Craftsman 917.378521 Manuel utilisateur

Owner's Manual

JCRRFTSMnN'I

ROTARY LAWN MOWER

5.5 Horsepower

Power-Propelled

21" Multi-Cut

Model No.

917.378521

CAUTION:

Read and follow all

Safety Rulesand Instructions

beforeoperatingthisequipment

Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.

Visit ourCraftsman website:www.sears.com/craltsman

Warranty ............................................... 2

Safety Rules ...................................... 2-4

Assembly /Pre-Operation .................... 5

Operation ......................................... 6-10

Maintenance Schedule ...................... 11

Maintenance ................................. 11-14

Product Specifications ........................ 12

Service and Adjustments .............. 14-15

Storage ......................................... 16-17

Troubleshooting ........................... 17-18

Repair Parts .................................. 37-45

Sears Service ...................... Back Cover

LIMITED TWO YEAR WARRANTY ON CRAFTSMAN POWER MOWER

For two years from date of purchase, when this Craftsman Lawn Mower is maintained,

lubricated, and tuned up according to the operating and maintenance instructions in

the owner's manual, Sears will repair free of charge any defect in material or workman-

ship.

If this Craftsman Lawn Mower is used for commercial or rental purposes, this warranty

applies for only 90 days from the date of purchase.

This Warranty does not cover:

• Expendable items which become worn during normal use, such as rotary mower

blades, blade adapters, beLts, air cleaners and spark plug.

• Repairs necessary because of operator abuse or negligence, including bent

crankshafts and the failure to maintain the equipment according to the instructions

contained in the owner's manual.

Warranty service is available by returning the Craftsman power mower to the nearest

Sears Service Center/Department in the United States. This warranty applies only

while this product is used in the United States.

This Warranty gives you specific legal rights, and you may also have other rights which

vary from state to state.

Sears, Roebuck and Co., D/817 WA, Hoffman Estates, Illinois 60179

IMPORTANT: This cutting 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.

ALook for this symbol to point out

important safety precautions. It means

CAUTION!H BECOMEALERT!!! YOUR

SAFETY IS INVOLVED.

ACAUTION: Always disconnect spark

plug wire and place wire where it cannot

contact spark plug in order to prevent

accidental starting when setting up,

transporting, adjusting or making repairs.

_I,WARNING: Engine exhaust, some of

its constituents, and certain vehicle

components contain or emit chemicals

known to the State of California to cause

cancer and birth defects or other repro-

ductive harm.

AWARNING: Battery posts, terminals and

related accessories contain lead and

lead compounds, chemicals known to the

State of California to cause cancer and

birth defects or other reproductive harm.

Wash hands after handling.

ACAUTION: Muffler and other engine

parts become extremely hot during

operation and remain hot after engine

has stopped. To avoid severe burns on

contact, stay away from these areas.

I.GENERAL OPERATION

• Read, understand, and follow all

instructions on the machine and in the

manual(s) before starting. Be thor-

oughly familiar with the controls and

the proper use of the machine before

starting.

• Do not put hands or feet near or under

rotating parts. Keep clear of the

discharge opening at all times.

•Only allow responsible individuals,

who are familiar with the instructions, to

operate the machine.

•Clear the area of objects such as

rocks, toys, wire, bones, sticks, etc.,

which could be picked up and thrown

by the blade.

•Be sure the area is clear of other

people before mowing. Stop machine if

anyone enters the area.

• Do not operate the mower when

barefoot or wearing open sandals.

Always wear substantial foot wear.

• Do not pull mower backwards unless

absolutely necessary. Always look

down and behind before and while

moving backwards.

• Do not operate the mower without

proper guards, plates, grass catcher or

other safety protective devices in place.

• See manufacturer's instructions for

proper operation and installation of

accessories. Only use accessories

approved by the manufacturer.

• Stop the blade(s) when crossing gravel

drives, walks, or roads.

•Stop the engine (motor) whenever you

leave the equipment, before cleaning

the mower or unclogging the chute.

• Shut the engine (motor) off and wait

until the blade comes to complete stop

before removing grass catcher.

• Mow only in daylight or good artificial

light.

• Do not operate the machine while

under the influence of alcohol or drugs.

• Never operate machine in wet grass.

