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SERVICE
AND ADJUSTMENTS
ENGINE
TO ADJUST
THROTTLE
CONTROL
CABLE
(See Fig. 31 )
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:
o
With engine not running, move throttle control lever
from siow (,_,)
to choke (IXt) position.
Slowly move
lever from choke (I\l) to fast (,1_) position.
•
Check that holes "A" in governor control Iever and hole
in governor plate line-up,
tf holes 'W' are not aligned,
loosen clamp screw and move throttle cable until holes
are aligned.
Tighten clamp screw securely.
GOVERNOR
GOVERNOR
CONTROL
LEVER
CONTROL
PLATE
1
\
O
O
HOLES "A"
CLAMP
SCREW
THROTTLE
CABLE
FiG. 31
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 to compensate for differences in fuel,
temperature, altitude or load. If the carburetor does need
adjustment, proceed as follows:
In general, turning idle mixture vatve in (clockwise) de-
creases the supply of fuel to the engine giving a Ieaner fuel/
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
IF SCREW 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 is adjusted properly
(see above).
o
With engine off turn idle mixture valve in (clockwise)
closing it finger tight and then turn out (counterclock-
wise) t full 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.
,,
Move throttle control lever to slow (,_)
position. With
finger, rotate and hold throttle lever against idle speed
screw. Turn idle speed screw to attain 1750 RPM.
,
While still holding throttle lever 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 (,,_)
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.
OVERSPEEDtNGTHE
ENGINE ABOVE
THE
FACTORY
HIGH
SPEED
SETTING
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
SCREW
IDLE MIXTURE
VALVE
FroG.32
26
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