SERVICE AND ADJUSTMENTS
TO ADJUST CARBURETOR (See Fig. 33)
The carburetor has been present at the factory and adjust-
ment should not be necessary° 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 (coun-
terclockwise) increases the supply of fuel to the engine
giving a richer fuel/air mixture.
IMPORTANT: DAMAGE TO THE NEEDLES AND THE
SEATS tN CARBURETOR MAY RESULT IF SCREW IS
TURNED IN TOO TIGHT
PRELIMINARY SETTING -
o Be sure you have a clean air filter, and the throttle
control cable is adjusted properly (see 'q'o ADJUST
THROTTLE CONTROL CABLE" in the Service and
Adjustments section of this manual).
• With engine off turn idle fuel adjusting needle in (clock-
wise) closing it finger tight and then turn out (counter-
clockwise) 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 (N) position.
• The high idle is set at the factory and cannot be
adjusted°
o !d!e speed setting - With throttle control lever in slow
(._) position, engine should idle at 1200 RPMo If
engine idles too slow or fast, turn idle speed adjusting
screw in or out until correct idle is attained.
o 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) approximately 3/4 turn to
obtain the best low speed performance.
° Recheck idle speed_ Readjust if necessary..
ACCELERATION TEST_
o Move throttle control lever from slow (,_) to fast (,_)
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 isfactory 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 YOUR
NEAREST AUTHORIZED SERVICE CENTER!
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS
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