Craftsman 917.388721 User Manual

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Owner’s Manual

6.0 HORSEPOWER 21" MULTI-CUT

ROTARY LAWN MOWER

Model No.

917.388721

Safety Assembly Operation Maintenance Español Repair Parts

CAUTION:

Read and follow all Safety Rules and Instructions before operating this equipment

Sears, Roebuck and Co., Hoffman Estates, IL 60179

Visit our Craftsman website: www.sears.com/craftsman

Warranty Safety Rules Assembly Operation Maintenance Schedule

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Maintenance..............................

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2-4 6-9

10-13

Product Specifications..............

Service and Adjustments..,.

Storage..................................

Troubleshooting

Repair Parts

Parts Ordering

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WARRANTY

LIMITED TWOYEAR 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 owners manual, Sears wili 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 arid 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 in use 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

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34-41

SAFETY RULES

IMPORTANT: This cutting machine is capable of amputating hands and feel and throwing objects. Failure to observe the following safety instructions could result In serious Injury or death.

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 pul 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 rrtajor factor related to slip and fail 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.

III. 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 white walking backwards, look behind and down for small children.

• Never allow children to operate the machine.

• Use extra care when approachir>g blind comers, shrubs, trees, or other objects that may obscure vision.

IV. SERVICE

• Use extra care in handling gasoline and other fuels. They are flammable and vapwrs 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 fl'om 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 devrices.

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 ^uipment If you strike an object. Repair, if necessary, before restarting.

• Never attempt to rnake 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 serwcing them.

• Do not change the engine governor setting or overspeed the engine.

ALook for this symbol to point out important safety precautions, it means CAUTIONllI BECOME ALERTil! YOUR SAFETY IS INVOLVED.

AWARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of Caltfomia to cause cancer and birth defects or other reproductive harm.

A WARNING; In order to prevent acci

Wash hands after handling. dental starting when setting up, transport ing, adjusting or making repairs, aiways disconnect spark plug wire and place wire where it cannot contact spark plug.

AWARNING: Engine exhaust, some of its constituents, and certain vehicle compo

A CAUTION: 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. nents contain or emit chemicals known to

the State of California to cause cancer and birth defects or other reproductive harm.

ACCESSORIES

These accessories were available when this lawn mower was produced. They are not shipped with your mower. They are also available at most Sears retail outlets and service centers. Most Sears stores can also order repair parts for you, when you provide the model number of your lawn mower. Some of these accessories may not apply to your lawn mower.

LAWN MOWER PERFORMANCE

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CLIPPING DEFLECTOR

FOR REAR DISCHARGE LAWN MOWERS

GRASS CATCHERS

FOR

REAR DISCHARGE

LAWN MOWERS

LAWN MOWER MAINTENANCE

MUFFLERS

BELTS

BLADES

MULCHER KITS

AIR FILTERS

BLADE ADAPTERS

GRASS CATCHERS

FOR

SIDE DISCHARGE

LAWN MOWERS

WHEELS

STABILIZER

GAS CANS

SPARK PLUGS

ENGINE

OIL

ASSEMBLY

Read ttiese instructions and this manuai in its entirety before you attempt to assembie or operate your new lawn mower. IMPORTANT: This lawn mower is shipped WITHOUT OIL OR GASOUNE 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. Ail 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 comers 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.

HOWTO SET UPYOUR LAWN MGWER

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.

TO INSTALL ATTACHMENTS

Your lawn mower was shipped ready to

be used as a mulcher. To convert to bagging or discharging, see "TO CON VERT MOWER’ in the Operation section of this manual.

OPERATION

KNOW YOUR LAWN MOWER READ THIS OWNER'S MANUAL AND 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.

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STOP

CAUTION ENGINE ENGINE

OR WARNING ON OFF

Starter handle

Grass catchier

Gasoline filler cap

Air filter

FAST SLOW

CHOKE

Opierator presence control bar

Engine zone control cable

Handle knob

Engine oil cap with dipstick

DANGER, KEEP HANDS

AND FEET AWAY

Muffler

Housing

Mulcher door

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

Wheel adjuster (on each wheel)

MEETS CPSC SAFETY REQUIREMENTS Sears rotary walk-behind power lawn mowers conform to the safety standards of the

Ameri^n National Standards Institute and the U.S. Consumer Product Safety Commisslon. 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. Mulcher doc»' - allows conversion to discharge or bagging operation.

Primer • pumps additional fuel from the carburetor to the cylinder for use when starting a cold engine. Starter Handle - used for starting the

6 engine.

