To Adjust Carburetor; To Adjust Or Replace The Spark Plug - Craftsman 536.885910 Owner's Manual

TO ADJUST CARBURETOR ....
The carburetor(See Fig.40 and Rg. 42) hasbeen pre-set
_t the factoryand readjustmentshould notbe necessary.
_lowever, if the carburetor does need to be adjusted,
proceed as follows:
• Close the high speed adjusting screw by hand.
• Do not overtighten. ._
q, Then open it 1-114to 1-1t2 turns.
• Close the idle adjusting screw by hand. Do not
! overtighten.
q Then open it 1-1!4 to 1-1/2 turns.
_' .Start:theengineandletitwarmup. •
• Set the throttle= control to RUN. Adjust the high
speed =adjustingscrew in untilthe engine speed or
_i ' sound alters. Adjustthe screw out untilthe engine
speed sound alters. Note the difference between
• _ the two limitsand set the screw in the middleof the
_::. range.
e .Setthe_thmttle 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
_- ! andset the screw in the middle of the range,
L • '
e- If the,engine tends to stall under load or not accel-
" erate from low speed to high speed properly,adjust
the highspeed screwout in 118turnincrementsuntil
:. :the problem is resolved.
€
Let-the engine run undisturbed for 30 seconds
between each settingto allow the engineto react to
the previousadjustments.
I DIPORTANT: NEVER TAMPER WITH THE ENGINE
' :: " GOVERNOR, WHICH IS FACTORY
SET FOR PROPER ENGINE SPEED.
OVERSP.EEDING THE ENGINE
?
L ABOVE THE FACTORY HIGH SPEED
"_ .L SETTING CAN BE DANGEROUS.
IF= YOU THINK THE ENGINE - "
GOVERNED HIGH SPEED NEEDS
ADJUSTING, CONTACT YOUR
NEAREST SEARS SERVICE CENTER,
L WHICH HAS THE PROPER
.... EQUIPMENT AND EXPERIENCE TO
L .. MAKE ANY NECESSARY
ADJUSTMENTS.
TO ADJUST OR REPLACE
THE SPARK PLUG
Ifyou have difficulty startingyoursnowthrower,you may
need to adjust or replace the spark plug. Follow the
instructionsbelow.
Replace the spark plug ifelectrodes are pittedor burned
or it the porcelain is cracked,
RG. 40
TO ADJUST: .......
• Clean :the spark plug by carefully scraping elec-
..... trodes (do not sand blast or use awi m brush).
• Be sure the spark plug is clean and free of foreign
material.Check electrodesgap (See Fig. 41) with a
wire feeler gauge and resetthe gap tO .030 inch if
necessary.
,11,,,, ii
FIG. 41
i
TO REPLACE:
If you need a new spark p!ug, Useonly the proper
replacementspark plug (See page 4.), .
• Set the gap to .030. :-:: :_
• ' Beforein_taliing the spark plus, coat.its threads
lightlyw_h graphitegrease to insureeasy removal.
o =.
• Tighten the plug firmly into the engine.
• If atorque wrench is available,torque the plugto 18
to 23 ft - Ibs.