To Adjust Carburetor; Preliminary Setting; Final Setting; Acceleration Test - Craftsman 917.276011 Owner's Manual

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TO ADJUST CARBURETOR
The carburetor has been present at the
factory and adjustment should not be nec-
essary. However, minor adjustment may
be required to compensate for differences
in fuel, temperature, altitude or load. If
the carburetor does need adjustment,
proceed as follows:
In general, turning the adjusting needles
in (clockwise) decreases the supply of
fuel to the engine giving a leaner fuel/air
mixture. Turning the adjusting needles out
(counterclockwise) increases the supply
of fuel to the engine giving a richer fuel/air
mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is turned in too tight.
PRELIMINARY SETTING -
1. Be sure you have a clean air fil-
ter, and the throttle control cable is
adjusted properly (see "TO ADJUST
THROTTLE CONTROL CABLE" in the
Service and Adjustments section of
this manual).
2. With engine off turn idle fuel adjust-
ing needle in (clockwise) closing it
finger tight and then turn out (counter-
clockwise) 1 turn.
FINAL SETTING -
1. Start engine and allow to warm for
five minutes. Make final adjustments
with engine running and shift/motion
control lever in neutral (N) position.
NOTE: The high idle is set at the factory
and cannot be adjusted.
2. Idle speed setting - With throttle
control lever in slow position, engine
should idle at 1200 RPM If engine
idles too slow or fast, turn idle speed
adjusting screw in or out until correct
idle is attained.
3. Idle fuel needle setting - With throttle
control lever in slow position, turn idle
fuel adjusting needle in (clockwise)
until engine speed decreases and then
turn out (counterclockwise) approxi-
mately 3/4 turn to obtain the best low
speed performance.
4. Recheck idle speed. Readjust if neces-
sary.
ACCELERATION TEST -
5. Move throttle control lever from slow
to fast position. If engine hesitates or
dies, turn idle fuel adjusting needle out
(counterclockwise) 1/8 turn. Repeat test
and continue to adjust, if necessary,
until engine accelerates smoothly.
High speed stop is factory adjusted. Do not
adjust-damage may result.
IMPORTANT: Never tamper with the
engine 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
engine-governed high speed needs adjust-
ing, contact Sears or other qualified service
center, which has proper equipment and
experience to make any necessary adjust-
ments.
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