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• Remove air cleaner cover, filter and
cadddge
plate to expose carburetor
choke (see "AIR FILTER" in the
Maintenance
section of this manual).
• Choke should be closed. If it is not,
loosen casing clamp screw and move
choke cable until choke is completely
closed. Tighten casing clamp screw
securely.
• Reassemble
air cleaner.
Clamp Screw_
Quarter Circle
Swivel
clamp. I
Screw_
"'-- Choke Lever
TO ADJUST
CARBURETOR
The carburetor
has been preset at the
factory and adjustment
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 adjust-
ment, proceed as follows:
In general, tuming the mixture screw In
(clockwise)
decreases
the supply of fuel
to the engine giving a leaner fuel/air
mixture.
Turning the mixture screw out
(counterclockwise)
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 it screw
is tumed in too tight.
PRELIMINARY
SETTING
-
• Be sure you have a clean air filter, and
the throttle control cable
and choke are
adjusted properly (see above).
• With engine off tum idle mixture screw
In (clockwise)
closing it finger tight and
then turn out (counterclockwise)
1-1/4
to 1-112 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 lever in slow
position, hold throttle lever against idle
speed screw and adjust idle speed
screw to obtain 1200 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 tum out (counterclock-
wise) until engine runs rough.
Turn
screw to a point midway between those
two positions.
• Continue to hold 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 (counter-
clockwise)
1/8 tum.
Repeat test and
continue to adjust, if necessary,
until
engine accelerates
smoothly.
High speed stop is factory adiusted.
Do
not adjust - damage may result.
IMPORTANT:.
Never tamper with the
engine governor, which is factory set for
proper engine speed.
Overspesding
the
engine above the factory high speed
setting can be dangerous.
If you think the
engine-govemed
high speed
needs
adjusting, contact your nearest authorized
service
center/department,
which has
proper equipment
and experience
to
make any necessary
adjustments.
ldle Speed
crew
Idle Mixture
Screw
hrottle Lever
Idle Speed
Screw
Throttle
Mixture
Lever
26
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