BgggQM The operation of any lawn __

mower can result in foreign

Always wear safety glasses or eye shields while operating your lawn mower or performing any adjustments or repairs. We recommend a wide vision safety mask over spectacles or standard safety glasses.

objects thrown into the eyes, which can result in severe eye damage.

HOWTO USE YOUR LAWN MOWER

ENGINE SPEED

The engine speed was set at the factory for optimum performance. Speed is not adjustable.

ENGINE ZONE CONTROL

ACAUTION: Federal regulations require

an engine control to be installed on this lawn mower in order to minimize the risk of blade contact injury. Do not under any

circumstances attempt to defeat the function of the operator control. The blade turns when the engine is mnning.

• Your lawn mower is equipped with an operator presence controi bar which requires the operator to be positioned behind the lawn mower handle to start and operate the lawn mower.

TO ADJUST CUTTING HEIGHT

Raise wheels for low 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 plate tabs.

Lower Wheels for High Cut Plate Tab

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.

SIDE DISCHARGING

• Rear door must be closed.

• Open mulcher door and install dis charge deflector under guard 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 -

1. 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.

^CAUTION: Do not run your lawn mower without rear door closed or approved grass catcher in place. Never attempt to operate the lawn mower with the rear door removed or propped open.

Mulcher door

Open mulcher door

NOTE: Allow oil to settle down into engine

for accurate reading. To read proper level,

tighten engine oil cap, then remove It to read the dipstick.

3. Reinstall engine oil cap and tighten.

• 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

NOTE: Before filling fuel tank, remove and discard the debris plug that is inside

the tank.

• Fill fuel tank. Use fresh, clean, regular unleaded gasoline with a minimum of 87 octane. Do not mix oil with gaso line. Purchase fuel in quantities that can be used within 30 days to assure fuel freshness.

AWARNING: Experience indicates that 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.

A CAUTION: Fill to bottom of gas tank filler neck. Do not overfill. Wipe off any spilled oil or fuel. Do not store, spill or use gasoline near an open flame.

BEFORE STARTING ENGINE

ADD OIL Your lawnmower is shipped without oil in

the engine. Engine holds 20 oz. of oil. For type and grade of oil to use, see “ENGINE’ in Maintenance section of this

manual.

1. Be sure lawnmower is level and area around oil fill is clean.

2. Remove engine oil cap and fill to the full line on the dipstick. Pour oil slowly. Do not over fill.

то ?TART ENGINE

NOTE; Due to protective coatings on the

engine, a small amount of зггюке may be

present during the initiai use of the product and should be considered normal.

1. To start a cold engine, push primer three (3) times before tr^ng to start. Use a firm push. This step is not usually necessary when starting an engine which has already run for a few minutes.

2. Hold operator presence control bar down to the handle and pull starter

handle quickly. Do not allow starter rope to snap back.

TO STOP ENGINE

• To stop engine, release operator presence control bar.

NOTE: In cooler weather it may be necessary to repeat priming steps. In warmer weather over priming may cause flooding and engine will not start. If you do flood engine, wait a few minutes before attempting to start and do not repeat priming steps.

MOWINGTIPS

• Under certain conditions, such as very tall grass, it may be necessary to raise the height of cut to reduce pushing effort and to keep from overtoading the engine and leaving clumps of grass clippings. It may also be necessary to reduce ground speed and/or run the lawn 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 dippings 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 №at as they fall

onto the lawn 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 dumps of mulched grass. For extremely heavy mulching, reduce your width of cut, mow slowly and raise the rear of the lawn mower one wheel adjuster setting higher than the front.

• 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 wilt help prevent matting and graining of the lawn.

FILL IN DATES AS YOU COMPLETE

MAINTENANCE

Check for Looee Fasteners ClearVInspect Grass CatcLier

Of Equipped) Clean Lawn Mower Clean Under Drive Cover

(Power-Propelled Mowers) Check drive belVpulleys

iPower-PfOpelled Mowers) Check/Sharpen^eplace Blade

Lubrication Chart

Clean Battery/Ftecharge (Electric Start Mowers)

Check Engine Oil Level

Change Engine OH Clean Air Filter

Inspect Muffler

Clean or Replace Spark Plug Replace Air Filter Paper Cartridge

1 - Chand« more oflAn when operating under a heavy bad or in high ambient temperatures. 2 - Service more often when operating in dirty or dusty conditions. 3 - Replace blades more often when rnowing in sandy soil. 4 - Charge hours at end at season.

✓ ✓ ✓

GENERAL RECOMMENDATIONS

The warranty on this lawn mower does

not cover items that have been subjected to operator abuse or negligence. To receive full value from the warranty, operator must maintain mower as

instructed in this manual.

Some adjustments will need to be made

periodically to property maintain your

unit.

