MTD 839 User Manual
Safety • Setup • Adjustments • Operation • Maintenance • Troubleshooting • Parts Lists • Warranty
OPERATOR’S MANUAL
21” Self-Propelled Rotary Mower — Model Series 839
IMPORTANT:
READ SAFETY RULES AND INSTRUCTIONS
CAREFULLY BEFORE OPERATING EQUIPMENT.
PRINTED IN U.S.A. MTD Products Ltd., P. O. Box 1386, KITCHENER, ONTARIO N2G 4J1
This Operator’s Manual is an important part of your new equipment. It will help you assemble,
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prepare and maintain the unit for best performance. Please read and understand what it says.
Table of Contents
Slope Gauge........................................................ 3
Safe Operation Practices ................................... 4
Set-Up & Adjustments ........................................ 6
Operation ............................................................. 8
Maintenance & Off-Season Storage ................ 10
Finding and Recording Model Number
BEFORE YOU START ASSEMBLING
YOUR NEW EQUIPMENT,
please locate the model plate on the equipment and copy the
the model number and the serial number to the sample model
plate provided to the right. You can locate the model plate by
standing at the operating position and looking down at the rear
of the machine.
Trouble Shooting .............................................. 13
Warranty ............................................................ 14
Safety Labels ....................................................15
Illustrated Parts Lists ....................................... 16
Customer Support
Please do
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit,
you can seek help from the experts. Choose from the options below:
1. Visit www.mtdcanada.ca for many useful suggestions, click on Customer Support button.
2. Call a Customer Support Representative at 1-800-668-1238.
3. The engine manufacturer is responsible for all engine-related issues with regards to performance, power-rating, specifications, warranty and service. Please refer to the engine manufacturer’s Owner’s/Operator’s Manual, packed separately with
your unit, for more information.
Please have your unit’s model number and serial number ready when you call. See previous section to locate this information.
You will be asked to enter the serial number in order to process your call.
NOT
return the unit to the retailer from which it was purchased,
without first contacting Customer Support.
2
1
Slope
Gauge
WARNING
Do not mow on inclines
with a slope in excess
of 15 degrees (a rise
of approximately
2-1/2 feet every 10
feet). A riding mower
could overturn and
cause serious injury.
If operating a walkbehind mower on such
a slope, it is extremely
difficult to maintain your
footing and you could
slip, resulting in serious
injury.
Operate RIDING
mowers up and down
slopes, never across
the face of slopes.
Operate
WALK-BEHIND
mowers across the
face of slopes, never
up and down slopes.
3
2
Safe
Operation
Practices
WARNING
This symbol points
out important safety
instructions which, if
not followed, could
endanger the personal
safety and/or property
of yourself and others.
Read and follow all
instructions in this
manual before attempting to operate
this machine. Failure
to comply with these
instructions may result
in personal injury. When
you see this symbol.
HEED ITS WARNING!
Your Responsibility
Restrict the use
of this power machine
to persons who read,
understand
and follow the warnings
and instructions
in this manual
and on the machine.
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or
emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm.
DANGER: This machine was built to be operated according to the rules for safe operation in this manual. As with
any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This
machine is capable of amputating hands and feet and throwing objects. Failure to observe the following safety
instructions could result in serious injury or death.
General Operation
1. Read this operator’s manual carefully in its entirety before
attempting to assemble this machine. Read, understand,
and follow all instructions on the machine and in the
manual(s) before operation. Be completely familiar with
the controls and the proper use of this machine before
operating it. Keep this manual in a safe place for future
and regular reference and for ordering replacement parts.
2. This machine is a precision piece of power equipment,
not a plaything. Therefore, exercise extreme caution at all
times. Your unit has been designed to perform one job: to
mow grass. Do not use it for any other purpose.
3. Never allow children under 14 years old to operate this
machine. Children 14 years old and over should read and
understand the instructions in this manual and should
be trained and supervised by a parent. Only responsible
individuals who are familiar with these rules of safe
operation should be allowed to use this machine.
4. Thoroughly inspect the area where the equipment is to
be used. Remove all stones, sticks, wire, bones, toys and
other foreign objects which could be tripped over or picked
up and thrown by the blade. Thrown objects can cause
serious personal injury. Plan your mowing pattern to avoid
discharge of material toward roads, sidewalks, bystanders
and the like. Also, avoid discharging material against a
wall or obstruction which may cause discharged material
to ricochet back toward the operator.
