Craftsman 37763 User manual

Brand: Craftsman

Model: 37763

Category: Lawnmowers

Type: User manual

This manual is also suitable for

917.377631

Owner's Manual

CRAFTSMAN+

6.75 HORSEPOWER

21" REAR DISCHARGE

POWER PROPELLED

ELECTRIC START

ROTARY LAWN MOWER

Model No.

917.377631

• Safety

• Assembly

• Operation

• Maintenance

• Espa_ol

• Repair Parts

CAUTION:

Read and follow all

Safety Rules and Instructions

before operating this equipment

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

W_rrat_

S_fety_lules

A_ern_ly

Ol_era|on

M_intel_ance Sihelule|

M_intelhanle

2 Product Specifications 11

2 Service and Adjustments 14

4 Storage 14

6 Troubleshooting 16

10 Repair Parts 34

10 Parts Ordering Back Cover

ON CRAFTSMAN POWER MOWER

purchase, when this Craftsman Lawn Mower is maintained,

according to the operating and maintenance instructions inthe

repair free of charge any defect in material or workmanship.

is used for commercial or rental purposes, this warranty

the date of purchase.

worn during normal use, such as rotary mower

:3 ;,air cleaners and spark plug.

• operator abuse or negligence, including bent crank- _

shafts arld,the failure to the equipment according to the instructions con-

tained in the owner's manual.

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

Sears Service Center/Department inthe 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, ROEBUCKAND CO., D/817 WA, HOFFMAN ESTATES, ILLINOIS 60179

TRAINING:

• Read this operator's manual carefully.

Become familiar with the controls and

know how to operate your mower

properly. Learn how to quickly stop

mower.

• Do not allow children to use your mower.

Never allow adults to use mower without

proper instructions.

• Keep the area of operation clear of all

persons, especially small children and

pets.

• Use mower only as the manufacturer

intended and as described in this manual.

• Do not operate mower if ithas been

dropped or damaged in any manner.

Always have damage repaired before

using your mower.

• Do not use accessory attachments that

are not recommended by the manufac-

turer. Use of such attachments may be

hazardous.

• The blade turns when the engine is

running.

PREPARATION:

• Always thoroughly check the area to be

mowed and clear itof all stones, sticks,

wires, bones, and other foreign objects.

These objects will be thrown by the blade

and can cause severe injury.

• Always wear safety glasses or eye

shields when starting and while using

your mower.

• Dress properly. Do not operate mower

when barefoot or wearing open sandals.

Wear only solid shoes with good trac_tion

when mowing.

• Check fuel tank before starting engine.

Do not fill gas tank indoors, when the

engine is running or when the engine is

hot. Allow the engine to cool for several

minutes before fillingthe gas tank. Clean

off any spilled gasoline before starting the

engine.

• Always make wheel height adjustments

before starting your mower. Never

attempt to do this while the engine is

running.

• Mow only in daylight or good artificial

light.

OPERATION:

• Keep your eyes and mind on your mower

and the area being cut. Do not let other

interests distract you. ---

• Do not mow wet or slippery grass. Never

run while operating your mower. Always

be sure of your footing -- keep a firm

hold on the handles and walk.

• Do not put hands or feet near or under

rotating pads. Keep clear of the discharge

opening at all times.

• Always stop the engine whenever you

leave or are not using your mower, or

before crossing driveways, walks, roads,

and any gravel--covered areas.

• Never direct discharge of material toward

bystanders nor allow anyone near the

mower while you are operating it.

• Before cleaning, inspecting, or repairing

your mower, stop the engine and make

absolutely sure the blade and all moving

parts have stopped. Then disconnect the

spark plug wire and keep it away from the

spark plug to prevent accidental starting.

• Do not continue to run your mower ifyou

hit a foreign object. Follow the procedure

outlined above, then repair any damage

before restarting and operating you

mower.

• Do not change the govemor settings or

overspeed the engine. Engine damage or

personal injurymay result.

• Do not operate your mower if it vibrates

abnormally. Excessive vibration is an

indication of damage; stop the engine,

safely check for the cause of vibration

and repair as required.

• Do not run the engine indoors. Exhaust

fumes are dangerous.

• Never cut grass by pulling the mower

towards you. Mow across_e fame_f--

slopes, never up and down or you might

lose your footing. Do not mow exces-

sively steep slopes. Use caution when

operating the mower on uneven terrain or

when changing directions -- maintain

good footing.

• Never operate your mower without proper

guards, plates, grass catcher or other

safety devices in place.

MAINTENANCE AND STORAGE:

• Check the blade and the engine mounting

bolts often to be sure they are tightened ,.,.

properly.

• Check all bolts, nuts and screws at

frequent intervals for proper tightness to

be sure mower is in safe working

condition.

• Keep all safety devices in place and

working.

• To reduce fire hazard, keep the engine-

free of grass, leaves or excessive grease

and oil.

• Check grass catcher often for deteriora-

tion and wear and replace wom bags.

Use only replacement bags that are

recommended by and comply with

specifications of the manufacturer of your

mower.

• Always keep a sharp blade on your

mower.

• Allow engine to cool before storing in any

enclosure.

• Never store mower with fuel inthe tank

inside a building where fumes may reach

an open flame or an-ignition-source such

as a hot water heater, space heater,

clothes dryer, etc.