All adjustments in the Service and

Adjustments section of this manual

should be checked at least once each

season.

• Once a year, replace the spark plug, clean or replace air filter element and check blade for wear. A new spark plug and clean/new air filter element assure proper air-fuel mixture and help your engine run better and last longer.

• Follow the maintenance schedule in this manual.

BEFORE EACH USE

1. Check engine oil level.

2. Check for loose fasteners.

LUBRICATION

Keep unit well lubricated {See "LUBRI CATION CHART").

✓

✓ s

✓ »/a

a/2

✓

✓ i

LUBRICATION CHART

0 Spray lubricant

® See "ENGINE" in Maintenance section.

IMPORTANT: Do not oil or grease

plastic wheel bearings, viscous lubri cants wll attract dust and dirt that will shorten the life of the self-lubricating bearings. If you feel they must be lubricated, use only a dry, powdered

■|Q graphite type lubricant sparingly.

PRODUCT SPECIFICATIONS

SERIAL NUMBER: DATE OF PURCHASE: GASOLINE CAPACITY/TYPE: OIL TYPE (API-SF-SJ):

1.6 QUARTS UNLEADED REGULAR SAE 30 (ABOVE 32'F)

SAE5W-30 (BELOW 32“F) OIL CAPACITY: 20 OZS. SPARK PLUG(GAP: .030")

BLADE BOLT TORQUE:

CHAMPION RJ19LM OR J19LM

35-40 FT. LBS.

• The model and serial numbers will be found on a decal attached to the rear of the

lawn mower housing. Record both serial number and date of purchase in the space protnded above.

LAWNMOIA/ER

Always observe safety rules when perform ing any maintenance.

TIRES

• Keep tres free of gasoine, oil, or insect control chemicals which can harni rubber.

• Avoid stimps, stones, deep ruts, sharp objects and other hazards that may cause tire damage.

BLADE CARE

For best results, mower blade must be

kept sharp. Replace bent or damaged

blades.

TO REMOVE BLADE

1. Disconnect spark plug wire from spark plug and place wire where it cannot

come in contact with spark plug.

2. Turn lawn mower on its side. Make sure air filter and carburetor are up.

3. Use a wood block between blade and mower housing to prevent blade from

turning when removing blade bolt. NOTE: Protect your hands with gloves and/or wrap blade with heavy cloth.

4. Remove blade bolt by turning counter*

clockwise.

5. Remove blade and attaching hard

ware (bolt, lock washer and hardened

washer). NOTE: Remove the blade adapter and check the key inside hub of blade adapter. The key must be in good condi tion to work property. Replace adapter if damaged.

TO REPLACE BLADE

1. Position the blade adapter on the engine crankshaft. Be sure key in adapter and crankshaft keyway are aligned.

2. Position blade on the blade adapter aligning the two (2) holes in the blade with the raised lugs on the adapter.

3. Be sure the trailing edge of blade (opposite sharp edge) is up toward the engine.

4. Install the blade bolt with the lock washer and hardened washer into blade adapter and crankshaft.

5. Use block of wood between blade and lawn mower housing and tighten the

blade bolt, turning clockwise.

• The recommended tightening torque is

35-40 ft lbs. IMPORTANT: Blade bolt is grade 8 heat treated.

Blade adapter

Key

Lockwasher

Blade

Blade \ |\r^ bolt Hardened ^ ^

washer Trailing edge Biade adapter

Crankshaft

keyway

TO SHARPEN BLADE

NOTE: We do not recommend sharpen ing blade - but if you do, be sure the blade is balanced. Care should be taken to keep the blade balanced. An unbalanced blade will cause eventual damage to lawn mower or engine.

• The blade can be sharpened with a file or on a grinding wheel. Do not attempt to sharpen while on the mower.

• To check blade balance, drive a nail into a beam or wall. Leave about one inch of the straight nail exposed. Place center hole of blade over the head of the nail. If blade is balanced, it should

remain in a horizontal position. If either end of the blade moves downward, sharpen the heavy end until the biade

is balanced.

GRASSCATCHER

• The grass catcher may be hosed with water, but must be dry when used.

• Check your grass catcher often for

damage or deterioration. Through normal use it will wear. If catcher needs replacing, replace only with a manufacturer approved replacement catcher. Give the lawn mower model

number when ordering.

ENGINE

LUBRICATION Use only high quality detergent oil rated

with API service classification SF-SJ.

Select the oil's SAE viscosity grade according to your expected operating temperature.

SAE VISCOSITY GRADES

ay 32* -w

TEMPERATURE RAHG£ BEFORE NEXT OIL CHANGE

NOTE: Although multi-viscosity oils

(5W30, 10W30 etc.) improve starting in cold weather, these multi-viscosity oils will result in increased oil consumption when used above 32°F. Check your

engine oil level more frequently to avoid

possible engine damage from running

low on oil.

