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3. Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
4 Reassemble air cleaner.
Clamp Screw_
\Swivel
Choke Clo_
Casina _ _ Choke
Clamp__ _ Lever
TO ADJUST CARBURETOR
The carburetor has been preset at the
factoryand adjustment should not be
necessary. However, minor adjustment
may be requiredto compensate for
differencesin fuel, temperature, altitude
or load.
If the carburetor does need adjustment,
proceed as follows:
In general, turning the mixture screw In
(clockwise) decreases the supply of fuel
to the engine giving a leaner fueVair
mixture. Turning the mixture screw out
(counterclockwise) increases the supply
of fuel to the engine givinga dcher fuel/
air mixture.
IMPORTANT: Damage to the needles
and the seats in carburetor may result if
screw is tamed in too tight.
PRELIMINARY SE'R'ING -
1. Be sureyou have a clean air filter,
and the throttle control cable and
choke are adjusted properly (see
above).
2. With engine off turn idle mixture screw
in (clockwise) closing it finger tight
and then turn out (counterclockwise)
1-1/4 to 1-1/2 turns.
FINAL SE'I-I'ING -
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.
28
2. With throttlecontrol lever in slow
position, hold throttle lever against
idle speed screw and adjust idle
speed screw to obtain 1200 to 1400
RPM.
3. While still holdingthrottle lever
against idle speed screw, turn idle
mixture screw In (clockwise) until
engine begins to die and then turn out
(counterclockwise) until engine runs
rough. Turn screw to a point midway
between those two positions.
4. Continue to hold throttlelever against
idle speed screw and adjust idle
speed screw to obtain 900 to 1200
RPM. Release throttlelever.
ACCELERATION TEST -
5. Move throttle control lever from slowto
fast position. If engine hesitates or
dies, turn idle mixture screw out
(counterclockwise) 1/8 turn. Repeat
test and continue to adjust, if neces-
sary, 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
setting can be dangerous. If you thinkthe
engine-governed high speed needs
adjusting, contact a Sears or other
qualified service center, which has proper
equipment and experience to make any
necessary adjustments.
Screw
Idle Mixture
Screw
Throttle
Lever
IdleSpeed
Tehr''e_/_ __] die Mixture
Screw
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