CAUTION: 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.

WARNING

The engine exhaust from this product

contains chemicals known to the State of

C_);fornia to cause cancer, birth defects, or

oth_r reproductive harm.

Theseaccessorieswereavailablewhenthislawnmowerwasproduced.Theyar_so

availableatmostSearsretailoutletsandservicecenters.MostSearsstores can also oerc_

repair partsfor you,when you providethe model number of your lawn mower. Some of these

accessoriesmay notapplytoyour lawn mower.

LAWN MOWER PERFORMANCE

CUPPING DEFLECTOR

FOR REAR DISCHARGE LAWN MOWERS

GRASS CATCHERS

FOR

REAR DISCHARGE

LAWN MOWERS

MULCHER KITS

GRASS CATCHERS

FOR "

SIDE DISCHARGE

LAWN MOWERS +-

STABlUZER

GAS CANS

LAWN MOWER MAINTENANCE

MUFFLERS AIR FILTERS

BELTS BLADES

BLADE ADAPTERS WHEELS

SPARK PLUGS

ENGINE OIL

Read these instructions and this manual in

its entirety before you attempt to assemble

or operate your new lawn mower. Your

new lawn mower has been assembled at

the factory with the exception of those

parts left unassembled for s_ipping

purposes. 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.

All parts such as nuts, washers, bolts, etc.,

necessary to complete the assembly have

been placed in the parts bag.

TO REMOVE LAWN MOWER FROM

CARTON

• Remove loose parts included with

mower.

• Cut down two end corners of carton and

lay end panel down flat.

• Remove all packing materials except

padding between upper and lower

handle and padding holding operator

presence control bar to upper handle.

Roll lawn mower out of carton and check

carton thoroughly for additional loose

pads.

HOW TO SET UP YOUR LAWN

MOWER ......... -.....

TO UNFOLD HANDLE

IMPORTANT: Unfold handle carefully so

as not to pinch or damage control cables.

• Raise lower handle section to operating

position and squeeze the bottom ends of

lower handle towards each other until

the pin in handle can be inserted into

one of the three height adjustment

holes.

• Remove protective padding, raise upper

handle section into place on lower

handle and tighten both handle knobs.

• Remove any packing material from

around control bar.

• Your handles may be adjusted for your

mowing comfort. Refer to Service and

Adjustments section of this manual.

Operator presence

control,bar

Upper handle

Lower

handle

3-position

Handle

adjustment

bracket

Mowing

position

Handle

TO INSTALL ATTACHMENTS

Your lawn mower was shipped ready to be

used as a mulcher. To convertto4N_jgirlg

or discharging:

• Open rear door and remove mulcher

plug. Store mulcher plug in a safe

place.

• You can now install catcher or optional

clipping deflector.

• To retum to mulching operation, install

mulcher plug into discharge opening of

mower.

Mulcher Plug

TO PREPARE BATTERY

NOTE: Your battery must be charged

before you can start your lawn mower.

• Disconnect engine battery connector

(male) from battery connector (female)

• Connect battery charger connector

(male) to battery connector (female).

• Plug battery charger into 110 volt A.C.

outlet.

• Leave battery charger connected for 24

hours before starting your engine for the

first time.

• After charging, connect engine connec-

tor (male) to battery connector (female).

Your engine has an integral alternator for

partial charging. Connect your battery

charger to charge battery as required.

IMPORTANT: The engih-e_alt-ei'fi_f6r-will

not charge a discharged battery.

At the end of the mowing season the

battery should be charged for 48 hours to

protect the battery during winter storage.

CAUTION: Always disconnect the engine

connector (male) from the battery

connector (female) to prevent accidental

starting when transporting or storing your

lawn mower after the season.

READ THIS OWNER'S MANUALAND SAFETY RULES BEFORE OPERATING YOU'_,WN

k4OWER. Compare the illustrations with your lawn mower to familiarize yourself with the

kx_ationof 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

<NOW YOUR LAWN MOWER

Ddve control

Electric start key_

Operator presencecontrol

Starter handle

Cable clip

Grass catcher

Wheel adjuster

lever

Gasoline cap

Primer

Engine oil cap w/dipstick

Housin.c

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 - must be

held down to the handle to start the

engine. Release to stop the engine.

Primer - pumps additional fuel from the

carburetor to the cylinder for use when

starting a cold engine.

Starter handle - used for starting the

engine.

Drive control bar - used to engage

power-propelled foward motion of lawn

mower.

Mulcher plug - Located at the rear

discharge opening must be removed when

converting to bagging operation.

Electric start key - used for starting the

engine.

The ()peration ofany lawn mowercan resultin

foreign objectsthrown intothe eyes, which can

resultin severe eye damage. Alwayswear

safety glasses or eye shieldswhile operating

your lawn mower or performingany adjust-

mentsor repairs. We recommend awide

visionsafety mask overthe spectacles or

standardsafetyglasses.

HOW TO USEYOUR LAWN MOWER

ENGINE SPEED

The engine speed was set at the factory for

optimum performance. Speed isnotadjust-

able.

ENGINE ZONE CONTROL

CAUTION: Federal regulationsrequirean

engine controlto be installedon this lawn

mower in order to minimize'the riskofblade

contact injury.Do notunder any circu_

attempt to defeat the function of the operator

control.The bladetums when the engine is

running.