Change the oil after every 25 hours of operation or at least once a year if the

lawn mower is not used for 25 hours in

one year.

Check the crankcase oil level before starting the engine and after each five (5) hours of continuous use. Tighten oil plug securely each time you check the oil

level.

TO CHANGE ENGINE OIL

NOTE: Before tipping lawn mower to drain oil, drain fuel tank by running engine until fuel tank is empty.

1. Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug.

2. Remove engine oil cap; lay aside on a clean surface.

3. Tip lawn mower on its side as shown

and drain oil into a suitable container. Rock lawn mower back and forth to remove any oil trapped inside of engine.

4. Wipe off any spilled oil on lawn mower and on side of engine.

5. Fill engine with oil. {See “ADD OIL” in the Operation section of this manual).

6. Reconnect spark plug wire to spark plug.

AIR FILTER

Your engine wiN not run properly and may

be damaged by using a dirty air filter. Replace the air filter every 100 hours of operation or every season, more often if you mow in very dusty, dirty condiOons.

TO CLEAN AIR FILTER

1. Loosen screw and tilt cover to remove.

2. Carefully remove cartridge.

3. Clean by gently tapping on a flat surface. If very dirty, replace cartridge.

^CAUTION; Petroleum solvents, such as kerosene, are not to be used to clean cartridge. They may cause deterioration of the catiridge. Do not oii cartridge. Do not use pressurized air to clean or dry cartridge.

4. Instali cartridge, then replace cover making sure the tabs are aligned with the slots in the back plate. Fasten screw securely.

Back plate

Cartridge Cover

MUFFLER Inspect and replace corroded muffler as it

could create a Are hazard and/or dam age. SPARK PLUG

Replace spark plugs at the beginning of each mowing season or after every 100 hours of operation, whichever occurs first.

Spark plug type and gap setting are shown in “PRODUCT SPECIFICATIONS' in Maintenance section of this manual.

SERVICE AND ADJUSTMENTS

Cover

tabs

CLEANING

IMPORTANT: For best performance, keep mower housing free of built-up

grass and trash. Clean the underside of

your mower after each use. ^CAUTION: Disconnect spark plug wire from spark plug and place wire where it cannot come in contact with spark plug,

• Clean the underside of your lawn mower by scraping to remove build-up of grass and trash.

• Clean engine often to keep trash from accumulating. A dogged engine runs hotter and shortens engine life.

• Keep finished surfaces and wheels free of all gasoline, oil,etc.

• We do not recommend using a garden

hose to clean lawn mower unless the

electrical system, muffler, air filter and

carburetor are covered to keep water out. Water in engine can result in shortened engine iife.

ACAUTION; Before performing any

service or adjustments:

1. Release control bar and stop engine.

2. Make sure the blade and all moving parts have completely stopped.

3. Disconnect spark plug wire from spark plug and place where it cannot come in contact with plug.

LAWN MOWER

TO ADJUST CUTTING HEIGHT See 'TO ADJUST CUTTING HEIGHT’ in

the Operation section of this manual.

REAR DEFLECTOR

The rear deflector, attached between the

rear vt^eels of your mower, is provided to

minimize the possibility that objects will

be thrown out of the rear of the mower into the operator mowing position. If the

deflector becomes damaged, it should be

replaced. TO ADJUST HANDLE The handle can be mounted in a high or low position. The mounting holes in the bottom of lower handle are off center for raising or lowering the handle.

1. Remove upper handle and all parts attached to lower handle.

2. Remove hairpin cotters from lower

handle bracket mounting pin.

3. Squeeze lower handle in to remove it

from mounting pins.

4. Turn lower handle over to raise or lower handle.

5. Squeeze lower handle in and position holes onto mounting pins on handle bracket.

6. Reassemble upper handle and all parts removed from lower handle.

TO ASSEMBLE GRASS CATCHER

' 1. Put grass catcher frame into grass bag

with rigid part of bag on the bottom.

Make sure the frame handle is outside of the bag top.

2. Slip vinyl bindings over frame. NOTE: If vinyl bindings are too stiff, hold them in warm water for a few minutes, if bag gets wet, let it dry before using.

ACAUTION; Do not run your lawn mower without clipping deflector or approved grass catcher in place. Never attempt to operate the lawn mower with the rear door removed or propp>ed open.

Frame

opening

STORAGE

ENGINE

ENGINE SPEED

Your engine speed has been fiactory set.

Do not attempt to increase engine speed

or it may result in personal injury. If you

believe that the engine is running too fast

or too slow, take your lawn mower to a

Sears or other qualified service center for repair and adjustment.

