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 -
oBe sure you have a clean air filter, and the throttle control cable is adjusted properly (see 'q'oADJUST 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.
oIdle 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_
oMove 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
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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