• Your lawn mower is equipped withan

operator presence controlbar which

requiresthe operator tobe positioned

behind the lawn mOwer handle tostart and

operate the lawn mower.

TO ADJUST CUTTING HEIGHT

• Allfour wheals are adjustedby a single

lever.

• Pull adjuster levertoward wheel. To raise

mower, move lever forward to desired

position.To lower mower, move the lever

toward the rear.

LowerWheels forhigh cut

Acluster

Lever

Raise Wheels for low cut

TO OPERATE DRIVE SYSTEM

• To startforward motion, liftdrive controlbar

upto handle.

• To stop forward motion,release drive

control bar.

IMPORTANT: Always keep drive controlbar

fully engaged against handle when in use.

Drive

Operatorpresence controlbar

controlbar--

Toengage_'_ Drivecontrol

drive control desengaged

TO ATTACH GRASS CATCHER

• Liftthe rear doorofthe lawn mower and

place the grasscatcher frame hooksintothe

slotsofthe rear door.

• The grasscatcher issecured tothe lawn

mower housingwhen the reardoor is

lowered onto the grass catcher frame.

CAUTION: Do not runyour lawn mower

withoutclippingdeflectoror approved grass

catcher in place. Never attempt to operate the

lawn mower withthe rear door removed or

propped open.

Rear door

slots

Grass

handle

Catcher frame

hook

TO EMPTY GRASS CATCHER

• Liftup on grasscatcher using the frame

handle.

• Remove grasscatcher with clippingsfrom

under lawn mower handle.

• Empty d'_opingsfrom bag using both frame

handle and bag handle.

NOTE: Do not drag the bag when emptying;

itwillcause unnecessary wear.

BEFORE STARTING ENGINE__

OIL

Your lawn mower isshipped withoutoilinthe

engine.

• Be sure mower is leveland area around oil

fillis dean.

• Remove engineoilcap w/dipstickand fill to

the full lineonthe dipstick.

• Use 20 ozs. of oil. For type and grade of oil

to use, see =ENGINE" in Maintenance

sectionof this manual.

• Pour oilslowly. Do notover fill.

• Check oillevelbefore each use. Add oilif

needed. Filltofull lineon dipstick.

• To read properlevel, tightenengine oilcap

each time.

• Reinstallengine oilcap and tighten.

• Change the oilafter every 25 hoursof

operationor each season. You may need

to change the oilmore often underdusty,

dirtyconditions.

GAS

• Fill fuel tank. Use fresh, clean, regular

unleaded gasoline with a minimum of 87

octane. (Use of leaded gasoline will

increase carbon and lead oxide deposits

and reduce valve life). Do not mix,oil

with gasoline. Purchase fuel in quanti-

ties that can be used within 30 days to

assure fuel freshness.

IMPORTANT: WHEN OPERATING IN

TEMPERATURES BELOW 32°F(0°C), use

fresh, clean winter grade gasoline to help

insure good cold weather starling.

WARNING: 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.

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.

Gasolinefiller

Engineoil cap

w/dipstick j cap

TO START ENGINE

• To start a cold engine, push primer five

(5) times before trying to start. Use a

firm push. This step is not U_Jall_ -

necessary when starting an engine

which has already run for a few minutes.

• Hold operator presence control bar

down to the handle.

• Tum electric start key clockwise to crank

engine.

IMPORTANT: Do not crank engine more

than five continuous seconds between

each time you try to start. Wait 5 to 10

seconds between each attempt.

• To start engine using the auxiliary

starter handle, follow the steps above.

Exchange the use of the start key for-_

starter handle. Pull starter handle

quickly. Do not allow starter rope to

snap back.

• 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 youdo

flood engine wait a few minutes before

attempting to start and do not repeat

priming steps.

MOWING TIPS

• Under certain conditions, such as very tall

grass,it may be necessary to raisethe

heightof cutto reduce pushingeffortand to

keep fromoverloadingthe engine and

leavingclumps of grass clippings.

• For extremely heavy cutting,reduce the

width of cut by overlapping previously cut

path and mow slowly.

• When using a rear discha_ la_WTrnowerin

moist, heavy grass, dumps of cut grass

may not enter the grass catcher. Reduce

groundspeed (pushing speed) and/or run

the lawn mower overthe area a second

time.

• Ifa trailof clippingsislefton the rightside of

a rear discharge mower, mow in a clock-

wise directionwith a small overlap tocollect

the dippings on the next pass.

• Pores in clothgrass catcherscan become

filledwith dirtand dustwith use and

catchers willcollectless grass. To prevent

this, regularlyhose catcher offwithwater

and letdry before using.

• Keep top of engine around starterclearand

clean of grass clippingsand chaff. This will

help engine air flow and extend engine life.

MULCHING MOWING TIPS

IMPORTANT:Forbestperformance,keep

mowerhousingfree of built-upgrass and

trash.See =Cleaning" in Maintenance section

of this manual.

• The special mulchingblade WIUrecut the

grass cr=ppingsmany times and reduce

them in size so that as they fagonto the

lawn they will disperse intothe grass and

not be noticed. Also,the mulched grass will

biodegrade quicklyto providenutrientsfor

the lawn. Always mulch withyour highest

engine (blade) speed as this wRIprovidethe

best recuffingaction ofthe blades.

