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Periodic maintenance and adjustment
84
the engine off and make sure that the en-
gine oil drain bolts, the cylinder head cap,
and the oil filler cap are installed correct-
ly.
20. Turn the engine off, and then connect the
oil level gauge coupler. NOTICE: If oil is
leaking or the oil level warning indica-
tor comes on when the engine is run-
ning, immediately turn the engine off
and have a Yamaha dealer check the
snowmobile. Continuing to operate
the engine under such conditions
could cause severe engine damage.
[ECS00471]
21. Place the bottom panel in the original po-
sition, and then install the bolts.
22. Place the right lower cover in the original
position, and then install the screws and
the bolts (RS90P / RS90PLT /
RST90PGT).
RS90P / RS90PLT / RST90PGT
23. Install the top cover, the right side cover,
and the shroud (RS90P / RS90PLT /
RST90PGT), or install the right side cov-
er and close the shroud (RST90).
ESU14204
Cooling system
The coolant level should be checked before
each ride. In addition, the cooling system
must be bled at the intervals specified in the
periodic maintenance and lubrication chart.
WARNING
EWS00380
Do not remove the coolant reservoir cap
when the engine is hot. Scalding hot fluid
and steam may be blown out under pres-
sure, which could cause serious injury.
When the engine has cooled, place a thick
rag or towel over the coolant reservoir
cap, and slowly rotate the cap counter-
clockwise to the detent. This procedure al-
lows any residual pressure to escape.
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
RS90P / RS90PLT
RST90
1. Right lower cover
1
1. Coolant reservoir cap
1. Coolant reservoir cap
1
1
U8HV10E0.book Page 84 Monday, May 16, 2011 1:15 PM