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• o
SERVICE AND ADJUSTMENTS
ENGINE
TO ADJUST
THROl-I'LE
CONTROL
CABLE
(See Fig. 33 & 34)
The throttle control has bden preset at the factory and
adjustment should not be necessary. Check adjustment as
described below before loosening cabte. If adjustment is
necessary, proceed as follows:
•
With engine net running, move throttle control lever to
fast (,_,) position.
•
Check that speed control lever isagainst step 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. 35)
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 theadjusting
needles in (c_ockwise)
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
SE'I-I'ING -
•
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-i/4 turns.
Turn main fuel adjusting needle 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 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 soeed setting - With throttle control lever in slow
(,_b) position, engine should idle at 1400 RPM. If
engine idles too slow or fast, turn idle speed adjusting
screw in or out until correct idle is attained.
Idle fuel needle setting - With throttle control lever in
slow (,_)
position, tum idle fuel adjusting needle in
(clockwise) until engine begins to die and then turn out
(counterclockwise)
until engine runs rough. Tum needle
to a point midway between those two positions.
Recheck idle speed. Readjust if necessary.
ACCELERATION
TEST -
•
Move throttle
control lever from slow (,_m,) 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.
OVERSPEEDING
THE ENGINE AB_OVE
THE
FACTORY
HIGH
SPEED
SETTtNG
CAN
BE
DANGEROUS.
IF YOU THINK THE ENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST
AUTHORIZED
SERVICE
CENTER/
DEPARTMENT,
WHICH HAS PROPER
EQUIPMENTAND
EXPERIENCE
TO
MAKE
ANY
NECESSARY
ADJUSTMENTS.
CASING
STOP SCREW
SPEED CONTROL
LEVER
SCREW
THROTTLE
CABLE
FIG. 33
STOP
27
SPEED
CONTROL
LEVER
FIG. 34
/IDLE
FUEL
IDLE SPEED_-_-_I,_'_
j
ADJUSTING
SCREWADJUSTING ____NEEDLE
FIG. 35
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