• Avoid cuttingyour lawn when it is wet. Wet

grass tends toform dumps and interferes

with the mulchingaction:-The best time to

mow your lawn is the early aftemoon. At

this time the grass has driedand the newly

cut area will notbe exposed to the direct

sun.

• For best results,adjustthe lawn mower

cuttingheight sott'_t the lawn mower cuts

offonlythe topone-third ofthe grasFblades.

Ifthe lawn is overgrownit willbe,meesSary

to raisethe height of cutto reduce pushing

effortand to keep from overloadingthe

engine and leavingclumps ofmulched

grass. For extremely heavy mulching,

reduce your widthof cutby overlapping•

previouslycutpath and mow slowly.

• Certaintypes of grass and grass conditions

may require thatan area be mulched a

second time to completelyhidethe

clippings. When doinga second cut,mow

acrossor perpendiculartothe firstcut path.

• Change yourcuttingpattem from week to

week. Mow north tosouthone weektherr-.

change to east towest the next week. This

will help prevent mating and grainingofthe

lawn.

Max,/3

. °", i 1 .

ASYOUCOMPLETE

Ir _".,'_ -It

Checkfor LooseFasteners

Clean/InspectGrassCatcher

,(IfEquipped)

v'3

Clean La_m Mower

Clean Under Drive Cover

W, {Power-Propelled Mowers)Check drive belt/pulleys

,(Power-Propelled Mowers)

R Check/Sharpen/Replace Blade

Lu_caUonChart V' V'

Clean Battery/Recharge ....

(Electric Start Mowers) _ Ik/4

RECheck EngineOilLevel

Change Engine Oil _1_1._

Clean Air Fdter

Inspect Muffler

N Clean or Replace Spark Plug

Replace Air Filter Paper Cartridge If 2

1- Change moreoftenwhenoporaHngunder aheavyloador klhlghamblemlem_ms.

2 - SeNice more oftenwhenopemlk_ In di_yordustyconddJons.

3 - Replace bladesmornoftenwhenmowingin sandysoiL

4 - Charge 48 houmat end ofseason.

GENERAL RECOMMENDATIONS

The warranty on this lawn mower does not

cover items that have been subjectedto

operator abuse or negligence. To receivefull

value from the warranty,operator must

maintain mower as instructedinthis manual.

Some adjustments willneed to be made

periodicallyto propertymaintainyour unit.

All adjustments in the Service and Adjust-

ments section ofthis manual shouldbe

checked at least once each season.

• Once a year, replace the spark plug,

replace airfilterelement and check blade for

wear. A new spark plugand clean/new air

filterelement assures proper air-fuelmixture

and helpsyour engine rail betterand last

longer.

• Followthe maintenance schedule in this

manual.

BEFORE EACH USE

• Check engine oillevel.

• Check for loosefasteners.

LUBRICATION

Keep unitwell lubricated(See "LUBRICATION

CHART").

LUBRICATION CHART

(_ Engineoil (_ Wheel

adjuster

(_)- Drive pins

__0 _Brake....

spring

bracket

(_ Rear

door

(_0 Spray lubricant

hinge

(_ Refer to Maintenance "ENGINE"

section.

IMPORTANT: Do not oilor grease plastic

wheel bearings.Viscouslubricantswill

attractdust and dirtthat will shorten the

lifeofthe selflubricatingbearings. If you

feel they mustbe lubricated,use only a

dry,powderedgraphitetype lubricant

spa ngly.

PRODUCT SPECIFICATIONS

MODEL NUMBER 917.377631

SERIAL NUMBER

DATE OF PURCHASE

HORSEPOWER: 6.75

DISPLACEMENT: 12.56 CU. IN.

GASOLINE CAPACITY/TYPE: 1.25 QUARTS

UNLEADED REGULAR

OIL TYPE (API-SF/SG/SH): SAE 30 (ABOVE 32°F)

SAE 5W,,30 (BELOW 32°F)

OIL CAPACITY: 20 OZS.

SPARK PLUG(GAP: .030") CHAMPION RN4C

VALVE CLEARANCE: INTAKE: .004 - .008

EXHAUST: .004 - .008

SOLID STATE IGNITION

AIR GAP: .0125 IN.

BLADE BOLT TORQUE: 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 space

provided above.

.AWN MOWER

Always observe safety rules when performing

any maintenance.

TIRES

• Keep tires free of gasoline,oil,or insect

controlchemicals which can harm rubber.

• Avoid stumps,stones, deep ruts,sharp

objects and other hazards that may cause

tiredamage.

BLADE CARE

Forbest results,mower blade must be kept

sharp. Replace bent or damaged blades.

TO REMOVE BLADE

• Disconnect spark plug wire from spark plug

and place wire where itcannot come in

contactwith spark plug.

• Turn lawn mower on itsside. Make sure air

filterand carburetor are up.

• Use a wood block between blade and

mower housingto preventblade from

tumingwhen removing blade bolt.

• Protectyour hands withgloves and/or wrap

blade with heavy cloth.

• Remove blade boltby turningcounter-

clockwise.

