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SERVICE AND ADJUSTMENTS
GOVERNED IDLE -
ENGINE
TO ADJUST THROTTLE CONTROL CABLE
(See Fig. 36)
The throttle control has been preset at the factory and ad-
ustment should not be necessary Check ad ustment as
described below before oosen ng cab e fad ustment s
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 hole in governor control lever and hole in
governor plate line-up If holes "A" are not aligned,
loosen clamp screw and move throttle cable until holes
are aligned Tighten clamp screw securely
TO ADJUST CARBURETOR (See Fig. 36)
The carburetor has been preset at the factory and adiust-
ment should not be necessary However, minor adjust-
ment may be required to cornpensate for differences in fuel,
temperature, altitude or load If the carburetor does need
adjustment, proceed as follows:
In general, turning the mixture screws in (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuel/
air mixture Turning the mixture screws out (counterclock-
wise) increases the supply of fuel to the engine giving a
richer fuel/air mixture
IMPORTANT:
DAMAGE TO THE NEEDLES AND THE
SEATS IN CARBURETOR MAY RESULT
IF SCREWS ARE 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 high speed mixture screw in
(clockwise) closing it finger tight and then turn out
(counterclockwise) 1-1/4 to 1-1/2 turns
Turn idle mixture screw in (clockwise) closing finger
tight and then turn out (counterclockwise) 1 turn
FINAL SETTING -
Start engine and allow to warm for five minutes. Make
final ad ustments with engine running and shift/motion
centre ever n 'NEUTRAL" post on
With throttIe control lever in "FAST" position, turn high
speed mixture screw in (clockwise) until engine begins
to die then turn out (counterclockwise) until engine
runs rough Turn screw to a point midway between
those two positions
With throttle control lever in "SLOW" position, turn idle
mixture screw in (clockwise) until engine begins to die
and then turn out (counterclockwise) until engine runs
rough Turn screw to a point midway between those
two positions
Move throttle control lever to "SLOW" position. With
finger, hold throttle shaft in closed position against
throttle stop (counterclockwise). Turn idle speed screw
to attain 1550 RPM. Release throttle shaft. Move
throttle control lever to attain 1750 RPM. Turn governor
idle screw until it contacts governor control lever.
ACCELERATION TEST.
Move throttle control lever from "SLOW" to "FAST"
position. If engine hesitates or dies, turn idle mixture
screw out (counterclockwise) 118 turn. Repeat test
and continue to adjust, if necessary, until engine accel-
erates 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. OVER-
SPEEDING THE ENGINE ABOVE THE
FACTORY HIGH SPEED SE_ING CAN
BE DANGEROUS IF YOU THINK THE
ENGINE-GOVERNED HIGH SPEED
NEEDS ADJUSTING, CONTACT YOUR
NEAREST AUTHORIZED SERVICE
CENTER, WHICH HAS PROPER EQUIP-
MENTAND EXPERIENCETO MAKE ANY
NECESSARY ADJUSTMENTS
IDLE SPEED
SCREW
\
THROTTLE
IDLE MIXTURE
SCREW
THROTTLE
CABLE
HIGH SPEED
MIXTURE SCREW
RNOR
LEVER
GOVERNOR
CONTROL
PLATE
HOLES'A"
FIG. 36
25