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TO ADJUST CARBURETOR
(See Fig. 32)
The carburetor has been preset at the factory and adjust-
ment should not be necessary.
However, minor adjust-
ment may be required tocompensate for differences in fuet,
temperature, altitude or load. If the carburetor does need
adjustment,
proceed as follows:
In general, turning idle mixture valve in (clockwise) de-
creases the supply of fuel to the engine giving a leaner fuetJ
air mixture.
Turning the idle mixture valve out (counter-
clockwise) increases the supply of fuel to the engine giving
a richer fuel/air mixture.
IMPORTANT:
DAMAGE TO THE NEEDLE VALVE AND
THE SEAT IN CARBURETOR MAY RESULT _FSCREW IS
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 [s adjusted propedy
(see above).
°
With engine off turn idle mixture valve in (clockwise)
closing it finger tight and then turn out (counterclock-
wise)
1 full turn.
F_NAL 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.
•
Move throttle control lever to stow (._)
position. With
finger, rotate and hold throttle lever against idle speed
screw. Turn idle speed screw to attain 1750 RPM.
•
While still holding throttle
Iever against idle speed
screw, turn idle mixture valve in (clockwise) until en-
gine begins to die and then turn out (counterclockwise)
until engine runs rough, Turn valve to a point midway
between those two positions.
Release throttle lever.
ACCELERATION
TEST
-
•
Move throttle
control
lever from slow (,a_) to fast (_,)
position.
If engine
hesitates
or dies, turn idle mixture
valve 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.
OVERSPEEDtNG
THE ENGINEABOVE
THE
FACTORY
HIGH
SPEED
SETTtNG
CAN
BE
DANGEROUS,
IF YOU 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.
THROTTLE
IDLE SPEED
LEVER
SCRE"N
RG. 32
25
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