• Remove blade and attachinghardware

(bolt,lockwasher and hardened washer).

NOTE: Remove the blade adapter and check

the key inside hubof bladeadapter. The key

must be in good conditionto work properly.

Replace adapter ifdamaged.

TO REPLACE BLADE

IMPORTANT:

treated.

• Position the blade adapter on the engine

crankshaft. Be sure key=in-adapterand

crankshaft keyway are aligned.

• Positionblade on the blade adapter aligning

the two (2) holesin the bladewith the raised

lugsonthe adapter.

• Be sure the trailingedge ofblade (opposite

sharp edge) isuptoward the engine.

• Installthe bladeboltwiththe lockwasher

and hardened washer intoblade adapter

and crankshaft.

• Use blockofwood between blade and lawn

mower housingand tightenthe blade bolt,

tuming clockwise

The recommendedtightening torque is35-

40ft. Ibs.

Bladeboltisgrade_8heat

NOTE: We donotrecommendshaq_ning

blade-butifyoudo, besurethebladeis

balanced.

TO SHARPEN BLADE

Care should be taken to keep the blade

balanced. An unbalanced blade wiUeause

eventual damage to lawn mower or engine.

. The blade can be sharpened .with a fileor

on a grindingwheel. Do not attemptto

sharpen while onthe mower.

• To check blade balance, drive a nailintoa

beam or walL Leave about one inchofthe

straightnagexposed. Place center holeof

blade over the head of thenail. If blade is

balanced, itshould remain in a horizontal

position, if eitherend of thQblade moves

downward, sharpen the heavy end unblthe

blade isbalanced.

Key

Blade,

Blade

bolt

Blade Crank-

adaptor shaft

keyway

• Lock

washer Crank-

Hardened Blade

washer Trailing shaft

edge adaptor

GRASS CATCHER

• 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 itwill wear. If catcher needs

replacing, replace only with a manufac-

turer approved replacement catcher.

Give the lawn mower model number

when ordering.

DRIVE WHEELS

Check rear drive wheels each time you

mow to be sure they move freely. The

wheels not tuming freely means trash,

grass cuttings, etc., may be inside the

drive wheel and dust cover area and must

be cleaned out to free drive wheels.

If necessary to clean the drive wheels,

check both rear wheels.

• Remove hubcaps and Iocknuts.

* Remove wheels from wheel adjuster

axles.

• Remove any trash or grass cuttings from

inside the dust cover, pinion and/or drive

wheel gear teeth.

• The pinion gear must be installed with

the left gear on the left side and with the

right gear on the rightside, from an

operator's view.

• The pinion gear is stamped with an "L"

(left) or "R" (right) on the inside. If

installed incorrectly, the drive system will

not work.

• Place wheels back on adjuster axles.

• Replace Iocknuts and hubcaps.

NOTE: Pinions and drive pawls should be

cleaned and lubricated with grease

approximately every 25 hours or once a

year.

LocknutWash_^o"_

Drive pin

Dust cover

Pinion

E-dng

ENGINE _.

LUBRICATION

Use onlyhighquarrydetergentoil ratedwith

AP! service classificationSF, SG or SH.

Select the oil'sSAE viscositygrade according

to yourexpected operatingtemperature.

SAE VISCOSITY GRADES

4 I,

=IF -20" 0" 30" 32" 40" 60" 80° 100"

TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE

NOTE: Althoughmulti-viscosityoils(5W30,

10W30 etc.) improvestartingincold weather,

these multi-viscosityoilswillresultin increased

oilconsumption when used_abo-Ve32°F..

Check your engineoillevel more frequently to

avoidpossibleengine damage from running

low ono=1.

Change the oilafterevery 25 hours of

operationor at least once a year ifthe lawn

mower isnot usedfor 25 hours in one year.

Check the crankcase oillevel before starting

the engine and aftereach five(5) hours of

continuoususe. Tighten oil plug securelyeach

timeyou check the oillevel.

TOCHANGE ENGINE OIL

NOTE: Before tippinglawnmower to drain oJ,

drainfuel tank by runningengine unb'lfuel tank

isempty.

• Disconnect spark plugwirefrom spark plug

and place wire where itcannot come in

contact sparkplu

• Remove engine oilcap;lay aside on a clean

surface.

• Tip lawn mower on itsside as shown and

drainoil intoa suitablecontainer. Rock lawn

mower back and forth to remove any oil

trapped inside ofengine.

• W'_eeoff any spilledoilon lawn mower and

on side of engine.

• Fill engine with oil. RII only tothe =FULL"

line on the dipstick. DO N(_T OVER RLL

• Replace engine oil cap.

• Reconnect spark plugwire to spark plug.

Container

AIR FILTER

Your engine will not run properly and may

be damaged by using a dirty air filter.

Replace the air filter every year, more

often if you mow in very dusty, dirty

conditions. Do not wash air filter.

TO CHANGE AIR FILTER

• Remove the air filter by turning clock-

wise to the stop and pull away from

collar.

• Remove filter from inside of cover.

• Clean the inside of the cover and the

collar to remove any dirt accumulation.

• Insert new filter into cover.

• Put air filter cover and filter into collar

aligning the tab with the slot.

• Push in on cover and tum counterclock-

wise to tighten.

