Yamaha RST90G Owner's Manual page 84

Periodic maintenance and adjustment
Bleeding the cooling system
The cooling system must be bled if the cool-
ant reservoir becomes empty, if air can be
seen in the coolant reservoir, or if there is a
cooling system leak. Consult a Yamaha deal-
er.
ECS00501
NOTICE
Operating the engine with an improperly
bled cooling system can cause overheat-
ing and severe engine damage.
Replenishing the coolant
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Remove the shroud, the right side cover,
and the top
RST90TFL / RST90TFY (see page 60 for
the procedures)], or open the shroud
[RST90 (see page 62 for the proce-
dures)].
3. Remove the coolant reservoir cap and
add coolant until it reaches the "COLD
LEVEL" mark.
RST90
1. "COLD LEVEL" mark
2. Coolant reservoir cap
78
cover [RST90TF /
RST90TF / RST90TFL / RST90TFY
2
1. "COLD LEVEL" mark
2. Coolant reservoir cap
RST90
RST90TF / RST90TFL / RST90TFY
Recommended antifreeze:
High-quality ethylene glycol anti-
freeze containing corrosion inhibitors
Antifreeze and water mixing ratio:
3:2
Total amount:
5.40 L (5.71 US qt, 4.75 Imp.qt)
1