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SERVICE: AND ADJUSTMENTS
ENGINE
TO ADJUST
THROTTLE
CONTROL
CABLE
(See Figs. 38 & 39)
The throttte control has been preset at the factory and
adjustment should not be necessary. Check adjustment as
described below before loosening cable, tf adjustment is
necessary, proceed as foltows:
o
With engine not running, move throttle control lever to
fast (,9_) position.
o
Check that speed control lever is against stop screw. If
it is note loosen casing clamp screw and pull throttle
cable until lever is against screw, Tighten clamp screw
securely.
TO ADJUST
CARBURETOR
(See
Fig, 40)
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 not
need adjustment, proceed as foflows:
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 suppiy of fueI to the engine
giving a richer fue!/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 adiusted 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-!/4 turns.
Turn main fuel adjusting needle in (c!ockwise) cfcsing.
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 fever in neutral (N) position.
With throttle control lever in fast (@) position, turn main
fue! 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.
!die soeed settin.g - With throttle contro! lever in slow
(,,_)
position, engine should idte at !400 RPM. if
engine idles too slow or fast, turn idle speed adjusting
screw in or out until correct idle is attained.
o
ldle fue_1½qeed£%_ett£n
9 - With throttle control lever in
slew (_)
position, turn idle fuel adjusting needle in
(clockwise) 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.
ACCELERAT!ON
TEST
-
o
Move throttte control
tever from slow (_)
to fast (,_)
position.
If engine
hesitates
or dies, turn idle mixture
screw out (counterclockwise)
!/8 turn. Repeat test an d
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
ENGINESPEED.
OVERSPEEDING
THE ENGINE ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
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.
CASING
CLAMP
SCREW
STOP SCREW
SPEED CONTROL
THROTTLE
CONTROL
CABLE
F_G. 38
STOP
SCREW
FIG= 39
IDLE SPEED
ADJUSTING
SCREW
26
F_G, 40
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