Coil

Clip

Tum

clockwiseto

remove

Air filter

Tab

counter-

clockwise

Air filter

tighten

cover

MUFFLER ";

Inspect and replace corrodedmuffleras it

couldcreate afirehazard and/or damage.-

SPARK PLUG

Change your spark plug each year to make

your engine start easier and run better. Set

spark pluggap at .030 inch.

CLEANING

IMPORTAN'E For best performance, keep

mower housingfree of built-upgrassand trash.

Clean undersideof mower housingafter each

use.

CAUTION: Disconnectspark plug wire from

spark plugand place wire where itcannot

come in contactwiththe spark plug.

• Turn lawn mower on itsside. Make sureair

filter and carburetorare up. Clean the

undersideofyour lawn mower by scraping

to remove build-upof grass and trash.

• Clean engine oftento keep trashfrom

accumulating.A dogged engine runshotter

and shortensengine life.

• Keep finished surfaces and wheels free of

allgasoline,oil,etc.

• We do not recommend using-a'_tdeh hose

toclean lawn mower unlessthe electrical

system,muffler,air filterand carburetorare

covered to keep water out. Water in engine

can resultin shortened engine life.

CAUTION; BEFOREPERFORMING ANY

SERVICE OR ADJUSTMENTS:

= Release €ontrolbar.

° Make surethe bladeand all moving

partshavecomp steppecL

• Disconnectsparkplugwirefrom

spark plugand place where itcannot

come incontact withplug.

LAWN MOWER

TO ADJUST cUTnNG HEIGHT

See "TOADJUSTCUTI'ING HEIGHT"inthe

Operationsectionofthis manual.

REAR DEFLECTOR ....

The rear detlector,attached between the rear

wheels of your lawn mower, isprovidedto

minimize the possibilitythat objectswillbe

thrown out the rear ofthe lawn mower intothe

operator'smowing position. Ifthe rear

deflectorbecomes damaged, itshould be

TO ADJUST HANDLE

The handle onyour lawn mower hasthree (3)

height positions- adjustto heightthat suits

you.

• Squeeze the bottom ends of lowerhandle

towards each otheruntilthe pinin handle

can be inserted intoone of the three height

adjustment holes.

High

Med.

Low

/ 3-position

Handle

adjustment

bracket

ENGINE ..

ENGINE SPEED

Yourengine speed has been factoryset.- Do

not attempt to increase enginespeed or it

may resultin personal injury. Ifyou believe

thatthe engine is runningtoo fast or too slow,

take your lawn mower to an authorized

servicecenter/departmentfor repairand

adjustmenL

CARBURETOR

Yourcarburetorhas a non-adjustablefixed

mainjet for mixturecontrol. If yourengine

doesnot operate properlydue to suspected

carburetorproblems, take your lawn mower to

an authorized service center/departmentfor

repairand adjustment.

Immediately prepare your lawn mower for

storage at the end ofthe season or ifthe unit

will notbe used for 30 days or more.

LAWN MOWER

When lawn mower is to be storedfora period

oftime, clean itthoroughly, remove all dirt,

grease, leaves, etc. Store in a clean, dry area.

• Clean entire lawn mower (See "CLEANING"

in the Maintenance section of this manual).

• Lubricate as shown in the Customer

Maintenance section of this manual.

• Be sure that all nuts, bolts,screws, and pins

are securely fastened. Inspect moving

partsfor damage, breakage and wear.

Replace if necessary.

• Touch up all rusted orchipped paint

surfaces;sand lightlybefore painting.

HANDLE

• You canfold your lawn mower handle for

storage.

• Loosenthe two (2) handle Imobson-sides of

the upper handle and allow handle tofold

downto the rear.

• Squeeze the bottomends oflower handle

toward each other untilpinsin handle clear

the brackets and pivot entirehandle

assemblyforward and allow itto reston

mower.

• When settingup your handlefrom the

storageposition,the lowerhandle will

requiremanually lockingintothe mowing

position.

IMPORTANT: When folding the handlefor

storageor transportationbe suretofoldthe

handle as shown or you may damage the

controlcables.

Operator presence

control bar

Upper handle

Uft up

Uftup

Mowing

Lower position

handle

ENGINE

FUELSYSTEM

IMPORTANT: Itisimportantto preventgum

depositsfrom forming in essentialfuel system

partssuchas carburetor,fuel filter, fuel hose,

or tank duringstorage.Also, experience

intimatesthat alcoholblended fuels (called

gasoholor using ethanolor methanol) can

attractmoisturewhich leads to separationand

formaUon ofacids duringstorage. Acidicgas

can damage thefuel system of an engine

while in storage.

• Drain the fuel tank.

• Startthe engine and let it run untilthe fuel

linesand carburetor are empty.

• Never use engine or carburetor cleaner

productsin the fuel tank or permanent

damage may occur.

• Use fresh fuel nextseason.

NOTE: Fuel stabilizerisan acceptable

altemative in minimizingthe formation offuel

gum depositsduringstorage. Add stabilizerto

gasolineinfuel tank orstorage container.

Alwaysfollow the mk ratiofound on stabilizer

container. Run engineat least 10 minutes

after addingstabilizerto allowthe stabir_.erto

reach the carburetor. Do notdrain the gas

tank and carburetorifusing fuel stabilizer.

