TO ADJUST CARBURETOR
The carburetor(See Fig.37andRg,39) hasbeenpre-set
atthefactoryandreadjustmentshouldnot benecessary.
However, if the carburetordoes need to be adjusted,
proceed as follows:
e Close the high speed adjusting screw by hand.,
® Do nol overtighten.
e Then open it t-1/4 to 1-1t2turns,,
® Close the idle adjusting screw by hand,,Do not
overtighten,
e Then open it 1-1/4to tdt2tums,,
® Startthe engineand le!it warmupo
e Set the throttle controlto RUN,,Adjust the high
speed adjustingscrewin untilthe enginespeed or
SE CE A ADJUST TS
IDLE ADJUSTING SCREW"
(Close finger tight o_tly)
HIGH SPEED ADJUSTING
SCREW
BOWL DRAIN (Close finger light only)
FIG. 37
TO ADJUST:
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,,
e 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.
e 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 in1/8 turn increments until
the problem is resolved
e Let 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
o
@
Clean the spark plug by carefullyscrapingelec-
trodes(do not sand blast or usea wirebrush).
Be sure the spark plug is clean and free of foreign
material Check electrodes gap (See Fig. 41)with a
wire feelergauge and reset the gap to .030 inch if
necessary°
. : ,,,i ,11,,, I i i
FIG.38
SETTING CAN BEDANGEROUS.
IF YOU THINK THE ENGINE -
GOVERNED HIGHSPEED NEEDS
ADJUSTING, CONTACT YOUR
NEARESTSEARSSERVICECENTER,
WHICH HAS THE PROPER
EQUIPMENT AND EXPERIENCE TO
MAKE ANY NECESSARY
ADJUSTMENT&
TO ADJUST OR REPLACE
THE SPARK PLUG
Ifyouhave difficulty startingyoursnowthrower,you may
need to adjustor replace the spark plug.Followthe
i_structions below,,
Replacethespark plug if electrodesare pittedorburned
orit the porcelain is cracked.
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
lightlywithgraphitegreasetoinsure easyremoval
e Tightenthe plug firmlyinto the engine.
e tfatorquewrenchisavailable,torquetheplugtot 8
to 23 ft- lbs.
23
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