CARBURETOR

Your carburetor has a non-adjustable fixed main jet for mixture control. If your

engine does not operate properly due to suspected carburetor problems, take your

lawn rnower to a Sears or other qualified

service center for repair and/or adjust

ment. IMPORTANT: Never tamper with the engine governor, which is factory set for proper engine speed. Overspeeding the engine above the factory high speed setting can be dangerous. If you think the engine-governed high speed needs adjusting, contact a Sears or other qualified service center, which has proper equipment and experience to make any necessary adjustments.

Immediately prepare your lawn mower for storage at the end of the season or if the unit will not be used for 30 days or more.

LAWN MOWER

When lawn mower is to be stored for a

period of time, clean it thoroughly, remove all dirt, grease, leaves, etc. Store in a

clean, dry area.

1. Clean entire lawn mower (See "CLEANING" in the Maintenance section of this manual).

2. Lubricate as shown in the Mainte nance section of this manual.

3. Be sure that all nuts, bolts, screws, and pins are securely fastened. Inspect moving parts for damage, breakage and wear. Replace if necessary.

4. Touch up all rusted or chipped paint surfaces: sand lightly before painting.

HANDLE You can fold your lawn mower handle for

storage.

1. Squeeze the bottom ends of the lower handle toward each other until the lower handle clears the handle bracket, then move handle forward.

2. Loosen upper handle mounting bolts enough to allow upper handle to be folded back.

IMPORTANT: When folding the handle for storage or transportation, be sure to fold the handle as shown or you may damage the control cables.

• When setting up your handle from the

storage position, the lower handle will

automatically lock into the mowing

position.

FUEL SYSTEM IMPORTANT: It is important to prevent

gum deposits from forming in essential fuel system parts such as carburetor, fuel filter, fuel hose, or tank during storage. Also, experience indicates that 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,

1. Drain the fuel tank.

2. Start the engine and let it run until the fuel lines and carburetor are empty.

• Never use engine or carburetor cleaner products in the fuel tank or permanent damage may occur.

• Use fresh fuel next season.

NOTE: Fuel stabilizer is an acceptable alternative in minimizing the formation of fuel gum deposits during storage. Add stabilizer to gasoline In fuel tank or storage container. Always follow the mix ratio found on stabilizer container. Run engine at least 10 minutes after adding stabilizer to allow the stabilizer to reach the carburetor. Do not drain the gas tank and carburetor if using fuel stabilizer,

ENGINE OIL

Drain oil (with engine warm) and replace

with clean engine oil. (See "ENGINE" in

the Maintenance section of this manual).

CYLINDER

1. Remove spark plug,

2. Pour one ounce (29 ml) of oil through spark plug hole into cylinder.

3. Pull starter handle slowly a few times to distnbute oil.

4. Replace with new spark plug,

OTHER

• Do not store gasoline from one season

to another.

• Replace your gasoline can if your can starts to rust. Rust and/or dirt in your gasoline will cause problems.

• If possible, store your unit indoors and cover it to give protection from dust and dirt.

• Cover your unit with a suitable protec

tive cover that does not retain moisture. Do not use plastic. Plastic cannot breathe, which allows condensation to

form and wilt cause your unit to rust. IMPORTANT: Never cover mower while engone and exhaust areas are still warm. A CAUTION:Never store the lawn mower with gasoline in the tank inside a building where fumes may reach an open flame or spark. Allow the engine to cool before storing in any enclosure.

TROUBLESHOOTING CHART

PROBLEM

Does not start

CAUSE

1. Dirty air filter. 2, Out of fuel.

3. Stale fuel.

4. Water in fuel.

5. Spark plug wire is disconnected.

6. Bad spark plug.

7. Loose blade or broken Made adapter.

8. Control bar in released position.

9. Control bar defective.

CORRECTION

1. Clean/replace air filter.

2. Fill fuel tank.

3. Drain tank and refill with fresh clean fuel.

4. Drain fuel tank and carburetor and refill tank with fresh gasoline.

5. Connect wire to plug.

6. Replace spark plug.

7. Tighten blade bolt or

replace blade adapter.

8. Depress control bar to

handle.

