugs, air filters blade sharpening
or worn blades, cable/linkage adjustments, or brake and clutch
adjustments
This warranty covers the cost of parts and labor, but you must pay
transportation costs.
•
•
Components failing due to normal wear
Any product or part which has been altered or misused or neglected
and requires replacement or repair due to accidents or lack of proper
maintenance
The following time periods apply from the date of purchase:
Products
Warranty Period
•
•
Pickup and delivery charges
21 in. Mulching/Rear Bagging
Mowers and Attachments
True Start Commitment
Engine
2 - year full warranty
Repairs or attempted repairs by anyone other than an Authorized
Lawn-Boy Service Dealer
3 - year full warranty
3 - year full warranty
1 - year full warranty
90 days
•
Repairs necessary due to failure to follow recommended fuel
procedure (consult Operator's Manual for more details)
Battery
Wear Items (Belts, blades, blade
adaptors, grass bags, cables, and
wheels)
–
–
Removing contaminants from the fuel system is not covered
Use of old fuel (more than one month old) or fuel which contains
more than 10% ethanol or more that 15% MTBE
Limited Warranty for Commercial Use*
–
Failure to drain the fuel system prior to any period of non-use
over one month
Gas-powered Lawn-Boy Products used for commercial, institutional, or
rental use, are warranted for 45 days against defects in materials or
workmanship. Components failing due to normal wear are not covered
by this warranty.
•
•
Repairs or adjustments to correct starting difficulties due to the
following:
–
Failure to follow proper maintenance procedures or
recommended fuel procedure
The True Start Commitment does not apply when the product is used
commercially*.
–
Rotary mower blade striking an object
Instructions for Obtaining Warranty Service
Special operational conditions where starting may require more than
two pulls:
If you think that your Lawn-Boy Product contains a defect in materials or
workmanship, or if a normal, able-bodied adult can no longer start your
product's engine in one or two pulls, follow this procedure:
–
–
–
First time starts after extended period of non-use over three
months or seasonal storage
1. Contact any Authorized Lawn-Boy Service Dealer to arrange service
at their dealership. To locate a dealer convenient to you, refer to
the Yellow Pages of your telephone directory (look under “Lawn
also call the numbers listed in item #3 to use the 24-hour Lawn-Boy
Dealer locator system.
Cool temperature starts such as those found in early spring and
late autumn
Improper starting procedures - if you are having difficulty starting
your unit, please check the Operator's Manual to ensure that
you are using the correct starting procedures. This can save an
unnecessary visit to an Authorized Lawn-Boy Service Dealer.
2. Bring the product and your proof of purchase (sales receipt) to the
Service Dealer. The dealer will diagnose the problem and determine
if it is covered under warranty.
General Conditions
All repairs covered by these warranties must be performed by an
Authorized Lawn-Boy Service Dealer using Lawn-Boy-approved
replacement parts. Repair by an Authorized Lawn-Boy Service Dealer is
your sole remedy under this warranty.
3. If for any reason you are dissatisfied with the Service Dealer’s
analysis or with the assistance provided, contact us at:
Customer Care Department
Lawn-Boy Inc.
8111 Lyndale Avenue South
Bloomington, MN 55420-1196
Toll free at 866-216-6032 (U.S. customers)
Toll free at 866-216-6031 (Canadian customers)
Lawn-Boy Inc. nor Lawn-Boy Warranty Company is liable for indirect,
incidental, or consequential damages in connection with the use of
the Lawn-Boy Products covered by these warranties, including any
cost or expense of providing substitute equipment or service during
reasonable periods of malfunction or non-use pending completion of
repairs under these warranties.
Some states do not allow exclusions of incidental or consequential
damages, so the above exclusions may not apply to you.
Owner Responsibilities
You must maintain your Lawn-Boy Product by following the maintenance
procedures described in the Operator's Manual. Such routine
maintenance, whether performed by a dealer or by you, is at your expense.
This warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
Countries Other than the United States or Canada
Customers who have purchased Lawn-Boy products exported from the United States or Canada should contact their Lawn-Boy Distributor (Dealer)
to obtain guarantee policies for your country, province, or state. If for any reason you are dissatisfied with your Distributor's service or have difficulty
obtaining guarantee information, contact the Lawn-Boy importer. If all other remedies fail, you may contact us at Lawn-Boy Warranty Company.
Australian Consumer Law: Australian customers will find details relating to the Australian Consumer Law either inside the box or at your local
Lawn-Boy Dealer.
*Residential purposes means use of the product on the same lot as your home. Use at more than one location, or institutional or rental use, is considered
commercial use and the commercial use warranty would apply.
374-0256 Rev F
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