Arctic Cat Sno Pro 120 2013, Operator'S Manual

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11
Carburetor
The carburetor has been calibrated for
average riding conditions; however, alti-
tude, temperature, and general wear may
necessitate certain carburetor adjust-
ments. Since carburetor adjustments criti-
cally affect engine performance, Arctic
Cat recommends that any changes in
internal carburetor calibration be made
by an authorized Arctic Cat Snowmobile
dealer; however, three external adjust-
ments can be made on the carburetor.
These are the throttle stop screw, idle fuel
adjuster screw, and throttle cable.
0744-921
Throttle Stop Screw
This screw controls the seating position
of the throttle valve which in turn deter-
mines the proper idle speed. Rotate the
screw clockwise to increase engine idle
speed and counterclockwise to decrease
engine idle speed.
Idle Fuel Adjuster Screw
This adjuster screw determines the fuel/
air mixture for idling. To adjust, use the
following procedure:
1. Start the engine and allow to run at
half throttle 5-10 minutes to warm up.
2. Place the throttle in the idle position;
then rotate the idle fuel adjuster
screw/cap in or out within the
adjustment range to obtain smooth
low speed performance.
Throttle Cable
The correct throttle cable adjustment is
when (with the engine OFF) the carbure-
tor throttle is completely open (against its
limit) while the throttle lever comes just
short of contacting the handlebar grip.
With the lever in this position, the throttle
arm on the carburetor should be in con-
tact with the speed control screw.
To adjust the throttle cable, use the fol-
lowing procedure:
1. Loosen the throttle cable jam nuts.
0744-922
2. Pull all slack from the throttle cable
wire and exert slight tension on the
wire.
3. Tighten the throttle cable jam nuts.
Speed Control Screw
0744-949
! WARNING
Do not attempt to adjust the throttle
cable with the engine running. Per-
sonal injury could result.
! WARNING
DO NOT operate the snowmobile
when any component in the throttle
system is damaged, frayed, kinked,
worn, or improperly adjusted. If the
snowmobile is operated when the
throttle system is not functioning
properly, personal injury could result.