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SERVmCE AND ADJUST
ENTS
TO ADJUST
CARBURETOR
(See Figs. 34 &
35)
The carburetor has been preset at the factory and adjust-
ment should not be necessary.
However, minor adjust-
ment may be required to compensate for differences in fuel,
temperature, altitude or loado If the carburetor does need
adjustment, proceed as follows:
In general, turning the mixture screw in (clockwise) de-
creases the supply of fuel to the engine giving a teaner fuel!
air mixture, Turning the mixture screw 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 SCREW IS
TURNED 1N TOO TIGHTI
PRELIMINARY
SETTING
o
Be sure you have a clean air filter, and the throttle
control cable and choke are adjusted properly (see
above).
=
With engine off turn idle mixture screw in (clockwise)
closing it finger tight and then turn out (counterclock-
wise) 1-1/4 to 1-t/2 turns.
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 tever in slow (,4_) position, hold
throttle lever against idle speed screw and adjust idle
speed screw to obtain I200 to 1400 RPM,,
-
While still holding throttle lever against idle speed
screw, turn idle mixture screw in (clockwise)
until
engine begins to die and then turn out (counterclock-
wise) until engine runs rough. Turn screw to a point
midway between those two positions
•
Continue to held throttle lever against idle speed screw
and adjust idle speed screw to obtain 900 to 1200 RPM.
Release throttle lever,
ACCELERATION
TEST-
-
Move throttle control lever from slow (*_)
to fast (,_)
position,
If engine hesitates or dies, turn idle mixture
screw out (counterclockwise)
I/8 turn_ Repeat test
and continue to adjust, if necess;try, until engine accef-
crates smoothty
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,
OVERSPEEDINGTHE
ENGINE ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
CAN
BE
DANGEROUS.
IFYOUTHINKTHEENGINE-GOVERNED
HIGH
SPEED
NEEDS
ADJUSTING,
CONTACT
YOUR
NEAREST
AUTHORIZED
SERVlCE
CENTER/
DEPARTMENT,
WHICH
HAS PROPER
EQUIPMENT
AND
EXPERIENCE
TO
MAKE
ANY
NECESSARY
ADJUSTMENTS.
IDLE SPEED
SCREW
IDLE MIXTURE
SCREW
THROTTLE
LEVER
FIG. 34
IDLE MIXTURE
LEVER
SCREW
FIG. 35
25
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