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ADJUSTING
CARBURETOR
(Single)
The carburetor has been calibrated at
the factory for average riding condi-
tions; however, altitude, temperature,
and general wear may necessitate cer-
tain carburetor adjustments. Be sure
the correct carburetor main jet for
the operating temperature, altitude,
and type of gasoline is being used
(see Selecting Carburetor Main
Jet(s)
section).
adjustments critically affect engine
performance, Arctic Cat recommends
that all changes in internal carburetor
calibration be made by an authorized
Arctic Cat Snowmobile dealer; how-
ever, four external adjustments can be
made on the carburetor. These are the
choke cable travel, piston valve, pilot
air screw, and idle speed screw. Due to
cable "stretch," it is recommended to
check throttle cable tension periodi-
cally and adjust the swivel adapter as
necessary.
NOTE:
Carburetor
ments and changing the main jet
may be done by the snowmobile
owner if qualified to do so. If the
owner does not feel qualified,
take the snowmobile to an
authorized Arctic Cat Snowmo-
bile dealer for this service. This
service is at the discretion and
expense
of
owner.
Adjusting Choke
Cable
1. Be sure the ignition switch key is
in the OFF position and the park-
ing brake is set.
52
Since
carburetor
adjust-
the
snowmobile
2. Loosen the jam nut securing the
choke cable adjuster. Rotate the
choke cable adjuster clockwise
until it bottoms against the brass
plunger cap.
3. Slowly rotate the choke cable
adjuster counterclockwise while
checking the choke lever for free-
play. As soon as all free-play has
been removed from the end of the
lever, stop rotating the adjuster.
4. With free-play removed from the
lever, slowly rotate the choke
cable adjuster once again clock-
wise while checking the choke
cable lever for free-play. Adjust
until 3 mm (1/8 in.) free-play
between front bottom edge of
lever and housing is attained.
Securely tighten the adjuster jam
nut.
Adjusting Piston Valve
1. Remove the air-intake silencer
boot; then rotate the idle speed
screw counterclockwise until all
spring tension is removed.
732-848B
MAINTENANCE
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