9. Replace control bar.

Loss of power

Poor cut uneven

Excessive

vibration

Starter rope hard 1. Engine flywheel brake is on to puli

1. Rear of lawn mower housing or cutting blade dragging in heavy grass.

2. Cutting too much grass.

3. Dirty air filter.

4. Buildup of grass, leaves, and trash under mower. housing.

5. Too much oil in engine.

6. Walking speed too fast.

1. Worn, bent or loose blade.

2. Wheel heights uneven.

3. Buildup of grass, leaves and trash under mower.

1. Worn, bent or loose blade.

2. Bent engine crankshaft.

when control bar is released

2. Bent engine crankshaft.

3. Blade adapter broken.

4. Blade dragging in grass.

1. Set to “Higher Cut’ position.

2. Set to “Higher Cut" position.

3. Clean/replace air filter.

4. Clean underside of mower

5. Check oil level.

6. Cut at slower walking speed.

1. Replace blade. Tighten blade bolt.

2. Set all wheels at same height.

3. Clean underside of mower housing.

1. Replace blade. Tighten

blade bolt.

2. Contact a Sears or other

qualified service center.

1. Depress control bar to upper handle before pulling starter rope.

2. Contact a Sears or other qualified service center.

3. Replace blade adapter.

4. Move lawn mower to cut grass or to hard surface.

TROUBLESHOOTING CHART

PROBLEM

CAUSE

CORRECTION

Grass catcher

notf]lling(lfso

equipped)

Hard to push

1. Cutting height too low.

2. Lift on blade worn off.

3. Catcher not venting air.

1. Grass is too high or wheel height is too low.

2. Rear of lawn mower housing or blade dragging in grass.

3. Grass catcher too full.

4. Handle height position not right for you.

1. Raise cutting height.

2. Replace blade.

3. Clean grass catcher.

1. Raise cutting height.

2. Raise rear of lawn mower housing one (1) setting higher.

3. Empty grass catcher.

4. Adjust handle height to suit.

CRAFTSMAN ROTARY LAWN MOWER - MODEL NUMBER 917.388721

..1 -3

40 _39

КЕГ

PART

NO. NO. 1

86902

169709X479

169708X479

132001

63601

131959

7 66426

154132

165754

176556

750634

86899X004

136378 15 51793 16 147286 IT

165946X479 IS

17600406

19 167132X004

20 167133X004 21

165856

168360X004

166875

751153

166111X479

166112X479 27 851656 28

152124 29

160835X007 30

19112222 31

165760 32 169421X004

87877

165762X004

CRAFTSMAN ROTARY LAWN MOWER - - MODEL NUMBER 917.388721

KEY

DESCRIPTION

Control Bar UpperHandle LowerHandle Rope Guide Locknut 1/4-20 Handle Boll WkeTie Hinge Bracket MulcherDoor Engine Zone Control Cable Hex Washer Head Screw Up-Stop Bracket Handle Knob

Hairpin Cotter Hinge Rod Support Bracket

Saem

Axle Arm Assembly - LF Axle Arm Assembly - RF Rear Skirt Selector Spring - Front Roar Door Assembly Kit (Ind. Springs) Locknut 5/16-18 Handle Bracket Assembly (Left) Handle Bracket Assembly (Right) Screw 1/4-ZO X 3/8 Hinge Spring Wheel Adjusting Bracket - Front Spacer Clip on Discharge Guard Selector Spring - Rear Selector Knob

Axle Arm Assembly - LR

PART

NO.

NO. DESCRIPTION

36 160828 Shoulder Boll 5/16-18 37 151157 Wheel Assembly 39 83923 Flanged Locknut

77400 Hub»p 41 88652 Hinge Screw 42

165766 Spring (LH) 43 165767 44 165912 45 150406

46 85463 48

165761X004 Axle Arm Assembly - RR

52 166878 Housing Assembly

851084

53 54 850263 Helical Lockwasher 55 851074 HardenedWasher 56 175064 21" Blade 57 851514 BladeAdapter 67 166113 Grass Bag 68 165755

—

132004

- -

161058 Warning Decal (Not Shown)

- -

178935 Owner's Manual

Available accessories not Included with lawn mower:

Z133623 Gas Can (2.5 gal.) 1133500 Fuel Stabilizer 1133000 SAE SOW on (20 OZ.)

NOTE: All component dimensions given in U.S. inches.

1 inch = 25.4 mm

Spring (RH) Door BoK Hex Head Thread Rolling Screw 3/8-16x1 Danger Decal

(Includes Key Numbers 17,18 and 46) Hex Head Screw 3/8-24 x 1-3/6 Grade 8

Catcher Frame Engine. Briggs & Stratton, Model Number 12H602-2639-B1 (See Breakdown)

Nut, Hex

BRIGGS & STRATTON 4-CYCLE ENGINE

MODEL NUMBER 12H802-2639-B1

* REQUIRES SPECIAL TOOLS ISj

TO INSTALL, SEE REPAIR INSTRUCTION MANUAL,

fiosa OWNER'S manual!

