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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 berequiredto compensate for differences infuel,
temperature, altitude or Ioad_ If the carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture valve in (ctocl_ise) de-
creases the supply of fuel to the engine giving a leanerfuel/
air mixture, Turning the idle mixture valve out (counter.-
clockwise) increases the supplyof fuel to the enginegiving
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 -
o Air cleaner assembly must be assembled to the carbu-
retor when making carburetor adjustments..
o Be sure the throttle control cable is adjusted properly
(see above).
o With engine off turn idle mixture vafve in (clocl_ise)
closing it finger tight and then turn out (counterclock-
wise) 1 full turn.
FINAL SETTING -
• Start engineand allow to warm for five minutes. Make
final adjustments with engine running and shift/motion
control lever in "NEUTRAL" position.
o Move throttle control leverto "SLOW" position° With
finger, rotate and hold throttle lever against idle speed
screw. Turn idle speed screw to attain 1750 RPM_
• While stiII holding throttle lever against idle speed
screw, turn idle mixture valve in (cloclo,vise) until en-
ginebegins 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 idlemixture
valve out (counterclockwise) 1/8 turn. Repeatrostand
continue to adjust, tf necessary, until engine acceler-
ates smoothlyo
High speed Stop is factory adjusted Do not adjust -
damage may resutL
IMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR. WHICH IS FACTORY SET FOR PROPER
ENGINE SPEED,.OVERSPEEDINGTHE ENGINEABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IFYOU THINK THE ENGINE-GOVERNED
H|GH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEARESTAUTHORIZED SERVICE CENTER, WHICH HAS
PROPEREQUIPMENTAND EXPERIENCETO MAKEANY
NECESSARY ADJUSTMENTS.
THROTTLE
IDLE SPEED
SCREW
IDLE MIXTURE VALVE
FIG. 32
25
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