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SERVICE AN ADJUSTMENTS
ENGINE
TO ADJUST THROTTLE CONTROL CABLE (See Fig. 29)
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, proceed as follows:
•With ,engine,not, running_, move throttle control lever from SLOW to CHOKE position. Slowly movelever from "CHOKE" to "FAST" position.
•Checkthat holes"A" in governor control lever and hole in governor plate
GOVERNOR | GOVERNOR |
CONTROLLEVER | CONTROL PLATE |
|
HOLES"A"CLAMPTHROTTLE
SCREWCABLE
FIG. 29
TO ADJUST CARBURETOR (See Fig. 30)
The carburetor has been preset at the factory and adjust- ment should not be necessary. However, minor adjust* ment may be required to compensate for differences in fuel, temperature, altitude or load. ff the carburetor does need adjustment, proceed as follows:
In general, turning idle mixture vafve in (clockwise) de- creases the supply of fuel to the engine giving a leaner fuel/ air mixture. Turning the idle mixture valve out (counter- clockwise) increases the supply of fuel to the engine giving a richer fuel!air mixture.
IMPORTANT: DAMAGE TO THE NEEDLE VALVE AND THE SEAT IN CARBURETOR MAY RESULT IF SCREW IS
TURNED IN TOO TIGHT.
PRELIMINARY SETTING -
•Air cteaner assembly must be assembled tothe carbu- retor when making carburetor adjustments.
•Be sure the throttle control cable is adjusted properly (see above).
•With engine off turn idle mixture valve in (clockwise) closing it finger tight and then turn out (counterclock- wise) 1 fullturn.
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.
•Move throttle control lever to "SLOW" position. With finger, rotate and hold throttle lever against idle speed screw, Turn idle speed screw to attain 1750 RPM.
•While still holding throttle lever against idle speed screw, turn idle mixture valve In (clockwise) until en- gine begins to die and then turn out (counterclockwise) until engine runs rough. Turn valve to a point midway between those two positions. Release throttle lever.
ACCELERATION TEST -
•Move throttle control lever from "SLOW" to "FAST"
position, if engine hesitates or dies, turn idle mixture valveout (counterclockwise) 1/Sturn, Repeattest 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 ENGINEABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINK THE ENGINE.GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEARESTAUTHORIZED SERVICE CENTER, WHICH HAS PROPER EQUIPMENT AND EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS,
THROTTLE | IDLE SPEED |
LEVER | SCREW |
IDLE MIXTURE
VALVE
FIG, 30
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