Always be sure of your footing: keep a

firm hold on the handle and walk;

never run.

• Disengage the self-propelled mecha-

nism or drive clutch on mowers so

equipped before starting the engine

(motor).

• If the equipment should start to vibrate

abnormally, stop the engine (motor)

and check immediately for the cause.

Vibration is generally a warning of

trouble.

• Always wear safety goggles or safety

glasses with side shields when

operating mower.

II. SLOPE OPERATION

Slopes are a major factor related to slip

and fall accidents which can result in

severe injury. All slopes require extra

caution. If you feel uneasy on a slope, do

not mow it.

DO:

•Mow across the face of slopes: never

up and down. Exercise extreme caution

when changing direction on slopes.

• Remove obstacles such as rocks, tree

limbs, etc.

• Watch for holes, ruts, or bumps. Tall

grass can hide obstacles.

DO NOT:

• Do not trim near drop-offs, ditches or

embankments. The operator could lose

footing or balance.

• Do not trim excessively steep slopes.

• Do not mow on wet grass. Reduced

footing could cause slipping.

II1. 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.

• Keep children out of the trimming area

and under the watchful care of another

responsible adult.

• Be alert and turn machine off if children

enter the area.

• Before and while walking backwards,

look behind and down for small

children.

• Never allow children to operate the

machine.

• Use extra care when approaching blind

corners, shrubs, trees, or other objects

that may obscure vision.

IV. SERVICE

• Use extra care in handling gasoline

and other fuels. They are flammable

and vapors are explosive.

-Use only an approved container.

-Never remove gas cap or add fuel

with the engine running. Allow

engine to cool before refueling. Do

not smoke.

-Never refuel the machine indoors.

- Never store the machine or fuel

container inside where there is an

open flame, such as a water heater.

•Never run a machine inside a closed

area.

•Never make adjustments or repairs

with the engine (motor) running.

Disconnect the spark plug wire, and

keep the wire away from the plug to

prevent accidental starting.

•Keep nuts and bolts, especially blade

attachment bolts, tight and keep

equipment in good condition.

•Never tamper with safety devices.

Check their proper operation regularly.

• Keep machine free of grass, leaves, or

other debris build-up. Clean oil or fuel

spillage. Allow machine to cool before

storing.

•Stop and inspect the equipment if you

strike an object. Repair, if necessary,

before restarting.

• Never attempt to make wheel height

adjustments while the engine (motor) is

running.

•Grass catcher components are subject

to wear, damage, and deterioration,

which could expose moving parts or

allow objects to be thrown. Frequently

check components and replace with

manufacturer's recommended parts,

when necessary.

•Mower blades are sharp and can cut.

Wrap the blade(s) or wear gloves, and

use extra caution when servicing them.

•Do not change the engine governor

setting or overspeed the engine.

These accessorieswere availablewhen thislawn mowerwas produced. They are not

shipped with your mower. Theyare also availableat mostSears retailoutletsandsewice

centers. MostSears storescan alsoorderrepairpartsfor you,whenyou providethe model

numberofyourlawnmower. Some ofthese accessoriesmay notapply toyourlawnmower.

LAWN MOWER PERFORMANCE

CUPPING DEFLECTOR

FOR REAR DISCHARGE LAWN MOWERS

MULCHERK_S

GRASS CATCHERS

FOR

REAR DISCHARGE

LAWN MOWERS GRASS CATCHERS

FOR

SIDE DISCHARGE

LAWN MOWERS

STABILIZER

GAS CANS

LAWN MOWER MAINTENANCE

MUFFLERS AIR FILTERS SPARK PLUGS

BELTS BLADES BLADE ADAPTERS WHEELS ENGINE OIL

Read these instructions and this manual

in its entirety before you attempt to

assemble or operate your new lawn

mower.

IMPORTANT: This lawn mower is

shipped WITHOUT OIL OR GASOLINE in

the engine.

Your new lawn mower has been as-

sembled at the factory with the exception

of those parts left unassembled for

shipping purposes. All parts such as nuts,

washers, bolts, etc., necessary to com-

plete the assembly have been placed in

the parts bag. To ensure safe and proper

operation of your lawn mower, all parts

and hardware you assemble must be

tightened securely. Use the correct tools

as necessary to ensure proper tightness.

