Carburetor; Throttle Cable - Arctic Cat 120 Sno Pro 2011 Operator's Manual

6. Install the oil level stick; then
tighten until snug. Install the access
plug.
7. Close the hood and secure with the
straps and latch.

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.
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.
The throttle arm on the carburetor should
also contact the speed control screw
when the throttle lever is released.
To adjust the throttle cable, use the fol-
lowing procedure:
Do not attempt to adjust the throttle
cable with the engine running. Per-
sonal injury could result.
1. Loosen the throttle cable jam nuts.
2. Pull all slack from the throttle cable
0744-921
wire and exert slight tension on the
wire.
3. Tighten the throttle cable jam nuts.
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.
Speed Control Screw
! WARNING
! WARNING
0744-922
0744-949
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