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$ERVnCE A 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.. Checkadjustment as
described below before loosening cable° If adjustment is
necessary, proceed as follows:
o With engine not running, move throttle control lever
from slow (,_) to choke (X) position. Slowly move
lever from choke ( _,.) to fast (,_) position°
- Check that holes"A" ingovernor control lever and hole
in governor plate line-upo If holes "A" are not atigned,
loosen clamp screw and move throttle cable until holes
are aligned, Tighten clamp screw securely..
GOVERNOR GOVERNOR
CONTROL LEVER CONTROL PLATE
HOLES "A"
CLAMP THROTTLE
SCREW CABLE
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 requiredto compensate for differences infuel,
temperature, altitude or load. Ifthe carburetordoes need
adjustment, proceed as follows:
In general, turning idle mixture valve in (clockwise) de-
creases the supply offuel to theengine givinga leaner fuel/
air mixture. Turning the idle mixture valve out (counter-
clockwise) increasesthe supply offuel totheengine giving
a richerfuel/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 be assembled 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) t full turn,_
FINAL SETTING -
= Start engine and allow to warm for five minutes, Make
final adjustments wLthengine running and shift/motion
control lever in neutral (N) position.
• Move throttle control lever to slow (,_!) position. With
finger, rotateand hold throttle Iever 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 beg!ns 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 leverfrom slow (,_!) 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° OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTING CAN BE
DANGEROUS. IF YOU THINK THE ENGINE-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 SCREW
IDLE MIXTURE
VALVE
FIG. 30
23