ERVICE AND ADJUSTMENTS
i,
ENGINE
TO ADJUST THROTTLE CONTROL CABLE
(See Fig, 38 & 39)
The throttle control has been preset at the factory and
adjustmentshould not be necessary. Checkadjustment as
described below before loosening cable° If adjustment is
necessary, proceed as follows:
° With engine not running, move throttlecontrol leverto
fast 0 position.
o Checkthat speed controllever isagainststopscrew. If
it is not, loosen casing clamp screw and pull throttle
cable untillever isagainst screw° Tightenclampscrew
securely.
TO ADJUST CARBURETOR (See Fig. 40)
The carburetor has been present at the factory and adjust-
rnentshould notbe necessary. However,minoradjustment
may be required to compensate for differences in fuel,
temperature, altitude or load. If the carburetor does not
need adjustment, proceed as follows:
In general, turning the adjusting needles in (clockwise)
decreases the supply of fuel to the engine giving a ieaner
fuel/air mixture. Turning the adjusting needles out (coun-
terclockwise) increases the supply of fuel to the engine
givinga richer fue!/air mixture°
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF SCREW tS
TURNED IN TOO TIGHT°
PRELIMINARY SETTING -
o 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 (clock-
wise) closing it finger tight and then turn out (counter-
clockwise) 1-1/4 turns,,
° Turn main fuel adjusting needle in (clockwise) closing
finger tight and then turn out (counterclockwise) 1turn,,
FINAL SETTING -
° Start engine and allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position,,
. With throttle control lever in fast 0 position, turn main
fuel adjusting needlein (clockwise) untilengine begins
to die then turn out (counterclockwise) until engine
runs rough. Turn needle to a point midway between
those two positions.
° Idle sneed settina- With throttle control lever in slow 0
position, engine'should idle at 1400 RPM if engine
idles too slow or fast, turn idle speed adjusting screw in
or out until correct idle is attained°
° idle fuel needle setting - With throttle control lever in
slow () position, turn idle fuel' adjusting needle in
(clockwise) until engine begins to die and then tfamout
(counterclockwise) until engine runsrough. Turn needle
to a point midway between those two positions.
° Recheck idle speed. Readjust if necessary.
ACCELERATION TEST -
= Move throttle control lever from _low 0 to fast 0
position, If engine hesitates or dies,_.turn Idle mixture
screw out (counterclockwise) 1/8 turn, Repeat test and
continue to adjust, if necessary, until:engine acceler-
ates 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° IFYOU THINKTHE ENGINE-GOVERNED
HiGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS..
CASING STOP SCREW SPEED CONTROL
LEVER
THROTTLE
CONTROL
CABLE
FIG. 38
STOP
SCREW
SPEED
CONTROL
LEVER
FIG. 39
.........
o _ _ ADJUSTING
....
_ ADJUSTING
NEEDLE
25 FIG. 40
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