Arctic Cat Sno Pro 120 Service Manual page 79

CAUTION
Never start the engine with the bleed screw open.
48. Place the emergency stop switch in the RUN position and
the ignition switch to the ON position. Start the engine.
The warning icon should go out within five seconds.
 NOTE: If the warning icon does not go out, shut the
engine off immediately and repeat step 47; then
repeat step 48.
49. Start the engine and allow it to run to operating tem-
perature; then shut the engine off and allow it to cool.
50. Add oil to the oil reservoir until oil is visible halfway
up in the sight glass.
 NOTE: At this time, connect Hood Harness Exten-
sion to the hood and connect the main harness con-
nector to the extension.
After running the engine to the proper operating tem-
perature, shut the engine off; then inspect for any signs
of coolant, gasoline, or oil leakage.
51. With the engine cool, loosen the bleed screw and
allow the coolant level in the filler neck to drop; then
with the bleed screw loose, add coolant into the filler
neck until no air is visible or heard at the bleed
screw. Tighten the bleed screw and add coolant to the
PC016A
reservoir if necessary.
 NOTE: If the coolant level in the filler neck suddenly
drops when the bleed screw is loosened, an air-lock
occurred in the cylinder head. Add coolant to the
filler neck until full before starting the engine.
52. Start the engine and allow it to run for five minutes.
Inspect for any signs of coolant leaks in the engine
compartment; then shut the engine off and allow it to
cool.
53. Repeat steps 51-52 (at least two more two times)
until no air is in the cooling system.
Operating the snowmobile with air in the cooling sys-
tem will cause severe damage to the engine.
54. Disconnect the hood harness extension; then install
the hood and side panels.
0746-166
CAUTION
CAUTION
2
2-59