Craftsman 536773520 Owner’s Manual

6.5 Horsepower KEY START

HIGHWHEEL WEEDTRIMMER:

MODEL NO.

536.773520

Caution: Read and follow all Safety Rules

and Operating Instructions before

first use of this product,

SEARS, ROEBUCK AND CO., Hoffman Estates, IL 60179 U.S

712344 02/10/99

TABLE OF CONTENTS

WARRANTY STATEMENT ...... 2

SAFETY RULES ............... 3

INTERNATIONAL SYMBOLS .... 5

ASSEMBLY ................... 6

OPERATION ................... 9

MAINTENANCE ................ 13

SERVICE AND ADJUSTMENT .., 16

TROUBLE SHOOTING CHART .. 21

SLOPE GUIDE ................. 23

REPAIR PARTS ................ 24

ENGINE REPAIR PARTS ........ 29

SPANISH (ESPANOL) .......... 38

PARTS ORDERING/SERVICE ... 64

WARRANTY STATEMENT

LIMITED TWO-YEAR WARRANTY ON CRAFTSMAN WEEDTRIMMER

Fortwoyearsfrom the date ofpurchase,whenthisCraftsmanWeedtrimmerismaintained, lubricated,and tuned ,up accordingto the operatingand maintenance instructionsin the

owner'smanual, Craftsman wiltrepair,free of charge, any defect in material or workman-

ship.

Ifthis CraftsmanWeedtrimmerisused forcommercialorrental purposes,thiswarrantyap- pliesfor only90 daysfrom thedate of purchase.

This warranty does not cover the following;

Expendable items which become worn during normal use, such as spark plugs, etc.

• Repairnecessary because ofoperatorabuse or negligence,includingbentcrankshafts and the failureto maintainthe equipmentaccordingtothe instructionscontainedinthe

owner's manual.

WARRANTY SERVICE IS AVAILABLE BY RETURNING THE CRAFTSMAN WEED°

TRIMMER TO THE NEAREST CRAFTSMAN SERVICE CENTER/DEPARTMENT IN THE UNITED STATES. THIS WARRANTY APPLIES ONLYWHILE THIS PRODUCT IS IN USE

IN THE UNITED STATES.

This warranty gives you specific legal rights, and you may also have other rights which may vary from state to state.

Sears, Roebuck and Co., D81"7WA, Hoffman Estates. IL 60179

of to cause cancer, birth defects or other reproductive harm.

IMPORTANT: This unit |a equipped with an internal combustion engine and must not be used on or near any unimproved forest-covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a spark arrester is used, it must be maintained in effective working order by the operator.

In the State of California the above is required by law (Section 4442 of the California Public Resources Coda). Other states may have similar laws. Federal laws apply on fed- eral lands. See an Authorized Service Center for a spark arrester for the muffler,

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SAFETY RULES

Safe Operation Practices for Trimmer.

A ARNING: Look for this symbol to point out important safety precautions.

L General Operation

It means: "Attention! Become Alert! Your Safety Is Involved."

Only use accessories approved by the manufacturer.

1. Read, understand, and follow all instruc- tions on the machine and in the manual(s).

Be thoroughly familiar with the controls and

the proper use of the trimmer before start-

ing.

2. Familiarize yourself with all of the safety and operating decals on th_s equipment

and on any of its attachments or accesso- ries.

3. Do not puthands orfeet near or under rotat-

ing parts,

4. Only allow responsible individuals, who are femi{iar with the instructions, to operate the

trimmer.

5. _nspect the area where the trimmer is to be

used. Your equipment can propel small ob-

jects at high speed causing personal injury

or property damage. Stay away from breakable objects, such as house win-

dows, auto glass, greenhouses, etc,

6. Keep the area of operation clear of all per-

sons, particularly small children, end pets.

7, Wear appropriate clothing such as a long-

sleeved shirt or jacket, Also wear long trou- sers or slacks, Do not wear shorts,

8. Do not wear loose clothing which could get

caught in this equipment.

9. Always wear safety goggles or safety

glasses with side shields when operating trimmer to protect your eyes from foreign

objects which can be thrown from the unit.

10. Always wear work gloves and sturdy foot-

wear. Leather work shoes or short boots work well for most people. These will pro-

tect the operator's ankles and shins from smell sticks, splinters, and other debris, and improve traction.

11. It is advisable to wear protective headgear

to prevent the possibility of being struck by small flying particles, or being struck by low

hanging branches, twigs, or other objects

which may be unnoticed by the operator.