5. To help avoid blade contact or a thrown object injury,
stay in the operator zone behind the handles and keep
children, bystanders, helpers and pets at least 75 feet
from the mower while it is in operation. Stop machine if
anyone enters the area.
6. Always wear safety glasses or safety goggles during
operation and while performing an adjustment or repair
to protect your eyes. Thrown objects which ricochet can
cause serious injury to the eyes.
7. Wear sturdy, rough-soled work shoes and close-fitting
slacks and shirts. Shirts and pants that cover the arms
and legs and steel-toed shoes are recommended. Never
operate this machine in bare feet, sandals, slippery or light
weight (e.g. canvas) shoes.
8. Do not put hands or feet near rotating parts or under the
cutting deck. Contact with the blade can amputate hands
and feet.
9. A missing or damaged discharge cover can cause blade
contact or thrown object injuries.
10. Many injuries occur as a result of the mower being pulled
over the foot during a fall caused by slipping or tripping.
Do not hold on to the mower if you are falling; release the
handle immediately.
11. Never pull the mower back toward you while you are
walking. If you must back the mower away from a wall or
obstruction first look down and behind to avoid tripping
and then follow these steps:
a. Step back from the mower to fully extend your arms.
b. Be sure you are well balanced with sure footing.
c. Pull the mower back slowly, no more than half way
toward you.
d. Repeat these steps as needed.
12. Do not operate the mower while under the influence of
alcohol or drugs.
13. Do not engage the self-propelled mechanism on units so
equipped while starting engine.
14. The blade control handle is a safety device. Never attempt
to bypass its operation. Doing so makes the safety device
inoperative and may result in personal injury through
contact with the rotating blade. The blade control handle
must operate easily in both directions and automatically
return to the disengaged position when released.
15. Never operate the mower in wet grass. Always be sure of
your footing. A slip and fall can cause serious personal
injury. If you feel you are losing your footing, release the
blade control handle immediately and the blade will stop
rotating within three seconds.
16. Mow only in daylight or in good artificial light. Walk, never
run. Stop the blade when crossing gravel drives, walks or
roads.
17. If the equipment should start to vibrate abnormally, stop the
engine and check immediately for the cause. Vibration is
generally a warning of trouble.
18. Shut the engine off and wait until the blade comes to
a complete stop before removing the grass catcher or
unclogging the chute. The cutting blade continues to rotate
for a few seconds after the engine is shut off. Never place
any part of the body in the blade area until you are sure the
blade has stopped rotating.
19. Never operate mower without proper trail shield, discharge
cover, grass catcher, blade control handle or other safety
protective devices in place and working. Never operate
mower with damaged safety devices. Failure to do so, can
result in personal injury.
20. Muffler and engine become hot and can cause a burn. Do
not touch.
21. Only use parts and accessories made for this machine by
the manufacturer. Failure to do so can result in personal
injury.
22. If situations occur which are not covered in this manual, use
care and good judgment. Call customer assistance for the
name of your nearest servicing dealer.
Slope Operation
Slopes are a major factor related to slip and fall accidents which
can result in severe injury. Operation on slopes requires extra
caution. If you feel uneasy on a slope, do not mow it. For your
safety, use the slope gauge included as part of this manual to
measure slopes before operating this unit on a sloped or hilly
area. If the slope is greater than 15 degrees, do not mow it.
4
Do:
1. Mow across the face of slopes; never up and down.
Exercise extreme caution when changing direction on
slopes.
2. Watch for holes, ruts, rocks, hidden objects, or bumps which
can cause you to slip or trip. Tall grass can hide obstacles.
3. Always be sure of your footing. A slip and fall can cause
serious personal injury. If you feel you are losing your
balance, release the blade control handle immediately, and
the blade will stop rotating within 3 seconds.
Do Not:
1. Do not mow near drop-offs, ditches or embankments, you
could lose your footing or balance.
2. Do not mow slopes greater than 15 degrees as shown on
the slope gauge.
3. Do not mow on wet grass. Unstable footing could cause
slipping.
Children
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the mower
and the mowing activity. They do not understand the dangers.
