To Adjust Carburetor - Craftsman 536.886350 Owner's Manual

o Alignthe hole in the auger with the hole
in the auger shaft. Install the new shear
bolt and shear bolt spacer provided°
• Reconnect the spark plug wire.
TO ADJUST CARBURETOR
The carburetor (see first figure below and
figure in Storage on page 24) has been pre,
set at the factory and readjustment should
not be necessary. However, if the carbure-
tor does need to be adjusted, proceed as
follows:
,Carburetor
Adjusting Screw
(Close finger light only)
igh Speed Adjusting Screw
(Close finger tightonly)
Close the high speed adjusting screw by
hand.
• Do not over-tighten,
° Then open it 1-1/4 to 1-1/2 turns.
• Close the idle adjusting screw by hand.
Do not over-tighteno
° Then open it 1-1/4 to 1-1/2 turns.
• Start the engine and let it warm up,
• Set the throttle control to '_ (FAST), Ad-
just the high speed adjusting screw In un-
til the engine speed or sound alters_ Ad-
just the screw out until the engine speed
sound alters, Note the difference between
the two limits and set the screw in the
middle of the range.
° Let the engine run undisturbed for 30
seconds after each setting to allow the
engine to react to the previous adjust-
ment,
• 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 lim-
its and set the screw in the middle of the
range,
• If the engine tends to stall under load or
does not accelerate from low speed to
high speed properly, adjust the high
speed screw out in 1/8 turn increments
until the problem is resolved. Let the en.
gine run for 30 seconds between settings.
IMPORTANT: Never tamper with the en.
gine governor, which is factory set for
proper engine speed° Overspeeding the
engine above the factory high speed set-
ting can be dangerous, if you think the en-
gine-governed high speed needs adjusting,
contact your nearest Sears Service Center,
which has the proper equipment and experi-
ence 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 pIug. Follow the instructions be-
low.
Replace the spark plug if the electrodes are
pitted or burned or if the porcelain is
cracked,
TO ADJUST:
Clean the spark plug by carefully scraping
the electrodes (do not sand blast or use a
wire brush:),
Be sure the spark plug is clean and free
of foreign material, Check the electrodes
gap (see figure below) with a wire feeler
gauge and reset the gap to .030 inch if
necessary,
TO REPLACE:
• If you need a new spark plug, use only
the proper replacement spark plug (see
page 15),
• Set the gap to .030,
, Before installing the spark plug, coat its
thre_.ds lightly with oil or grease to insure
easy removal,
, Tighten the plug firmly into the engine°
• If a torque wrench is available, torque the
plug to 18 to 23 fL - lbs,
23