20^

22i

3RIGGS & STRATTON ».CYCLE ENGINE MODEL NUMBER 12H802-2639-B1

443

BRIGGS & STRATTON 4-CYCLE ENGINE

MODEL NUMBER 12H802-2639-B1

I 1036 EMISSIONS LABEL

BRIGGS & STRATTON 4-CYCLE ENGINE MODEL NUMBER 12H802-2639.B1

356

3341

745 f

BRIGGS & STRATTON 4-CYCLE ENGINE

MODEL NUMBER 12Ha02>2639-B1

PART

KEY NO. NO.

493260 Cylinder Assembly SO

399269 Kll-Bushing/Seal 51

2 3 299819 • Seal-Oil (Magneto Side)

4 493279 Sump-Engine 56 691421

5 691160

692249 •+ Gasket-Cylinder Head

69S2S0 Breather Assembly 60

8 9 272481 10 691125

691781 Tube-Breather

11 12 692232 ■ Gasket-Crankcase 97 13 690912 Saew (Cylinder Head) IS 691680 16 691451 20 399781 • Seal-Oil (PTO Side) 22 691092 23 692315 Flywheel 127 24 222698 Key-Flywheel 130 25 499429 Piston Assembly (Standard) 133

499430

499431 499432 Piston Assembly (.030" O.S.)

26 499425 Ring Set-Piston (Standard)

499426 Ring Set-Piston (.010" O.S.) 163

499427 Ring Set-Piston .Q20”O.S.) 187

499428 Ring Set-Piston (.030’ O.S.)

27 691866

499423

28 29 499424 Rod-Connecting 202 691829 LInk-MechanIcal Governor 32 691664 Screw (Connecting Rod)

695759

32A 33 262651 Valve-Exhaust 227 34 262652 35 691270 36 691270 40 692194 Retainer-Valve 304 695892 Housing-Blower 43 691997 Slinger-Govemor/Oil 306 45 690548 Tappet-Valve 306 46 691449 48 498826

DESCRIPTION

Head-Cylinder

•+ Gasket-Breather Screw (Breather Assembly)

Ptug-Oll Drain Crankshaft

Screw (Engine Sump)

Piston Assembly (.010” O.S.)

Piston Assembly (.020” O.S.)

Lock-Piston Pin Pin-Piston

Screw (Connecting Rod) Valve-intake

Spring-Valve (Intake) Spring-Valve (Exhaust)

Camshaft

Short Block (Replacement 332 690662

Engine 12J802-2915-B1)

KEY

PART

NO.

NO. 497465 Manifold-Intake

272199 ■ Gasket-Intake 691650 Screw (Intake Manifold)

692259 Rope-Starter (Cut to

281434 Grip-Starter Rope 690759 Screw (Ftewlnd Starter)

691740 Lock-Muffler Screw

691636 Screw (Throttle Valve)

493267 Shaft-Throttle

104 691242 0 Pin-Float Hinge

494870 Jet-Main (Standard)

117

497315 Jet-Main (High Altitude) 498260

121 125 498170

694468 0 Plug-Welch 691203 Valve-Throttle 398187 398188 0 Valve-Needte/Seat

134

137 693981 0± Gasket-Float Bowl 146 690979 Key-Timing 159 691753 Brackel-AIr Cleaner Primer

2726S3-0± Gaskel-AIr Cleaner 691050 Line-Fuel (Cut to Required

690877 Screw (Control Bracket)

138

190 690940 209 690319 Spring-Governor

222 692467 Bracket-Control

690783 271716 0t Sealing Washer

276

690940

287

300 692038

691108 690450

307 690345 Screw (Cylinder Shield)

333 802574 Armature-Magneto

DESCRIPTION

Houskig-Rewind Starter Required Length)

Kll-Carburetor Overhaul

Carburetor

Float-Carburetor

Length) Screw (Fuel Tank)

Control Lever-Governor Screw (Dipstick Tube)

Muffler Screw (Blower Housing)

Shield-Cylinder Nut (Fk^neel)

BRIGGS & STRATTON 4-CYCLE ENGINE

KEY PART KEY PART NO. NO.

