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SERVICE AND ADJUSTMENTS
ENGINE
ACCELERATION
TEST-
TO ADJUST
THROTTLE
CONTROL
CABLE
(See Fig.
34 &
35)
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 to
fast (,1_) position,
•
Check that speed control lever is against stop screw. If
it is not, loosen casing clamp screw and pull throttle
cable until lever is against screw. Tighten clamp screw
securely.
TO ADJUST
CARBURETOR
(See
Fig. 36)
The carburetor has been present at the factory and adjust-
ment should not be necessary. However, minor adjustment
may be required to compensate
for differences
in fuel,
temperature,
altitude or load. If the carburetor does need
adjustment,
proceed as follows:
In general, turning the adjusting
needles in (clockwise)
decreases the supply of fuel to the engine giving a leaner
fuel/air mixture. Turning the adjusting needles out (coun-
terclockwise)
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 SCREW IS
TURNED IN TOO TIGHT.
PRELIMINARY
SETTING -
Be sure you have a clean air filter, and the throttle
control cable is adjusted properly (see above).
With engine off turn idle fuel adjusting needle in (clock-
wise) closing it finger tight and then turn out (counter-
clockwise) 1-1/4 turns_
Turn main fuel adjusting needle in (clockwise) closing
finger tight and then turn out (counterclockwise)
1 turn.
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.
With throttle control lever in fast (,_) position, turn main
fuel adjusting needle in (clockwise) until engine begins
to die then turn out (counterclockwise)
until engine
runs rough. Turn needle to a point midway between
those two positions.
Idle sDeed setting - With throttle control lever in slow
(,,=b) position,
engine should
id{e at 1400 R_M. If
engine idles too slow or fast, turn idle speed adjusting
screw in or out until correct idle is attained.
•
Idle fuel needle settine - With throttle control leve_rin
slow (,4=,) position, turn idle fuel adjusting needle in
Iclockwise) until engine begins to die and then turn out
counterclockwise)
until engine runs rough. Turn needle
to a point midway between those two positions.
•
Recheck idle speed. Readjust if necessary.
Move throttle
control
lever from slow (-=_) to fast (._)
position.
If engine
hesitates
or dies, turn idle mixture
screw 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.
OVERSPEEDINGTHEENGINEABOVE
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.
CASING
CLAMP
SCREW \
STOPSCREW
SPEED CONTROL
THROTTLE
CABLE
FIG. 34
STOP
SPEED
CONTROL
LEVER
FIG. 35
SCREW
__
,IDLE FUEL
ADJUSTING
NEEDLE
MAIN FUEL
ADJUSTING
NEEDLE
27
FIG. 36
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