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Periodic maintenance and adjustment
84
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
RS90GT / RS90LTGT
RST90
RST90GT
RS90GT / RS90LTGT
To check the coolant level
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Remove the top cover. (See page 63 for
removal procedures.)
3. Check the coolant level in the coolant re-
covery tank when the engine is cold. If the
coolant level is below the “COLD LEVEL”
mark, add coolant until it reaches the
“COLD LEVEL” mark. (See the following
section “Replenishing the coolant” for
more details.) NOTICE: If coolant is not
available, use distilled water or soft
tap water instead. Do not use hard wa-
ter or salt water since it is harmful to
the engine. If water has been used in-
stead of coolant, replace it with cool-
ant as soon as possible, otherwise the
cooling system will not be protected
against frost and corrosion. If water
has been added to the coolant, have a
Yamaha dealer check the antifreeze
content of the coolant as soon as pos-
sible, otherwise the effectiveness of
the coolant will be reduced.
[ECS00492]
1. Coolant reservoir cap
1. Coolant reservoir cap
1. Coolant reservoir cap
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1
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U8JA11E0.book Page 84 Monday, June 14, 2010 10:22 AM