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 a responsible adult other than the operator.
2. Be alert and turn mower off if a child enters the area.
3. Before and while moving backwards, look behind and down
for small children.
4. Use extreme care when approaching blind corners,
doorways, shrubs, trees, or other objects that may obscure
your vision of a child who may run into the mower.
5. Keep children away from hot or running engines. They can
suffer burns from a hot muffler.
6. Never allow children under 14 years old to operate a power
mower. Children 14 years old and over should read and
understand the operation instructions and safety rules in
this manual and should be trained and supervised by a
parent.
Service
Safe Handling Of Gasoline:
1. To avoid personal injury or property damage use extreme
care in handling gasoline. Gasoline is extremely flammable
and the vapors are explosive. Serious personal injury can
occur when gasoline is spilled on yourself or your clothes
which can ignite.
2. Wash your skin and change clothes immediately.
3. Use only an approved gasoline container.
4. 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.
5. 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.
6. 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.
7. Extinguish all cigarettes, cigars, pipes and other sources of
ignition.
8. Never fuel machine indoors because flammable vapors
will accumulate in the area.
9. Never remove gas cap or add fuel while the engine is
hot or running. Allow engine to cool at least two minutes
before refueling.
10. Never over fill fuel tank. Fill tank to no more than ½ inch
below bottom of filler neck to provide for fuel expansion.
11. Replace gasoline cap and tighten securely.
12. If gasoline is spilled, wipe it off the engine and equipment.
Move unit to another area. Wait 5 minutes before starting
the engine.
13. Never store the machine or fuel container near an open
flame, spark or pilot light as on a water heater, space
heater, furnace, clothes dryer or other gas appliances.
14. To reduce fire hazard, keep mower free of grass, leaves,
or other debris build-up. Clean up oil or fuel spillage and
remove any fuel soaked debris.
15. Allow a mower to cool at least 5 minutes before storing.
General Service:
1. Never run an engine indoors or in a poorly ventilated area.
Engine exhaust contains carbon monoxide, an odorless
and deadly gas.
2. Before cleaning, repairing, or inspecting, make certain the
blade and all moving parts have stopped. Disconnect the
spark plug wire and ground against the engine to prevent
unintended starting.
3. Check the blade and engine mounting bolts at frequent
intervals for proper tightness. Also, visually inspect blade
for damage (e.g., bent, cracked, worn) Replace blade with
the original equipment manufacture’s (O.E.M.) blade only,
listed in this manual. “Use of parts which do not meet the
original equipment specifications may lead to improper
performance and compromise safety! ”
4. Mower blades are sharp and can cut. Wrap the blade or
wear gloves, and use extra caution when servicing them.
5. Keep all nuts, bolts, and screws tight to be sure the
equipment is in safe working condition.
6. Never tamper with safety devices. Check their proper
operation regularly.
7. After striking a foreign object, stop the engine, disconnect the spark plug wire and ground against the engine.
Thoroughly inspect the mower for any damage. Repair the
damage before starting and operating the mower.
8. Never attempt to make a wheel or cutting height adjustment while the engine is running.
9. Grass catcher components, discharge cover, and trail
shield are subject to wear and damage which could
expose moving parts or allow objects to be thrown. For
safety protection, frequently check components and replace immediately with original equipment manufacturer’s
(O.E.M.) parts only, listed in this manual. “Use of parts
which do not meet the original equipment specifications
may lead to improper performance and compromise
safety!”
10. Do not change the engine governor setting or overspeed
the engine. The governor controls the maximum safe
operating speed of the engine.
11. Maintain or replace safety labels, as necessary.
12. Observe proper disposal laws and regulations. Improper
disposal of fluids and materials can harm the environment.
2
Safe
Operation
Practices
WARNING
This symbol points
out important safety
instructions which, if
not followed, could
endanger the personal
safety and/or property
of yourself and others.
Read and follow all
instructions in this
manual before attempting to operate
this machine. Failure
to comply with these
instructions may result
in personal injury. When
you see this symbol.
HEED ITS WARNING!
Your Responsibility
Restrict the use
of this power machine
to persons who read,
understand
and follow the warnings
and instructions
in this manual
and on the machine.
