Arctic Cat Sno Pro 120 2011, Service Manual

Page: 237 / 535

4
4-11
4. Rotate the PTO-side carburetor idle speed screw
clockwise until the tachometer reads slightly above
1500 RPM; then rotate the idle speed screw counter-
clockwise to achieve exact 1500 RPM reading. The
piston valves should now be synchronized and the
engine should idle without holding any throttle pres-
sure.

NOTE: If the engine has no ignition spark with the
throttle in the idle position but has proper spark with
the throttle lever slightly compressed, the carburetor
safety switches must be repositioned.
5. Test the throttle control lever by compressing and
releasing it several times. The lever must return to
the idle position quickly and completely.
Throttle Cable
REMOVING
743-705A
1. Loosen the throttle cable adjuster jam nuts.
2. Remove the mixing body tops.
3. Remove the throttle cables from the piston valves.
4. Remove the throttle cables from the mixing body
tops.
5. Remove the handlebar pad and console.
6. Remove the throttle cable end from the throttle lever.
7. Remove the cable from the throttle switch assembly.

NOTE: It may be necessary to remove the PTO-side
carburetor.
8. Remove the E-ring securing the oil-injection cable to
the control arm. Account for a washer.
9. Loosen the jam nut securing the adjustment cable;
then remove the cable from the oil-injection pump.
INSTALLING
1. Route the throttle cable from the throttle switch
assembly to the carburetors and oil-injection pump;
avoid any sharp bends or moving parts.
2. Install the oil-injection adjustment cable on the oil-
injection pump; secure with the jam nuts.
3. Install the oil-injection cable on the control arm;
secure with a washer and E-ring.

NOTE: Install the PTO-side carburetor if removed.
4. Install the throttle cable into the throttle switch
assembly making sure it snaps into place.
5. Install the throttle cable end on the throttle lever.
6. Install the handlebar pad and console.
7. Attach the throttle cable to each throttle valve. The
valve must seat in the groove of the throttle cable
end; then thread the throttle cable into each mixing
body top.
8. Install each piston valve and mixing body top on the
carburetors. Tighten securely; then secure the tops to
the carburetors with the plates.
9. Adjust the carburetors (see ADJUSTING sub-sec-
tion).
10. Synchronize the oil-injection pump (see Related
Items in this section).
Choke Cable
REMOVING
736-596A
1. Bend down the lock tabs locking each brass choke
cable housing on each carburetor.
2. Using a 12-mm wrench, remove each brass choke
cable housing from each carburetor. Account for the
lock tab washers.
3. Remove each brass plunger and spring from the cable
end; then remove each brass choke cable housing.
! WARNING
DO NOT operate the snowmobile when any compo-
nent 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.
KEY
1. O-Ring
2. Throttle Cable
3. Jam Nut
4. E-Ring
CAUTION
Compress the throttle control lever to ensure free
movement. If the throttle cable sticks or binds, correct
the problem before starting the engine.
KEY
1. Choke Cable
2. Knurled Nut
3. Choke Lever
Manual
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