334 691061 Screw (Armature Magneto) 847 692017 337

802592 356 692390 368 497316 Engine Gasket Set 870 690380

363 19069 Flywheel Puller 871 262001 Bushlng-Gulde (Exhaust)

365

692524 383 89838 Wrench-Spark Plug 921 497233 Cover-Blower Mousing

404 690272 Washer (Governor Crank) 922 692135 Spring-Brake

425

690670 Screw (Air Cleaner Cover) 923 443

692523 Screw (Air Cleaner Base) 957 397974 Cap-Fuel Tank 445

491588 Fllter-AIr Cleaner Cartridge 966 496116 455

691219 Cup-Flywheel 968 692293 Cover-Air Cleaner 456

692299 459

281505 505

231082 523

495264 DIpsNck (Air Cleaner Primer Bracket) 324

692296 • 525

495265 529

691923

562

92613 Bolt (Governor Control Lever) 977 498261 Set-Carburetor Gasket

584

692342 Cover-Breather Passage 1019 494256 Kit-Label

585

691879 • Gasket-Breather Passage 1036 695111

592

690800 Nut (Rewind Starter) 1058 274265 Owner's Manual

597

691696 Screw (Pawl FricHon Plate) 1059 692311 Kit-Screw/Washer Ì01 95162 Clamp-Hose 508

497680

;i3

691340 ;15

690340 ;i6

691306 Crank-Governor >17

270344 0t Seal-0 Ring (Intake Manifold) >21 692310 Switch-Stop ■ Included In Engine Gasket Set, Key #358

>35

66538 Boot-Sparkplug Ì68

493823 • Spacer (Includes 2) 0 Included In Carburetor Overhaul Kit, Key #121

170

692294

i84

690345 Screw ± Included in Carburetor Gasket Set, Key #977

i89

691855

691321 0t

'41

691830 Gear-Timing NOTE: All component dimensions given In U.S.

691031 • Seal-O Ring (DipsNck Tube) Inches 1 inch = 25.4 mm

DESCRIPTION NO. NO. DESCRIPTION

Spark Plug 851 493880 Terminat^parkplug

Wire-St(TO

Screw (Carburetor) 63709

Plate-Pawl Friction Pawl-Ratchet Nut (Governor Control Lever)

Seal-Dipstick Tube 972 Tube-DIpstIck Grommet

Starter-Rewind Screw (Muffler) Retainer-Governor Shaft 1211

Spacer-Fuel Tank

(Breather Passage Cover) Spring-Friction Seat-Throttle Shaft

869 691155

969 690700 Screw 970 691669

975 493640 Bowl-Float 976 496115

1095 498528

1210 498144

**■ Included in Valve Overhaul Kit, Key #1095

MODEL NUMBER 12H802'2639'B1

Assembly-DI pstIck/Tuba Seat-Valve (Intake)

Seat-Valve (Exhaust) Bushing-Guide (Intake)

695891 Brake

Base-Air Cleaner Primer

(Blower Housing Cover) Screw

495224 Tank-Fuel

Primer-Carburetor

Label-Emissions

Set-Valve Gasket Assembly-Pulley/Spring

498144 Assembly-Pulley/Spring

(Pulley) (Spring)

SERVICE NOTES

Get it fixed, at your home or ours!

For repair of ma|or brand appliances in your own home...

no matter who made it, rro matter vdio sold it!

1-800-4-MY-HOME® Anyfime, day or night

a-800-469-4663) (USA and Canada) www.5eaisxom wwwjseeisxa

For repair of cartynn products like vacuums, lawn equipment, and

electronics, call for the nearest Sears Parts and Repair Center.

1-800-488-1222 AnyUne, day or ri^ (U.S A only)

■

For the replacement parts, accessories and owneris manuals

that you need to do-it-yourself, call Sears PartsDirecP'!

■ *

1-800-366-PART

(1-8CKK366-7278)

www.s6ars.com

6a.m.-11 pm., Tdaysavieek

(U.SAonly)

www.searsconVpart8direct

Para pedr servido de leparadôn a

domicio, y para ordenar piezas:

To purchase or inquire about a Sears Service Agreement

or Sears Maintenance Agreement

1-800-827-6655 (U.S.A)

7 am. -5 p.m., CST, Mon. - SaL 9 a.m. - 8 pm EST, M - F, 4 p.m. Sat

1-800-361-6665 (Canada)

Au Canada pour service en fiançais;

1-atKH-E-«)YER“®

1-888-SU+IOGAR™

(1-888-784-6427)

(1-80O63S693T)

www.searsxa

BEAIR^

HomeCentral®

) Registered Trademark / ™ Trademark / Service Mark of Sears, Roebuck and Co. ) Marca Registrada / ™ Marca de Fábrica I Marca de Servido de Sears, Roebuck and Co.

Marque de commerce I ™ Merque déposée de Sears, Roebuck and Co.

178935 02.27.01 BY

_______________________

Printed in U.S.A.

Craftsman 917.388721 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

6.0 HORSEPOWER 21" MULTI-CUT

ROTARY LAWN MOWER

CAUTION:

TABLE OF CONTENTS

WARRANTY

SAFETY RULES

ACCESSORIES

ASSEMBLY

OPERATION

MAINTENANCE

SERVICE AND ADJUSTMENTS

STORAGE