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Periodic maintenance and adjustment
87
RST90
RST90PGT
4. Install the right side cover and the shroud
(RST90PGT), or close the shroud
(RST90).
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.
NOTICE
ECS00500
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 cover (RST90PGT), or open
the shroud (RST90). [See page 63
(RST90PGT) or page 67 (RST90) for the
procedures.]
3. Remove the coolant reservoir cap and
add coolant until it reaches the “COLD
LEVEL” mark.
RST90
RST90PGT
1. “COLD LEVEL” mark
1. “COLD LEVEL” mark
1
1. “COLD LEVEL” mark
2. Coolant reservoir cap
1. “COLD LEVEL” mark
2. Coolant reservoir cap
2
1
U8HV10E0.book Page 87 Monday, May 16, 2011 1:15 PM