ENGINE OIL

Drain oil(withenginewaml) andreplace

clean engine oil. (See "ENGINE" inlhe

Maintenance sectionof thisl_"--tahU.i_._

CYMNDER

• Removesparkplug.

• Pour one ounce (29 mi) ofoilthrough spark

plug hole intocylinder.

• Pull starterhandleslowlya few times to

dL_tn]_Jteoil.

• Replace with new spark plug.

BATTERY

Disconnect the battery from the engine

connector and charge battery 48 hours.

OTHER

• Do not store gasolinefrom one season to-----

another.

• Replaceyourgasolinecan ifyourcan starts

torust Rustand/ordirtinyourgasolinewiU

cause problems.

• Ifpossible,storeyourunitindoorsand cover

ittogiveprotectionfromdustand dirL

• Cover yourunitwitha suitableprotective

coverthatdoes not retainmoisture.Do not

use plastic.Plasticcannotbreathewhich

allowscondensationtoformand wiUcause

your unit to rust.

IMPORTANT: Never covermower while

engine and exhaust areas are stillwarm.

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.

PROBLEM

TROUBLE SHOOTING

CAUSE

Will not start

Loss of power

Poor cut - unever

Excessive vibra-

tion

Starter rope hard

to pull

• Dirty air filter.

• Out of fuel.

• Stale fuel.

• Water in fuel.

• Spark plug wire is dis-.

connected

• Bad spark plug.

• Loose blade or broken

blade adapter.

• Control bar in released

position

• Control bar defective

• Weak battery

• Disconnected battery

connector.

• Rear of lawn mower

housing/blade dragging in

heavy grass.

• Cutting too much grass.

• Dirty air filter.

• Buildup of grass, leaves

and trash under mower.

• Too much oil in engine.

• Walking speed too fast.

• Wom, bent or loose blade.

• Wheel heights uneven.

• Buildup of grass, leaves,

and trash under mower.

• Wom, bent or loose blade.

• Bent engine crankshaft.

• Engine flywheel brake is

on when control bar is

released.

• Bent engine crankshaft

• Blade adapter broken.

• Blade dragging in grass.

CORRECTION

• Clean/replaceair filter.

• Fill fuel tank.

• Drain tank and refill with fresh

clean fuel.

• Drain fuel tank and carburetor

and refill tank with fresh gaso-

line.

• Connect wire to plug.

• Replace spark plug.

• "13ghten'bladeboltor replace

blade adaPter.

• Depress'i:ontrolbar to handle.

• Replace control bar.

• Charge battery.

• Connect battery to engine.

• Set in =Higher Cut" position.

• Clean/replace air filter.

• Clean underside of mower

housing.

,, Check oil level.

• Cut at slower walking speed.

• Replace blade. Tighten blade

bolt.

• Set all wheels at same height.

• Clean underside of mower

housing.

• Replace blade. Tighten blade

bolt.

• Contact an authorized service

center/department.

• Depress control bar to upper

handle before pulling starter

rope.

• Contact an authorized service

center/department.

• Replace blade adapter.

• Move lawn mower to cut grass

or to hard surface to start _

engine.

16 _

TROUBLE SHOOTING

;)ROBLEM CAUSE CORRECTION

Loss of drive

(Self-Propelled

Mowing)

Grass catcher

not filling (If so

equipped)

Hard to push

• Drive wheels not turning

with drive control engaged.

• Belt not driving.

• Cutting height too low.

• Lift on blade worn off.

• Catcher not venting air.

• Grass is too high or wheel

height is too low.

• Rear of lawn mower

housing/blade dragging

in grass.

• Grass catcher too full.

• Handle height position not.

right for you.

• Adjust or replace drive control

cable, if broken.

• Put belt on pulleys or replace

belts if broken.

• Raise cutting height.

• Replace blade.

• Clean grass catcher.

• Raise cutting height.

• Raise rear of lawn mower

housing one (1)

setting higher.

• Empty grass catcher.

• Adjust handle height to suit.

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ROTARY LAWN MOWER - - MODEL NO. 917.377631 .

BATTERY

KEY

NO.

PART

NO.

