SE CE A ADJUST TS
TO ADJUST CARBURETOR
The carburetor(See Fig. 37 and Rg,39)
eClose the high speed adjusting screw by hand.,
®Do nol overtighten.
e Then open it
®Close the idle adjusting screw by hand,,Do not overtighten,
eThen open it
®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.
23
