SERVICE AND ADJUSTM
ENGINE
TO ADJUST THROTTLE CONTROL CABLE
(See Fig. 31)
The throttle contro! has been preset at the factory and
adjustment should notbe necessary. Check adjustment as
described below before loosening cable° tf adjustment is
necessary, proceed as follows:
• With engine not running, move throttle control lever
from slow to choke position, Slowly move lever from
choke to fast position°
• Check that holes"A" in governor control leverand hole
in governor' plate line-up. If holes "A"are not aligned,
loosen clamp screw and movethrottle cable until holes
are aligne& Tighten clamp screw securely°
GOVERNOR
CONTROL LEVER
GOVERNOR
CONTROL PLATE
HOLES *'A" CLAMP
SCREW
THROTTLE
CABLE
FIG. 31
TO ADJUST CARBURETOR (See Fig. 32)
The carburetor has been preset at the factory and adjust-
ment should not be necessary. However, minor adjust-
mentmay be requiredtocompensatefor differencesinfuel,
temperature, altitude or load. ifthe carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture valve in (clockwise) de-
creasesthesupply offuel tothe enginegivinga leanerrue!/
air mixture. Turning the idle mixture valve out (counter-
clockwise)increases thesupplyoffuel 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 propedy
(see above),
o With engine off turn idle mixture valve in (clockwise)
closing it finger tight and then turn out (counterclock_
wise) 1 full tum.
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.
* Move throttle control leverto stow position. With finger,
rotate and ho[dthrottle lever against idlespeed screwy
Turn idle speed screw to attain 1750 RPM
° While still holding throttle lever' against idle speed
screw, turn idle mixture vaive in (clockwise) until en-
gine begins 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 idle mixture valve out
(counterclockwise) 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
GOVERNOR, WHICH IS FACTORY SET FOR PROPER
ENGINE SPEED. OVERSPEEDING THE ENGINE ABOVE
THE FACTORY HIGH SPEED SETTtNG CAN BE
DANGEROUS., IFYOU 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_
THROTTLE IDLE SPEED
LEVER SCREW
IDLE MIXTURE
VALVE
FIG. 32
o6