161334

750909

17411312

86353

111549X

DESCRIPTION

BatteryBox

Battery

Hex WasherHead Screw

13x.750

ConnectorMountingClip

BatteryCharger

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CRAFTSMAN 4-CYCLE ENGINE

MODEL NUMBER 143.986718

9O0

157

153_

_223 185

_370A

224 207

3OO

292

29O

238 250

_RAFTSMAN 4-CYCLE ENGINE MODEL NUMBER 143.986718

KEY PART

NO. NO. DESCRIPTION

KEY PART

NO. NO. DESCRIPTIOI_': _

1 36835A

2 26727

6 33734

7 36557

12 32447

12A 36558

12B

36694

28277

30589

34839A

31335

651018

36281

32600

35801

35544A

35545A

35546

35541

35542

35543

35547A

35548A

35549

20381

32875A

32610A

35616

37011

29914

35261

36995

72 30572

73 28833

75 27897

80 30574A

81 30590A

82 30591

83 30588A

86 650488

89 611004

90 611044

92 650815

93 650816

100 34443B

101 610118

103 651007

110 37047

110A 36953

110B 36954

119 36738

120 36721

125 36471

36472

126 29314B

29315C

130 650912

130A650999

135 34645

150 31672

151 31673

153 36649

154 650913

Cylinder (Incl. 2 & 20) 155 35624A

Dowel Pin 157 650914

Breather Element 158 36629

Breather Ass'y. (Incl. 6 & 12A) 159 35626

Breather Tube 160 35627

Breather Cover & Tube 161 30063

(Incl.12B) 178 29752

Breather Tube Elbow 182 30088A

Washer 184 26756

Governor Rod (Incl. 14) 185 36579

Governor Lever 186 32653

Governor Lever Clamp 187 36580

Screw, Torx T-15, 8-32 x 19/64" 189 650831

Extension Spdng 191 36559

Oil Seal 195 610973

Crankshaft 196 35035

Piston, Pin &'Ring Set (Std.) 207 34336

Piston, Pin & Ring Set (.010"OS) 216 33086

Piston, Pin & Ring Set (.020"OS) 223 651044

Piston & Pin Ass'y. (Std.) 223A 651043

Piston & Pin Ass'y. (.010" OS) 224 36581

(Incl. 43) 238 650932

Piston & Pin Ass'y. (.020" OS) 239 34338

(Incl. 43) 241 36919

Ring Set (Std.) 245 36905

Ring Set (.010" OS) 250 36920

Ring Set (.020" OS) 260 37180

Piston Pin Retaining Ring 261 30063

Connecting Rod Ass'y. (Incl. 46) 262 650831

Connecting Rod Bolt 263A 37184

Valve Lifter 275 36950

Camshaft (MCR) 276 36949

Oil Pump Ass'y. 277 651039

Mounting Flange Gasket 285 35000A

Mounting Flange 287 650926

(Incl. 72 thru 83) 290 29774

Oil Drain Plug (Incl. 73) 292 26460

Drain Plug Gasket 298 28763

Oil Seal 300 36916

Governor Shaft 301 36246

Washer 305 35647

Governor Gear Ass'y. (Incl. 81) 306 36996

Governor Spool 307 35499

Screw, 1/4-20 x 1-1/4" 309 650562

Flywheel Key 310 35648

Flywheel 313 34080

Belleville Washer 314 650767

Flywheel Nut 315 36952

Solid State Ignition 322 35013

Spark Plug Cover 322A 610885

Screw, Ton(T-15,10-24 x 15/16" 325 35249

Ground Wire 325A 37152

Ground Wire 325B 29443

D.C. Starter Wire 341A 36578

Cylinder Head Gasket 347 651038

Cylinder Head 370A 36261

Exhaust Valve (Std.) (Incl. 151) 370C 37199

Exhaust Valve (1/32" OS) 380 640160

(Incl. 151) 390 590739

Intake Valve (Std.) (Incl. 151) 395 35709

Intake Valve (1/32" OS) 400 36806B

(Incl. 151) 900

Screw, 5/16-18 x 1-1/2" 900

Screw, 5/16-18 x 2-41/64" from 71-999

Resistor Spark Plug (RN4C)

Valve Spdng

Valve Spring Cap

Push Rod Guide

Rocker Arm Stud

Rocker Arm

Lock Nut

Push Rod

Rocker Arm Cover Gasket

Rocker Arm Housing

Screw, Torx T-30, 1/4-20 x 1/2"

Nut & Lock Washer, 114-28

Screw, 1/4-28 x 1"

Carburetor Gasket

Intake Pipe

Governor Link

Spacer

Screw, 1/4-20 x 1/2"

S.E, Brake Ass'y. (Incl. 195)

Terminal

Power Restart Switch ....

Thlottie Unk

R.P.M. Adjusting Lever

Screw, 1/4-20 x 2-25/32"

Screw, 1/4-20 x 1-31/64"

Intake Pipe Gasket

Screw, 10-32 x 49/64"

Air Cleaner Gasket

Air Cleaner Collar

Air Cleaner Filter

Air Cleaner Cover

Blower Housing

Screw, Torx T-30, 1/4-20 x 1/2"

Screw, 1/4-20 x 1/2"

Starter Grill

Muffler (Incl. 276 & 277)

Locking Plate

Screw, 1/4-20 x 2-47/64"

Starter Cup

Screw, 8-32 x 21/64"

Fuel Line

Fuel Une Clamp

Screw, 10-32 x 35/64"

Fuel Tank (Incl. 292 & 301)

Fuel Cap

Oil Fill Tube

_O'-Ring

"O"-Ring

Screw, 10-32 x 1/2"

Dipstick

Spacer ....

Screw, 8-32 x 27/64"

Alternator Coil

Connector Body

Spring Clip

Blower Housing Support Bracket

Screw, 10-32 x 27132"

Lubrication Decal

Pdmer Decal

Carburetor (IncL 184)

Rewind Starter

Electric Starter Motor (12 Volt)

Gasket Set (Incl. Items Marked *)

Replacement Engine NONE

Replacement S/B 750834, order

RPM High 3000 to 3300

NOTE: This engine could have been_uilt

with 590702 starter.

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Craftsman 37763 User manual

Brand: Craftsman

Model: 37763

Category: Lawnmowers

Type: User manual

This manual is also suitable for

917.377631

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Craftsman 37763 User manual

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