TO REMOVE LAWN MOWER FROM

CARTON

1. Remove loose parts included with

mower.

2. Cut down two end corners of carton

and lay end panel down flat.

3. Remove all packing materials except

padding between upper and lower

handle and padding holding operator

presence control bar to upper handle.

4. Roll lawn mower out of carton and

check carton thorougly for additional

loose parts.

HOW TO SET UP YOUR LAWN

MOWER

TO UNFOLD HANDLE

IMPORTANT: Unfold handle carefully so

as not to pinch or damage control cables.

1. Raise handles until lower handle

section locks into place in mowing

position.

2. Remove protective padding, raise

upper handle section into place on

lower handle and tighten both handle

knobs.

3. Remove handle padding holding

operator presence control bar to

upper handle.

Your lawn mower handle can be adjusted

for your mowing comfort. Refer to "AD-

JUST HANDLE" in the Service and

Adjustments section of this manual.

Operator I

control bar

Mowing

position

Lower handle

TO INSTALL A'I-FACHMENTS

Your lawn mower was shipped ready to

be used as amulcher. To convert to

bagging or discharging, see 'TO CON-

VERT MOWER" in the Operation section

of this manual).

KNOW YOUR LAWN MOWER

READ THIS OWNER'S MANUAL AND ALL SAFETY RULES BEFORE OPERATING

YOUR LAWN MOWER. Compare the illustrations with your lawn mower to familiarize

yourself with the location of various controls and adjustments, Save this manual for

future reference.

These symbols may appear on your lawn mower or in literature supplied with the

product. Learn and understand their meaning.

CAUTION ENGINE ENGINE FAST SLOW CHOKE FUEL OIL DANGER, KEEP HANDS

OR WARNING ON OFF AND FEET AWAY

Throttle/

choke

contr

Operator presence control bar

Drive control lever

Starter

handle Handle knob

Grass catcher

_asoline filler cap

Air filter

Housing

Engine oil cap

with cover

Mulcher door

adjuster (on each wheel)

IMPORTANT: This lawn mower is shipped WITHOUT OIL OR GASOLINE in the engine.

MEETS CPSC SAFETY REQUIREMENTS

Sears rotary walk-behind power lawn mowers conform to the safety standards of the

American National Standards Institute and the U.S. Consumer Product Safety Commis-

sion. The blade turns when the engine is running.

Operator presence control bar -must

be held down to the handle to start the

engine. Release to stop the engine.

Starter handle - used for starting the

engine.

Mulcher door - allows conversion to

discharging or bagging operation, 6

Drive control lever - used to engage

power-propelled forward motion of lawn

mower.

Throttle/choke control - used forstarting

the engine; & allows you toselecteither

CHOKE or FAST engine speed.

The operation of any lawn

mower can result in foreign

objects thrown into the

eyes, which can result in

severe eye damage.

Always wear safety glasses or eye

shields while operating your lawn mower

or performing any adjustments or repairs.

We recommend standard safety glasses

or a wide vision safety mask worn over

spectacles.

HOW TO USE YOUR LAWN MOWER

ENGINE CONTROL

The engine is controlled by a throttle

control located on the side of the upper

handle. CHOKE position is for starting a

cold engine and FAST position is for

starting a warm engine and normal

operation. The engine speed is not

adjustable. ,_

FAST.

CHOKE ,'" "'"

rr" t

### tI

I( /,

_.T."

ENGINE ZONE CONTROL

_I_.CAUTION: Federal regulations require

an engine control to be installed on this

lawn mower in order to minimize the risk

of blade contact inju_. Do not under any

circumstances attempt to defeat the

function of the operator control. The blade

turns when the engine is running.

•Your lawn mower is equipped with an

operator presence control bar which

requires the operator to be positioned

behind the lawn mower handle to start

and operate the lawn mower.

DRIVE CONTROL

•Self-propelling is controlled by holding

the operator presence control bar down

to the handle and pulling the drive

control lever rearward to the handle.

The farther toward the handle the lever

is pulled, the faster the unit will travel.

• Forward motion will stop when either

the operator presence control bar or

drive control lever are released. To

stop forward motion without stopping

engine, release the drive control lever

only. Hold operator presence control

bar down against handle to continue

mowing without self-propelling.

