Yamaha RST90G Owner's Manual page 83

allows any residual pressure to escape.
When the hissing sound has stopped,
press down on the cap while turning coun-
terclockwise and remove it.
RST90
1
1. Coolant reservoir cap
RST90TF / RST90TFL / RST90TFY
1
1. Coolant reservoir cap
To check the coolant level
1. Place the snowmobile on a level surface
and apply the parking brake.
2. Remove the shroud and the right side
cover [RST90TF /
RST90TFY (see page 60 for the proce-
dures)], or open the shroud [RST90 (see
page 62 for the procedures)].
3. Check the coolant level in the coolant
reservoir 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
Periodic maintenance and adjustment
RST90TFL /
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
water or salt water since it is harmful
to the engine. If water has been used
instead of coolant, replace it with
coolant as soon as possible, other-
wise the cooling system will not be
protected against frost and corrosion.
If water has been added to the cool-
ant, have a Yamaha dealer check the
antifreeze content of the coolant as
soon as possible, otherwise the effec-
tiveness of the coolant will be re-
duced.
[ECS00493]
RST90
1. "COLD LEVEL" mark
RST90TF / RST90TFL / RST90TFY
1. "COLD LEVEL" mark
4. Install the right side cover and the
shroud, or close the shroud.
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