12, Do not operate the trimmer without proper

guards or other safety protective devices in place.

13, Use this equipment for its intended pur-

pose only.

14. See manufacturer's instructions for proper operation and installation of accessories.

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15. Operate only in daylight or good artificial light.

16. Do not operatethe trimmer whileunder the influence of alcohol,drugs orother medica-

tion which can cause drowsiness or effect

your abilityto operate this machinesafely.

17. Never operate trimmer in wet grass. Al- ways be sure of your footing; keep a firm

holdon thehandle and walk; never run.

18. Before each use, inspectthe throttlecon- trot lever end cable. Make sure that the

cable isfree and that the lever is notdam-

aged. Also checkthecablelinkagerunning

to the carburetorfor kinks, loose fittings,

end obstructions. Verify that the control bailis working properly.

19. Stopthe rotatingtrimmerheadwhen cross-

inggravel drives, walks, or roads. Waitfor thecuttinglinesto stop rotating.

20. Watch for traffic when operating near, or when crossing roads.

21. Stop the engine (motor) whenever you leave the equipment, before cleaning re-

pairing or inspecting the unit, be sure the trimmer head and all moving parts have stopped. Let the engine cool, disconnect

the spark plugwire and move it away from the spark plug.

22. If the equipmentshouldstart to vibrate ab-

normally,stop the engine (motor),discon- nectthe sparkplugwire and prevent itfrom

touchingthesparkplug. Check immediate-

ly for the cause. Vibration is generally a warningof trouble.

23. Afterstriking a foreign object,stop the en-

gine (motor). Remove the wire from the spark plug. Inspect the trimmer for dam- age. If damaged, repairbeforestartingand operatingthe trimmer.

24. Never leave the trimmer unattendedwhen the engine is running. Remove the wire

from thespark plug.

25. Regularly inspectthe trimmer. Make sure

partsare notbent, damaged or loose.

II. Slope Operation Slopesare a majorfactor related to slip and fall

accidentswhich can resultin severe injury,All

SAFETY RULES

slopes require extra caution. If you feel uneasy on a slope, do nottrim it,

Do trim across the face of slopes; never up and down. Do not trim excessively steep slopes

(ma.%lmum 15 degrees) or areas where the

ground is very rough. See the "Guide" in the

back ofthis manual to check a slope. Exercise extreme caution when changing direction on

slopes. Do remove objects such as rocks, tree limbs,

etc.

Do watch for holes, ruts, or bumps. Tall grass

can hide obstacles.

Do not trim near drop-offs, ditches, or embank-

ments. The operator could lose footing or bal- ance,

Do not trim excessivelysteep slopes. Do not trim on wet grass. Reduced footing

couldcauseslipping,

IlL Children

Tragic accidents can occur ifthe operator is not

alert to the presence of children. Children are often attracted to the trimmer and the trimming

activity. Never assume that children will remain

where you last saw them,

1. Keep children out of the trimming area and

under the watchful care of a responsible adult.

2. Be alert and turn trimmer off if children en-

ter the area.

3. Before and while moving backwards, look behind and down for small children.

4. Nev_ allow children to operate the trim-

mer.

5. Use extra care when approaching blind corners, shrubs, trees, or other objects that may obscure vision.

6. On electric start models, remove the igni-

tion key to prevent accidental starting when the trimmer is not is use.

IV. Service

Use extra care in hand$inggaso$ineand other fuels: They are flammable and va- porsare explosive.

a. Use onlyan approvedcontainer. b. Neverremove gas cap oradd fuel with

the engine running. Allow engine to coolbefore refueling.Do not smoke.

c. Never refuelthe machine indoors,

d. Never store the machine or fuel con-

tainer inside where there is an open flame, such as a water heater,

2. Never run an engine indoors or inside a

closed area.

3. 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

(remove the ignition key if equipped with an electric start), Always wear eye protection

when you make adjustments or repairs.

4. Check the trimmer head and engine

mounting bolts at frequent intervals for proper tightness.

5. Keep all nuts and bolts tight and keep

equipment in good condition. Check mounting hardware on trimmer head every

time you change trimmer line and prior to

each use.

6. Never tamper with safety devices. Check their proper operation regularly.

7. When servicing or repairing the trimmer, do

not tip the machine over or up unless spe- cifically instructed to do so in this Manual. Service and repair procedures can be done

with the trimmer in an upright position.

Some procedures will be easier if the ma- chine is lifted on a raised platform or work- ing surface.

