Craftsman 536.88502 owner manual To Adjust Carburetor, To Adjust or Replace Spark Plug, FIGo40

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SERVICE AND ADJUSTMENTS

TO ADJUST CARBURETOR

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The carburetor (See Fig. 40 and Fig. 42) has been pre-set atthe factory and readjustment should not be necessary. However, if the carburetor does need to be adjusted, proceed as follows:

o Close the high speed adjusting screw by hand

Do not overtighten.

®

Then ope n it 141/4 to t-1/2 turns

. ....

eClose the idle adjusting screw by hand. Do not overtighten

eThen open it 1-1/4 to t-1/2 turns.

Start the engine and let it warm up.

®Set the throttle control to FAST. Adjust the high speed adjusting screw in until the engine speed or sound alters Adjust the screw out until the engine

speed sound altersr Note the difference between the two limits and set the screw in the middle of the

range.

®Set the throttle control to SLOW Adjust the idle adjusting screw in until the engine speed drops, then adjust the screw out until the engine speed drops. Note the difference between the two limits and set the screw in the middle of the range.

®If the engine tends to stall under load or not accel- erate from low speed to high speed properly, adjust the high speed screw out in 1/8 turn increments until the problem is resolved

eLet the engine run undisturbed for 30 seconds between each setting to allow the engine to react to the previous adjustmenls

CARBURETOR

IDLE ADJUSTING SCREW

(Close finger tight only)

HIGH SPEED ADJUSTING

SCREW

(C!osefingertighlonly)

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FIGo40

TO ADJUST:

o

Clean the spark plug by carefully scraping elec- trodes (do not sand blast or use a wire brush).

O

Be sure the spark plug is clean and free of foreign matedal. Check electrodes gap (See Fig. 41) with a wire feeler gauge and reset the gap to 030 inch if necessary°

,030 GAP

IMPORTANT: NEVER TAMPER WITH THE ENGINE GOVERNOR, WHlCH IS FACTORY SET FOR PROPER ENGINE SPEED OVERSPEEDtNG THE ENGINE ABOVE THE FACTORY HIGH SPEED SETTING CAN BE DANGEROUS.

IF YOU THINK THE ENGINE - GOVERNED HiGH SPEED NEEDS ADJUSTING, CONTACT YOUR NEAREST SEARS SERVICE CENTER, WHICH HAS THE PROPER EQUfPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

TO ADJUST OR REPLACE

THE SPARK PLUG

if you have difficulty starting your snow thrower, you may need to adjust or replace the spark plug Follow the instructions below

Replace the spark plug if electrodes are pitted or burned or if the porcelain is cracked

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FIG. 41

TO REPLACE:

eIf you need a new spark plug, use only the proper replacement spark plug (See page 4 )

®Set the gap to .030

Before installing the spark plug, coat its threads lightly with graphite grease to insure easy removal.

oTighten the plug firmly into the engine

®If a torque wrench is available, torque the plug to 18 to 23 ft - Ibs.

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Contents Owners Manual Before USE Fuel SafetyREPA1RtADJUSTMENTS Safety Safety RulesDisplacement Horse PowerJSC Spark PlugIndex Table of ContentsL,lal l lJl l,l!i Contents of Shipping Carton Tools Required for AssemblyASS LY HOW to SET UP Your Snow ThrowerTo Remove Snow Thrower To SET the Skid HeightTo CHECK/ADJUST Control Cables To iNSTALL Upper Handle and Crank AssemblyTo Install the Shifter Lever Knob AssemblyTo Install Headlight Sembly INCORRECTt.Y and Snow could be DIS Chute FlangeThrower OperationTo .,ONTROL Snow Discharge HOW to USE Your Snow ThrowerTo Throw Snow Before Starting the Engine To USE Weight Transfer SystemFill GAS OFFTo Stop Engine OperationWarm Start Grounded Receptacle FirstFrozen Recoil Starter To Stop EngineDoors or in ENCLOSED, Poorly Ventilated AREAS. Engine EX Choke ControlSnow Throwing Tips OperatioMove Throttle Lever to Stop POSI- Tion General Recommendations TenanceSnow Thrower After First USESpark Plug EngineDipstick To Adjust Skids Height AdjustmentsTo Adjust Scraper BAR To Adjust Chute Crank AssemblyAdjust Service ANTo Adjust Belts PulleyAuger Drive Belt To Replace BeltsAdjust TS ServiceLoosenbo Trackconnectingrod Frictionwheel Discdriveplate Track Drive BeltTo Replace Friction Wheel Service and AdjustmentsTo Replace Auger Shear To Adjust TrackTo Adjust or Replace Spark Plug To Adjust CarburetorTo Adjust FIGo40Snow Thrower Storage Engine StorageOther EngineLubrication Chart ServiceSchedule Correction Trouble CausePage 73 3 1 3 Craftsman 32 TRAC-PLUS Snow ThrowerRER Craftsman 32 TRAC-PLUS SnowNO. Part NO, Part Name 76 83 85 Craftsman 32 TRAC-PLUS Snow ThrowerNO. Part no REFoPart Name Track Assembly Repair Parts 71037 Idler Wheel132 TRAC-PLUS Snow CraftsmanBearing REF.IRing Quad 59O628 Rewind Starter NOoFtsmah =CY=E Engin CRAFTSMAN4-CYCLEEHGINE 396 3337740O CarburetorPage Give the Following Information Product Snow Thrower When Ordering Repair PARTS, AlwaysModel Number Engine Model Number Part Number Part Description