Sears 536.884821 Se Ce A Adjust Ts, To Adjust Carburetor, To Adjust Or Replace The Spark Plug

SE CE A ADJUST TS

TO ADJUST CARBURETOR

The carburetor(See Fig. 37 and Rg,39) hasbeenpre-set atthe factoryand readjustmentshouldnot benecessary. However, if the carburetordoes need to be adjusted, proceed as follows:

eClose the high speed adjusting screw by hand.,

®Do nol overtighten.

e Then open it t-1/4 to 1-1t2 turns,,

®Close the idle adjusting screw by hand,,Do not overtighten,

eThen open it 1-1/4to tdt2tums,,

®Start the engine and le!it warmupo

eSet the throttle controlto RUN,, Adjust the high speed adjustingscrew in until the enginespeed or sound aiters_ Adjust the screw out until the engine speed sound alters. Note the difference between the two limits and set the screw in the middle ol the range,,

eSet 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.

eif 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 adjustments,

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 YOUR

NEARESTSEARSSERVICECENTER,

WHICH HAS THE PROPER

EQUIPMENT AND EXPERIENCE TO

MAKE ANY NECESSARY

ADJUSTMENT&

TO ADJUST OR REPLACE

THE SPARK PLUG

Ifyou have difficulty startingyoursnowthrower,you may need to adjust or replace the spark plug. Follow the i_structions below,,

Replacethe spark plug if electrodesare pittedor burned or it the porcelain is cracked.

IDLE ADJUSTING SCREW" (Close finger tight o_tly)

HIGH SPEED ADJUSTING

SCREW

BOWL DRAIN (Close finger light only)

FIG. 37

TO ADJUST:

oClean the spark plug by carefully scrapingelec- trodes(do not sand blast or use a wire brush).

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

. : ,,,i ,11,,, I i i

FIG. 38

TO REPLACE:

If you need a new spark plug, use only the proper replacementspark plug (See page 38),,

•Set the gap to .030,

®Before installingthe spark plug, coat its threads lightly withgraphitegrease to insure easy removal

eTightenthe plug firmlyinto the engine.

etf a torquewrenchisavailable,torquetheplugtot 8 to 23 ft - lbs.

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