8. To reduce fire hazard, keep trimmer free of grass, leaves, or other debris build-up.

Clean up oil or fuel spillage. Allow trimmer

to cool before storing.

9. Stop and inspect the equipment if you

strike an object. Repair, if necessary, be- fore restarting.

10. Always disconnect spark plug wire before cleaning, repairing, or adjusting.

11. Do not change the engine governor setting or over-speed the engine,

12. Clean and replace safety and instruction decals as necessary.

13. To guard against engine over-heating, al- ways hav_ engine debris lister mounted

and clean.

14, Inspect trimmer before storage. 15, Use only original equipment or authorized

replacement parts.

712344 4

SAFETY RULES

INTERNATIONAL SYMBOLS

IMPORTANT: Many of the following symbols are located on your unit or on literature sup- plied with the product. Before you operate the unit, learn and understand the purpose for each symbol.

ControlAndOperatingSymbols

Slow Fast Fuel OII

SafetyWarningSymbols

WARNING

Thrown Objects.

Keep Bystanders Away.

IMPORTANT

Read Owner's Manual

Before Operating

This Machine.

WARNING

Never Operate Up Or

Down Slopes. Operate

Across Slopes.

WARNING

Rotating Parts. Stop Engine.

Disconnect Spark Wire Before

Making Adjustments.

WARNING

Wear Eye Protection

WARNING

STOP

712344 5

ASSEMBLY

CONTENTS OF PARTS BAG 1 Owner's Manual

- Parts Bag

(Not shown actual size) I

1-wTr-...2,,a- '

TO REMOVE THE

glasses or eye shields while as-

WARNING: Always wear safety

sembling the trimmer.

TOOLS REQUIRED

1 - Knife to cut carton. 1 - T-Handle Wrench.

Figure 1 shows the trimmer completely as-

sembled and positioned in the carton for ship- ment.

References to the right or left hand side of the

trimmer are from the viewpoint of the opera-

tor's position behind the unit,

TRIMMER FROM CARTON

1. Remove the parts bag and all looseparts

from carton.

2. Remove the packing material positioned aroundthe unit.

3. Cut down allfour cornersof the cartonand

laythe side panelsflat.

4. Pull the trimmerout of the carton and off

the base pad.

5. Remove packingmaterialfrom aroundthe

trimmerhead.

6. Remove protective plastic from front of

frame.

712344

Figure 1

ASSEMBLY

HOW TO RAISE THE HANDLE

1. Hold the handle with one hand and loosen both handle adjustment knobs until the ratchet

teeth are disengaged. Do not remove the handle adjustment knobs. See Figure 2.

2. Raise the handle to the operating position.

3. Stand in the operator's position behind the trim-

mer. Put the handle in a comfortable position.

Make sure both sides of

the handle are level.

NOTE: Make sure the cables are not caught

between the upper and lower handle.

4. Tighten the handle ad- justment knobs, Make

sure the handle pivots are locked in place,

NOTE: The handle

height is adjustable. Sea "How To Adjust

The Height Of The Han- dle" in the Adjustment

section.

Recoil Start

Handle

Pivot

Handle Adjustment

Knob

5. Toattach the recoil start handle to the rope guide, twistthe ropethrough therope guide mountedon the rightside of the handle.

Handle

Rgure 2

HOW TO INSTALL THE ENGINE DEBRIS SHIELD

Remove the engine debris shield from the protective packaging.

Attach the engine debris shield to the two

mounting brackets with the wingnuts as

shown in Figure 3. Make sure the wing-

nuts are tight.

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Mounting

Bracket

Engine Debris Shield

Wingnut

Figure3

ASSEMBLY

ENGINE PREPARATION

Fill Crankcase With Oil

The trimmer was shipped with a container of SAE30 motor oil. This oil must be added to the

engine before operating.

1, Remove the oil fill cap/dipstick shown in

Figure 4. Fill the crankcase to the FULL line on oilfill cap/dipstick. DO NOT OVER- FILL.

2. Install the oil fill cap/dipstick and tighten securely.

Fill Fuel Tank With Gasoline

For the correct procedure and grade of

gasoline, see "How To Fill With Gasoline" in the Operation section.

ELECTRIC START BATTERY

When the mower was shipped from the facto- ry, the battery was not fully charged. Before the

first use, the battery must be charged for

16-24 hours. See "How To Charge The Bat-

tery" in the Service And Adjustment section.