NOTE: If after releasing the drive control

the mower will not roll backwards, push

the mower forward slightly to disengage

drive wheels.

•To keep drive control engaged when

turning comers, push down on the

handle to lift the front wheels off the

ground while turning lawn mower.

control bar

Adjustment ENGAGE DRIVE

button (on DRIVE CONTROL

underside) CONTROL DISENGAGED

DRIVE CONTROL ADJUSTMENT

Over time, the drive control system may

become "loose", resulting in decreased

speed. There is a button on the under-

side of the drive control housing to

increase tension on the drive cable.

Proceed as follows:

1. Turn unit off and disconnect spark

plug wire from spark plug.

2. Pull drive control lever all the way

back to the handle.

3. Push button on underside of drive

control. While holding button in,

return drive control lever to disen-

gaged position.

4. Release button.

5. Operate mower to test drive speed. If

condition becomes worse after the

above steps (forward speed has

become slower), your system was not

"loose". Repeating the above steps

will return your unit to the proper

adjustment and speed.

6. If condition fails to improve after the

above steps (forward speed remains

the same), your drive belt is worn and

should be replaced.

TO ADJUST cu'n'ING HEIGHT

Raise wheels for tow cut and lower

wheels for high cut, adjust cutting height

to suit your requirements. Medium

position is best for most lawns.

• To change cutting height, squeeze

adjuster lever toward wheel. Move

wheel up or down to suit your require-

ments. Be sure all wheels are in the

same setting.

NOTE: Adjuster is properly positioned

when plate tab inserts into hole in lever.

Also, 9-position adjusters (if so equipped)

allow lever to be positioned between the

7 plate tabs.

LOWER WHEELS FOR HIGH CUT

RAISE WHEELS FOR LOW CUT Lever

TO CONVERT MOWER

Your lawn mower was shipped ready to

be used as a mulcher. To convert to

bagging or discharging:

REAR BAGGING

•Lift rear door of the lawn mower and

place the grass catcher frame hooks

onto the door pivot pins.

•To convert to mulching or discharging

operation, remove grass catcher and

close rear door.

Pivot " Rear Grass

"------ catcher

handle

Catcher frame hook

SIDE DISCHARGING

• Rear door must be closed.

• Open mulcher door and install dis-

charge deflector under door as shown.

• Mower is now ready for discharging

operation.

• To convert to mulching or bagging

operation, discharge deflector must be

removed and mulcher door must be

closed.

SIMPLE STEPS TO REMEMBER WHEN

CONVERTING YOUR LAWN MOWER

FOR MULCHING -

t. Rear door closed.

2. Mulcher door closed.

FOR REAR BAGGING -

1. Grass catcher installed.

2. Mulcher door closed.

FOR SIDE DISCHARGING -

1. Rear door closed.

2. Side discharge deflector installed.

ACAUTION: Do not run your lawn

mower without rear door closed, clipping

deflector or approved grass catcher in

place. Never attempt to operate the lawn

mower with the rear door removed or

propped open.

mulcher door

Discharge

TO EMPTY GRASS CATCHER

1. Lift up on grass catcher using the

frame handle.

2. Remove grass catcher with clippings

from under lawn mower handle.

3. Empty clippings from bag using both

frame handle and bag handle.

NOTE: Do not drag the bag when

emptying; it will cause unnecessary wear.

Grass

catcher

frame

handle

Bag

handle

BEFORE STARTING ENGINE

ADD OIL

Your lawnmower is shipped without oil in

the engine. For type and grade of oil to

use, see "ENGINE" in the Maintenance

section of this manual.

• 1,CAUTION: DO NOT overfill engine with

oil, or it will smoke on startup.

1. Be sure lawnmower is level and area

around oil fill is clean.

2. Remove oil dipstick from oil fill spout.

Make sure that rim of spout is clean.

3. You receive a container of oil with the

unit. Slowly pour 3/4 (12 oz,) of the oil

from the container down the oil fill

spout into the engine.

4. Wait one minute to allow oil to settle.

Use guage on oil fill cap/dipstick for

checking level. Insert dipstick into the

tube and rest the oil fill cap on the

tube. DO NOT thread the cap into the

tube when taking reading.

5. Continue adding small amounts of oil

and rechecking the dipstick until it

reads full. DO NOT overfill, or engine

will smoke on startup.