5
3
Setup and
Adjust
NOTE: This Operator’s
Manual covers
several models. Lawn
Mower features vary by
model. Not all features
discussed (or engines
pictured) in this manual
are applicable to all
Lawn Mower models.
NOTE: Reference to
right, left, front and rear
of the lawn mower is in
relation to the operating
position.
Make sure to route
cable outside the
lower handle. Do not
crimp cable while
lifting the handle up.
ments
IMPORTANT
Figure 3-1
Figure 3-2
NOTE: The units illustrated may vary slightly from your unit.
1. Remove loose parts and any packing material which
may be between upper and lower handles.
a. Remove star knobs from handle mounting brackets
and pull up and back on the upper handle to raise
the handle from position A into the operating
position B. See Figure 3-1. Make sure the lower
handle is seated securly into the handle mounting
brackets.
b. Tighten star knobs securing upper handle to
lower handle. Make sure that each carriage bolt is
seated properly in the handle.
2. Replace and tighten star knobs removed earlier to
secure lower handle to handle backets. See Figure
3-2.
3. Rope guide Setup as follows, see Figure 3-3:
a. Hold the blade control against the upper handle.
Position A.
b. Slowly pull starter rope out of engine. Position B.
c. Slip starter rope into the rope guide. Position C.
d. Tighten rope guide wing nut. Position D.
4. Secure cables to the lower handle using the cable tie.
Pull cable tie tight and cut off excess.
5. To assemble the grasscatcher:
a. Place bag over frame (black plastic side is the bot-
tom of bag.) Insert the hooks on the frame through
the holes in the side plastic channels of the bag.
b. Secure bag to frame by working the plastic chan-
nels on bag over frame. All of the plastic channels
except center top of bag attach from the outside of
bag. Center top of bag attaches from the inside of
bag.
6. Before attaching the grass catcher, the rear mulching
plug must be removed. Refer to Figure 3-4.
a. Lift rear discharge door.
b. Remove rear mulching plug.
IMPORTANT
This unit is shipped
without gasoline or
oil in the engine. Fill
up gasoline and oil
as instructed in the
accompanying engine
manual BEFORE
operating your mower.
Figure 3-3
6
7. Attaching Grass Catcher to Mower
a. Lift the rear discharge door.
b. Place the grass catcher on the pivot rod. Let go
of discharge door so that it rests on the grass
catcher. See Figure 3-5.
WARNING: Never operate mower
unless the hooks on the grass
catcher are firmly seated on the pivot
rod, and the rear discharge door
rests firmly against top of the grass
catcher.
8. To install the rear mulching plug.
a. Lift rear discharge door and lift grass catcher up
and out, off of the pivot rod.
b. Insert the rear mulching plug as shown in Figure
3-4 and release the rear discharge door.
9. If converting to side discharge, make sure grass
catcher is off unit and rear mulching plug is in place.
a. On the side of the mower deck, lift the hinged
mulching plug. See Figure 3-6.
b. Slide the two hooks on the side discharge deflec-
tor under the hinge pin on the hinged mulching
plug assembly. Lower the hinged mulching plug.
NOTE: Do not remove the hinged mulching plug at any
time, even when you are not mulching.
3
NOTE: Make certain
bag is turned right side
out before assembling
(warning label will be on
A
B
the outside).
NOTE: Make certain
cables are routed to the
outside of the handle so
they are not in the way
when attaching the grass
catcher.
Adjustments
Drive Control
The adjustment wheel is located in the drive control
handle housing and is used to tighten or loosen the
drive belt. You will need to adjust the drive control if
the mower does not propel itself with the drive control
engaged or if the mower’s wheels hesitate with the drive
control engaged. If either of these conditions occur, rotate
the adjustment wheel clockwise to tighten the cable or
counterclockwise to loosen the cable, Figure 3-7.
Figure 3-6
WARNING
Never operate mower
unless the hooks on
the grass catcher are
firmly seated on the
pivot rod, and the
rear discharge door
rests firmly against
top of the grass
catcher.
All mowers are
equipped with a rear
protective guard. The
guard helps eliminate
projectiles thrown
by the blade from
injuring the operator.
DO NOT REMOVE
THIS GUARD.
7
4
Operating
Your Lawn
Mower
WARNING
Read, understand,
and follow all instructions and warnings
on the machine and
in this manual before
operating.
