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. SERVICE AND ADJUSTMENTS
TO ADJUST CARBURETOR (See Fig. 32)
The carburetor has been preset at the factory and adjust-
ment should not be necessary. However, minor adjust:
ment may be required to compensate fo rdifferences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture valve 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 fue! 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 cleaner assembly must beassembled to the 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 full turn.
FINAL SETTING -
• Start engine and allow to warm for five minute& Make
final adjustments with engine running and shift/motion
control lever in neutral (N) position.
+ Move throttle control lever to slow (._) position: With
finger, rotate and hold throttle lever agains t 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 toa point midway
between those two positions. Re}ease throttle lever.
ACCELERATION TEST-
, Move throttle control lever from slow (,.a_) to fast (,_)
position, if engine hesitates or dies, turn idle mixture
valve 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. OVERSPEEDINGTHEENGINEABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINK THEENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS.
THROTTLE iDLE SPEED
LEVER SCRE_W
VALVE
FiG, 32
25
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