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SERVICE AND ADJUSTMENTS
ENGINE
TO ADJUST THRO'I-I'LE
CONTROL
CABLE
(See Fig. 30)
The throttle control has been preset at the factory and
adjustment should not be necessary. Check adjustment as
described below before loosening cable.
If adjustment is
necessary, precede as follows:
With engine not running, move throttle control lever
from "SLOW" to "CHOKE" position. Slowly move lever
from "CHOKE" to "FAST" position.
Check to see if hole in throttle lever and hole in speed
control bracket are aligned.
If holes are not aligned, loosen cable clamp screw and
align the holes by inserting a pencil or a 1/4" drill bit
through both holes.
Pull throttle cable up to remove slack and tighten cable
clamp screw. Remove alignment pencil or drill bit.
TO ADJUST CARBURETOR
(See Fig. 31)
The carburetor has been preset at the factory and adjust-
ment should not be neces,_iary.
However, minor adjust-
ment may be required to corn pensate for differences in fuel,
temperature, altitude or load. Ifthe carburetor does need
adjustment, proceed as follows:
In general, turning the adjusting needles in (clockwise)
decreases the suppl=y of fuel to the engine giving a leaner
fuel/air
mixture.
Turning
the ad usting
needles
out
(countercockwise)
ncreases
the supp y of fuel to the
engine giving a richer fuel/air mixture.
IMPORTANT;
DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR
MAY RESULT IF NEEDLE IS
TURNED IN TOO TIGHT.
PRELIMINARY
SETTING -
Be sure you have a clean air filter and the throttle
control cable is adjusted properly (see above).
With engine
off turn
idle fuel adjusting
needle in
(clockwise)
closing it finger tight and then turn out
(counterclockwise)
1 turn.
FINAL SETTING -
Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in "NEUTRAL"
position.
Idle seeed settina - With throttle control lever in"SLOW"
position, engine should idle at 1625 RPM.
If engine
idles too slow or fast, turn idle speed adjusting screw in
or out until correct idle is attained.
Idle fuel needle settina - With throttle control lever in
"SLOW" position, turn idle fuel adjusting needle in
(clockwise) until engine begins to die and then turn out
(counterclockwise) approximately 1/8 to 1/4 turn to
obtain best low speed performance.
Recheck idle speed. Readjust if necessary.
ACCELERATION
TEST -
Move throttle control lever from "SLOW" to "PAST"
position.
If engine hesitates
or dies, turn idle fuel
adjusting needle out (counterclockwise)
1/8 turn. Re-
peat 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 ENGI NE ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
CAN
BE
DANGEROUS.
IF YOU THINK THE ENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST
SEARS
SERVICE
CENTER,
WHICH
HAS
PROPER
EQUIPMENTAND
EXPERIENCETO
MAKE ANY
NECESSARY
ADJUSTMENTS.
CABLE
CLAMP
SPEED CONTROL
BRACKET
FIG. 30
IDLE SPEED
ADJUS_NO
----... _.
/
IDLE FUEL
ADJUSTING
NEEDLE
FIG. 31
24
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