Fuel Cap

Oil Fill Cap/

Dipstick

Figure 4

_" CHECKLIST

For the best performance and satisfaction

from this quality product, please review the fol-

lowing checklist before you operate the trim- mer:

P" All assembly instructions have been

completed.

•_" Check carton. Make sure no louse parts

remain in the carton.

712344 8

As you learn how to use the trimmer, pay extra

attention to the following important items:

r_P" Engine oil is at correct level. J."_,_" Fuel tank is filled with fresh, clean, reg-

ular unleaded gasoline.

P",_" Become familiar and understand the

function of all controls. Before your start the engine, operate all controls.

OPERATION

KNOW YOUR TRIMMER

READ THE OWNER'S MANUAL AND ALL SAFETY RULES BEFORE YOU OPERATE the trim-

mer, To familiarize yourself with the location of the controls, compare the illustrations with your trim- mer. Save this manual for future reference,

Control Bail

Ignition Switch

Throttle Control Lever

Recoil Starter Handle

Handle Adjustment Knob

Trimmer Head Drive Lever

Dipstick

Shield Edge Guard _"

Handle

Fuel Cap

Engine DebrisShield

Trimmer Head

Figure5

Trimmer Head Drive Lever - Engages the rotation ofthe trimmer head.

Control Ball - Release to stop the rotation

of the trimmer head. Throttle Control Lever - Controls the

speed or stops the engine.

Primer Button - Injects fuel directty into the

carburetor manifold for fester starts. See

Figure 8.

EYE PROTECTION

WARNING: Debris thrown from the trimmer can resuR in foreign

eyes, which can cause severe objects being thrown into the

eye damage. Always wear safety glasses or eye shields when op- erating the trimmer.

Always wear safety glasses. If you wear eye glasses, put a Wide Vision Safety Mask over

your eye glasses.

712344

Recoil Starter Handle - The engine is equippedwithan easy pullrecoilstarter. Ignition Switch - Use on key-start engine. Shield Edge Guard - Protects the shield

by automaticallycuttingthe line to the correct length.

Engine Debris Shield - Protectsthe en-

gine from debris. Can be easily removed to servicethe engine.

HOW TO STOP

THE TRIMMER HEAD

1. Release tl_econtrol bell. Itwill return to its

open position and disengage the trimmer head,

HOW TO STOP THE ENGINE

1. Move the throttle control lever com-

pletely back to the STOP position,

OPERATION

HOW TO USE THE TRIMMER HEAD DRIVE LEVER

Toengage the trimmer head, hold the con- trol bail against the handle. Move the

trimmer head drive lever forward to en- gage the trimmer head. See Figure 6. The

faster the engine runs, the fester the trim- mer head will rotate.

Once the trimmer head is rotating,push thetrimmerforwardto trim.

HOW TO USE THE

THROTTLE CONTROL

1. During normal use, set the throttle con-

trol lever in the FAST position to run the

engine at full speed.

2, Pull the throttle control lever back to de-

crease engine speed. Push the throttle control lever forward to increase engine

speed.

3. To stop the engine, pullthe throttle con- trol lever completely back to the STOP

position.

HOW TO USE THE PRIMER BUTTON

1. Push the primer button five times. See Figure 8 for location. Wait approximately

two seconds between each push.

NOTE: Do not use the primer button to re-

start awarm engine after a short shutdown.

ThrottleControl

Lever

Figure7

712344 10

OPERATION

BEFORE STARTING THE ENGINE

Oil Recommendation

Only use high quality detergent oil rated with API service classification SG. Select the oil's

SAE viscosity grade according to your ex-

pected operating temperature:

I 32OF I

Colder _,_ -- _I-- _,b --_ Warmer I

<(--'---1---"-->> I

=m, f '==' == I

5w30 SAE30 [

NOTE: Although multi-viscosity oils (5W30, 10W30, etc.) improve starting in

cold weather, these multi-viscosity oils will result in increased oll consumption

when used above 32°F. To avoid possible engine damage from running low on oil, frequently check your engine oil level.

Check The Engine Oil

Before each use, check the engine oi_ as

follows:

1. Put the trimmer on a level surface.

2. Remove the oil fill cap/dipstick shown in Figure 9.

3. Make sure the oil reaches the FULL mark on the oil fill cap/dipstick.

4. If necessary, add oil until the FULL mark on the oil fill cap/dipstick is reached. DO

NOT OVERFILL. See "Oil Recommenda- tion" for the grade and type of oil to use.

