Arctic Cat Sno Pro 120, Service Manual

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4
4-11
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 Carburetor - ADJUST-
ING in this section).
10. Synchronize the oil-injection pump (see Oil-Injec-
tion Pump in this section).
Choke Cable
REMOVING
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.
4. Remove the screws securing the console.
5. Position the choke lever in the middle-choke posi-
tion; then remove the knurled nut securing the choke
lever housing to the console.
725-001A
6. Slide the choke lever housing from the console.
7. Cut any cable ties used to secure the choke cable and
remove the choke cable from the engine compartment.
INSTALLING
1. Position the choke lever in the middle-choke posi-
tion; then from the back side of the console, insert
the choke lever housing through the console. Secure
with the knurled nut.
2. Route the choke cable from the console to each car-
buretor; avoid any sharp bends or moving parts.
3. Install each brass choke cable housing onto the cable
end; then install each spring and brass plunger.
4. Place the lock tab washer on each brass housing and
insert a choke plunger into each carburetor.
5. Thread each brass choke cable housing into each car-
buretor and tighten. Bend the lock tab up to secure
the brass housing. Adjust the choke cable (see
Carburetor - ADJUSTING in this section).
6. Place the console into position and secure with the
screws.
Fuel Pump
PRELIMINARY CHECKS

NOTE: Make sure adequate gasoline exists in the
gas tank, all hoses are clear and free of kinks and
obstructions, the fuel filter is not plugged or dam-
aged, fuel and impulse hoses are in good condition,
and evidence of good impulse exists at the crankcase
impulse fitting.
TESTING PRESSURE
1. Connect Fuel Pressure Test Kit between fuel pump and
carburetor using a piece of fuel hose and a T-fitting.
2. Place snowmobile on a safety stand and start the
engine. The specified pressures must be as indicated.
3. Remove gauge and hose and connect fuel hose to
carburetor.
CAUTION
Compress the throttle control lever to ensure free
movement. If the throttle cable sticks or binds, correct
the problem before starting the engine.
1000-2000 RPM 3.0-3.5 psi
3000-4000 RPM 4.5-5.5 psi
5000-6000 RPM 6.0-7.0 psi