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SERVICE A ADJUSTMENTS
ENGINE
TO ADJUST THROTTLE CONTROL CABLE
(See Fig, 31)
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 (IX) position. Slowly move
lever from choke ([XI) to fast (,_) position,
= Oheck to see if hole in throttle lever and hole in speed
control bracket are aligned.
. If hetes are not atigned, loosen cable clamp screw and
align the holes by inserting a pencil or a 1/4" drill bit
through both holes.
• Pull throttle cable up to remove slack and tighten cable
clamp screw, Remove alignment pencil or drill bit.
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 for differences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
tn general, turning the adjusting needles in (clockwise)
decreases the supply of fuel to the engine giving a leaner
fueVair mixture, Turning the adjusting needles out (counter-
clockwise) increases the supply of fuel to the engine giving
a richer fueVair mixture.
f,MPGRTANT: DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT IF NEEDLE IS
TURNED IN TOO TIGHT.
NOTE: The carburetor on this engine is tow emission. It is
equipped with an idle fuel adjusting needte with a limiter
cap, which allows some adjustmentwithin the limits allowed
by the cap. Do not attempt to remove the limiter cap. The
]!miter cap cannot be removed without breaking the adjusting
needle.
= Be sure you have a clean air fiiter and the throttle
control cable is adjusted properly (see above).
= Start engine and allow to warm for five minutes. Make
adjustments with engine running and shift/motion control
lever in neutral iN) position.
• Idle _peed settit_ - With throttJe control lever in slow
(,glb) position, engine should idle at 1750 RPM. If
engine idles too slew or fast, turn idle speed adjusting
screw Jnor out until correct idle is attained.
= Idle fue! need_ - With throttle control lever in
slow (,ak,) position, turn idle fuel adjustment needle in
(clockwise) until engine begins to die and then turn out
(counterclockwise) untii engine runs rough. Turn needle
to a point midway between those two positions.
• Recheck idle speed. Readjust if necessary.
ACCELERATION TEST -
Move throttle control lever from stow (,,_m.)to fast (,_)
positior_. If er_gine hesitates or dies, turn idte fuet
adjusting needle out (counterclockwise) 1/8 turn. Re-
peat 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 Er4GINE
GOVERNOR, WHICH IS FACTORY SET FOR PROPER
ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HiGH SPEED SETTING CAN BE
DANGEROUS. 1F YOU THINKTHE ENGINE-GOVERNED
HIGH SPEED NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY
ADJUSTMENTS.
CABLE CLAMP
SCREW
SPEED CONTROL
BRACKET
THROTTLE
LEVER
FIG. 31
IDLE SPEED
ADJUSTING
SCREW _-"-'_-_'_"_"-_-'--'-1_ "
IDLE FUEL /' ; -" 1
FIG, 32
25