Fuel Cap

Oil Fill Cap/Dipstick

Debris Screen

Figure g

712344

How To Fill With Gasoline

NOTICE: ENGINES WHICH ARE CERTI- FIED TO COMPLY WITH CALIFORNIA AND

US EPA EMISSION REGULATIONS FOR ULGE ENGINES: Are certified to operate on

reguisr unleaded gasoline, include the follow- ing emission control system(s): EM, TWC (if so equipped). Include any user adjustable features-therefore no other adjustments are

needed.

WARNING: Never fill the gas tank

hot. Allow the engine to cool

while the engine Is running or

before adding gasoline. Immedi-

ately wipe off any spilled gaso-

line before you start the engine.

WARNING: Gasoline Is flam-

mable. Usa caution when han-

A llng or storing gasoline. Keep

away from an open flame or an electrical spark. Do not smoke while filling the fuel tank. Store

gasoline In a clean, approved container In a cool well ventilated

place; never In the house.

Fill the fuel tank with a fresh, clean, unleaded

regular, unleaded premium, or reformulated automotive gasoline only. DO NOT use

leaded gasoline. Be sure that the gasoline container is clean and free from dust or other

foreign particles. Never use gasoline that is stale from long periods of storage. Reinstall

fuel cap.

CAUTION: Alcohol blended fuels (called

gasohol or using methanol) can attract moisture which leads to separation and

formation of acids during storage. Acidic

gas can damage the fuel system of an en- gine while in storage. To avoid engine

problems, empty the fuel system before

storage of 30 days or longer. Drain the fuel

tank. Start the engine and let it run until the fuel lines and carburetor are empty. Never

usa engine or carburetor cleaner products in the fuel tank or permanent damage may occur. See "Storage Instructions" for addi-

tional information.

OPERATION

HOW TO START THE ENGINE

NOTE: DO NOT BE ALARMED, your engine

will smoke the first time it is started. It is burning off the protective coating that is on

the internal engine parts.

A WARNING: Never leave the trim-

mer unattended whil the engine is runngln. Wait for the trimmer

lines to stop rotation.

Figure 10. Pull back sharply on the recoil

starter handle. DO NOT allow the starter

rope to snap back. Let the starter rope slowly rewind as you hold the recoil starter

handle.

NOTE: If engine fails to start etter three at-

tempts, push the primer button two times

and again try to start the engine.

Beforeeach use, remove debris fromthe debris screen shownin Figure9. Debris

can cause the engine to overheat.Wipe the debris screen with a cloth or paper towel.

2. Key Start: Make sure the battery is con- nected to the wiring harness.

3. Move the throttle control lever forward to

the START or FAST position.

Tostarta coldengine,pushthe primerbut- ton five times. Wait twosecondsbetween

eachpush of the primerbutton. NOTE: Do not use the primer to start a

warm engine.

Key Start: Turn the ignition key to the

START position. Use short starting cycles (15 seconds per minute). When the engine

starts, release the ignition key. If the en- gine will not turn over, charge the battery.

See "How To Charge The Battery".

6. Recoil-Start: Firmly hold the recoil start- er handle with your right hand, See

_k WARNING: Never run the engine

indoors or in a poorly ventilated area. Engine exhaust contains

carbon monoxide, an odorless and dead-

ly gas. Keep hands, feet, hair and loose clothing away from the trimmer and any

moving parts on the engine. Avoid the muffler and surrounding areas. Temper- atures may exceed 150°1=.

Ignition Key /

Figure 10

TRIMMER TIPS

A WARNING: Debris such assticks,

712344

gravel or rocks, can be thrown

with sufficient force to cause per- sonal injury or property damage.

Set the throttle control in the FAST posi-

tion. If the weeds or grass are tall and thick, operate the trimmer at a slower

walking speed.

Frequently clean the underside of the trim- mer to remove any grass build up. See the

Maintenance section for details. For best results and longer lasting line,

use the ends of the line to do the cutting. This is easily done by moving slowly

through very thick or heavy weeds.

Ifthe trimmer lines become too short, it will

take longer to complete the job. If the trim-

mer lines are worn to less than half their original length, change to a new trimmer

line. "See How To Change The Trimmer Line" in the Service And Adjustment sec-

tion.

Do not trim on excessively steep slopes. If a slope isdifficult to stand on, do nottrim.

Do not trim on slopes when the ground is slippery or wet. Trim across the face of a slope, not up and down.

Trimmer head contact to concrete, asphalt and harder services may create prema- ture wear to the height guide (See

Figure 18).

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