6. Always be sure to retighten oil dipstick

before starting engine.

•Check oil level before each use. Add

oil if needed. Fill to full line on dipstick.

• Change the oil after every 25 hours of

operation or each season. You may

need to change the oil more often

under dusty, dirty conditions.

ADD GASOLINE

• Fill fuel tank to bottom of tank filler

neck. Do not overfill. Use fresh, clean,

regular unleaded gasoline with a

minimum of 87 octane. Do not mix oil

with gasoline. Purchase fuel in

quantities that can be used within 30

_ldays to assure fuel freshness.

CAUTION: Wipe off any spilled oil or

fuel. Do not store, spill or use gasoline

near an open flame.

_1=CAUTION: Alcohol blended fuels

(called gasohol or using ethanol or

methanol) can attract moisture which

leads to separation and formation of

acids during storage. Acidic gas can

damage the fuel system of an engine

while in storage. To avoid engine

problems, the fuel system should be

emptied before storage of 30 days or

longer. Drain the gas tank, start the

engine and let it run until the fuel lines

and carburetor are empty. Use fresh fuel

next season. See Storage Instructions for

additional information. Never use engine

or carburetor cleaner products in the fuel

tank or permanent damage may occur.

Oil filler cap/dipstick

Gasoline

filler cap

Oil

cap

TO START ENGINE

NOTE: Due to protective coatings on the

engine, a small amount of smoke may be

present during the initial use of the

product and should be considered

normal.

1. Be sure fuel valve is in the ON

position.

2. To start a cold engine, move handle

mounted throttle/choke control lever to

CHOKE position.

3. Hold operator presence control bar

down to the handle and pull starter

handle quickly. Do not allow starter

rope to snap back.

4. Slowly move throttle control lever to

FAST position after engine starts.

•To start a warm engine, move throttle

control lever to FAST position, then

follow steps above.

TO STOP ENGINE

To stop engine, release operator

presence control bar. Wait until blade

and all moving parts have stopped and

turn fuel valve to OFF position if you do

not intend to restart the engine soon.

Fuel valve lever

MOWING TIPS

•Under certain conditions, such as very

tail grass, it may be necessary to raise

the height of cut to reduce pushing

effort and to keep from overloading the

engine and leaving clumps of grass

clippings. It may also be necessary to

reduce ground speed and/or run the

mower over the area a second time.

• For extremely heavy cutting, reduce the

width of cut by overlapping previously

cut path and mow slowly.

• For better grass bagging and most

cutting conditions, the engine speed

should be set in the FAST position.

•Pores in cloth grass catchers can

become filled with dirt and dust with

use and catchers will collect less grass.

To prevent this, regularly hose catcher

off with water and let dry before using.

•Keep top of engine around starter clear

and clean of grass c)ippings and chaff.

This will help engine air flow and

extend engine life.

MULCHING MOWING TIPS

IMPORTANT: For best performance,

keep mower housing free of built-up

grass and trash. See "CLEANING" in the

Maintenance section of this manual.

•The special mulching blade will recut

the grass clippings many times and

reduce them in size so that as they fall

onto the _awn they will disperse into the

grass and not be noticed. Also, the

mulched grass will biodegrade quickly

to provide nutrients for the lawn.

Always mulch with your highest engine

(blade) speed as this will provide the

best recutting action of the blades.

• Avoid cutting your lawn when it is wet.

Wet grass tends to form clumps and

interferes with the mulching action. The

best time to mow your lawn is the early

afternoon. At this time the grass has

dried and the newly cut area will not be

exposed to the direct sun.

• For best results, adjust the lawn mower

cutting height so that the lawn mower

cuts off only the top one-third of the

grass blades. If the lawn is overgrown it

will be necessary to raise the height of

cut to reduce pushing effort and to keep

from overloading the engine and

leaving clumps of mulched grass. For

extremely heavy grass, reduce your

width of cut by overlapping previously

cut path and mow slowly.

• Certain types of grass and grass

conditions may require that an area be

mulched a second time to completely

hide the clippings. When doing a

second cut, mow across or perpendicu-

lar to the first cut path.

• Change your cutting pattern from week

to week. Mow north to south one week

then change to east to west the next

week. This will help prevent matting

10 and graining of the lawn.

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