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TO ADJUST CARBURETOR
NOTE: The carburetoron this engine is
low emission. It is equippedwithan idle
fuel adjustingneedle witha limitercap,
which allowssome adjustmentwithin the
limitsallowed by the cap. Do not attempt
to remove the limitercap. The limitercap
cannot be removed withoutbreakingthe
adjusting needle.
The carburetorhas been preset at the fac-
tory and adjustmentshouldnot be neces-
sary. However, minor adjustmentmay be
requiredto compensatefor differencesin
fuel, temperature, altitudeor load. If the
carburetordoes need adjustment,proceed
as follows:
tn general, turningidlemixturevalve in
(clockwise) decreases the supplyof fuel to
the engine givinga leaner fueltair mixture.
Tuming the idle mixturevalve out
(counterclockwise)increases the supply of
fuel to the engine givinga richerfuel/air
mixture.
IMPORTANT: Damage to the needle valve
and the seat in carburetormay resultif
screw is turned in too tight.
PRELIMINARY SETTING -
• Air cleaner assembly must be assem-
bled to the carburetor when making car-
buretor adjustments.
o Be sure the throttle control cable is
adjusted properly (see above).
FINAL SETTING -
o Start engine and allow to warm for five
minutes. Make final adjustments with
engine running and shift/motion control
lever in neutral (N) position.
o Move throttle control lever to slow posi-
tion. With finger, rotate and hold throttle
lever against idle speed screw. Turn idle
speed screw to attain 1750 RPM.
o While still holding throttle lever against
idle speed screw, turn idle mixture valve
full travel clockwise then counterclock,
wise until engine runs rough. Turn valve
to a point midway between those two
positions. Release throttle lever.ACCEL-
ERATION TEST -
o Move throttle control lever from slow to
fast position. If engine hesitates or dies,
tum idle mixture valve out (counter-
clockwise) 1/8 turn. Repeat test and
continue to adjust, if necessary, until
engine accelerates smoothly.
High speed stop is factory adjusted. Do
not adjust--damage may result.
IMPORTANT: Never tamper with the
engine govemor, which is factory set for
proper engine speed, overspeeding the
engine above the factory high speed set-
ting can be dangerous, if you think the
engine-governed high speed needs
adjusting, contact your nearest authorized
service center, which has proper equip-
ment to make any necessary adjustments.
Idle Speed Throttle
Screw Lever
I
Idle Mitre
ValveWith
Limiter
26
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