This blade control
mechanism is a
safety device. Never
attempt to bypass its
operations.
Use extreme care
when handling
gasoline. Gasoline is
extremely flammable
and the vapors are
explosive. Never fuel
the machine indoors
or while the engine
is hot or running.
Extinguish cigarettes,
cigars, pipes and
other sources of
ignition.
Know Your Lawn Mower
Figure 4-1
Blade Control Handle
The blade control handle is located on the upper handle
of the mower. See Figure 4-1. The blade control handle
must be depressed in order to operate the unit. Release
the blade control handle to stop the engine and blade.
Drive Control Handle
The drive control handle is located on the upper handle.
Squeeze the drive control handle against the upper
handle to engage drive system. Release the control
handle to disengage the drive system in order to stop,
slow down, or backup.
Recoil Starter
The recoil starter is attached to the right upper handle.
Stand behind the unit and pull the recoil starter rope to
start the unit.
Cutting Height Adjustment Lever
The height adjuster determines the cutting height of the
mower. The adjuster is located above the left rear wheel,
refer to the Adjustment Section.
Before Starting
1. Service the engine with gasoline and oil as instructed
in the separate engine manual.
WARNING: Be sure no one other
than the operator is standing
near the lawn mower while
starting engine or operating mower. Never
run engine indoors or in enclosed, poorly
ventilated areas. Engine exhaust contains
carbon monoxide, an odorless and deadly
gas. Keep hands, feet, hair and loose clothing
away from any moving parts on engine and
lawn mower.
2. Attach spark plug wire to spark plug. If unit is
equipped with a rubber boot over the end of the spark
plug wire, make certain the metal loop on the end of
the spark plug wire (inside the rubber boot) is fastened
securely over the metal tip on the spark plug.
3. Before each use, check for proper drive clutch operation by performing the following before starting the
engine:
a. With the drive control released, push mower
forward. It should move freely. Pull mower backward. It should move with only a small amount of
resistance.
b. If it does not the clutch may not be releasing
completely. Do not start the engine until corrections
have been made. Check the control cable for
severe bend, kinks and binding. Also check for
grass build-up around the belt.
8
Using Your Lawn Mower
Be sure the lawn is clear of stones, sticks, wire, or other
objects which could damage the lawn mower or the
engine. Such objects could be accidently thrown by the
mower in any direction and cause serious personal injury
to the operator and others.
4
Figure 4-2
To Start Engine and Engage Blade
Refer to the separate engine manual packed with
your unit.
1. Place the fuel valve lever found on the left side of the
engine into the ON (OPEN) position, Figure 4-2.
2. Move the choke lever all the way backward into the
choke position.
3. Standing behind the mower, squeeze the blade
control against upper handle, Figure 4-2. The choke
will now begin to slowly return to the off choke
position after activating the blade control. Therefore,
quickly move onto step four below.
4. Grasp the starter handle as shown and pull slowly
until resistance is felt, then pull rapidly to start engine
and avoid kickback. Return it slowly to the rope guide.
5. To engage the drive, squeeze the drive control handle
towards the upper handle. Release the drive control
to slow down when negotiating an obstacle, making a
turn, or stopping.
To Stop Engine
1. Release the blade control handle to stop the engine
and blade.
WARNING: The blade continues
to rotate for a few seconds after
the engine is shut off.
2. Disconnect and ground the spark plug wire as
instructed in the separate engine manual to prevent
accidental starting while equipment is unattended.
WARNING: Wait for the blade to
stop completely before doing any
work on the mower or to remove
the grass catcher.
WARNING: If you strike a foreign
object, stop the engine. Remove
wire from the spark plug, thoroughly inspect the mower for any
damage, and repair the damage
before restarting and operating
the mower. Extensive vibration
of the mower during operation is
an indication of damage. The unit
should be promptly inspected
and repaired.
Operating Tips
1. To engage the drive, squeeze the drive control handle
towards the upper handle. Release the drive control
to slow down when negotiating an obstacle, making a
turn, or stopping.
2. For best results do not cut wet grass.
3. New grass, thick grass, or wet grass may require a
narrower cut.
4. For a healthier lawn, never cut off more than one-third
of the total length of the grass.
5. Your lawn should be cut in the fall as long as there
is growth.
6. If the grass has been allowed to grow in excess of 4
inches, mulching is not recommended. Mow using
the side discharge to reduce the grass height to 3-1/4
inches or less before mulching.
Operating
Your Lawn
Mower
WARNING
The operation of any
lawn mower can result
in foreign objects
being thrown into
the eyes, which can
damage your eyes
severely. Always wear
safety glasses while
operating the mower,
or while performing
any adjustments or
repairs on it.
Be sure no one other
than the operator is
standing near the lawn
mower while starting
engine or operating
mower. Never run
engine indoors or
in enclosed, poorly
ventilated areas. Engine exhaust contains
carbon monoxide, an
odorless and deadly
gas. Keep hands, feet,
hair and loose clothing
away from any moving
parts on engine and
lawn mower.
9
5
Maintaining
Your Lawn
Mower
WARNING
Always stop engine,
disconnect spark plug,
and ground against
engine before cleaning,
lubricating or doing any
kind of maintenance on
your machine.
Figure 5-1
Engine
1. Refer to the separate engine manual for engine
maintenance instructions.
2. Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.
3. Under normal conditions service air cleaner as
instructed in the separate engine manual packed with
your unit. Clean every few hours under extremely
dusty conditions. Poor engine performance and
flooding usually indicates that the air cleaner should
be serviced.
4. The spark plug should be cleaned and the gap reset
once a season. Spark plug replacement is recommended at the start of each mowing season; check
engine manual for correct plug type and gap specifications.
NOTE: This spark ignition system meets all requirements of the Canadian Interference-Causing Equipment
Regulations.
5. Clean the engine regularly with a cloth or brush.
Keep the cooling system (blower housing area) clean
to permit proper air circulation which is essential to
engine performance and life. Be certain to remove all
grass, dirt and combustible debris from muffler area.
Deck
The underside of the mower deck should be cleaned after
each use to prevent a buildup of grass clippings, leaves,
dirt or other matter. If this debris is allowed to accumulate,
it will invite rust and corrosion, and may prevent proper
mulching.
The deck may be cleaned by tilting the mower and scraping clean with a suitable tool (make certain the spark plug
wire is disconnected).
IMPORTANT: Do not
use a pressure washer
or garden hose to clean
your unit. These may
cause damage to electric
components, spindles,
pulleys, bearings, or the
engine. The use of water
will result in shortened life
and reduce serviceability.
Figure 5-2
Lubrication
1. Lubricate the pivot points on the blade control handle
at least once a season with light oil. The blade
control must operate freely in both directions. See
Figure 5-1.
2. If your mower is equipped with ball bearing wheels,
lubricate at least once a season with a light oil, all
other types require no lubrication. However, if the
wheels are removed for any reason, lubricate the
surface of the axle bolt and the inner surface of the
wheel with light automotive oil.
3. Lubricate the torsion spring and pivot point periodically with light oil to prevent rust. See Figure 5-1.
4. The transmission is pre-lubricated and sealed at the
factory and does not require lubrication.
5. Follow the accompanying engine manual for lubrication schedule and instruction.
Rear Flap Replacement
The rear flap is attached to the back of the mower deck,
and is designed to minimize the possibility that objects
will be thrown from the rear of the mower toward the
operator. If the rear flap becomes damaged, replace as
follows.
1. To remove the old rear flap, lift rear door, and press
flap in on either side to remove from hole. See Figure
5-2.
2. Remove flap from opposite hole and replace with new
flap following these steps in reverse order.
Blade Care
Periodically inspect the blade adapter for cracks,
especially if you strike a foreign object. Replace when
necessary. Follow the steps below for blade service:
1. Remove the bolt and the blade bell support which
hold the blade and the blade adapter to the engine
crankshaft. See Figure 5-3.
2. Remove blade and adapter from the crankshaft.
10
5
Maintaining
Your Lawn
Mower
WARNING
When removing
the cutting blade
for sharpening or
replacement or
when sliding the belt
around it, protect
your hands with a
pair of heavy gloves
or use a heavy rag to
hold the blade.
11
An unbalanced blade
will cause excessive
vibration when rotating at high speeds. It
may cause damage
to mower, and could
break causing personal injury.
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