Cooling System - Yamaha APEX RX10RY Owner's Manual

Periodic maintenance and adjustment
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.
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ESU12013

Cooling system

The coolant level should be checked before
each ride. In addition, the cooling system
must be bled of air at the intervals specified in
the periodic maintenance and lubrication
chart.
EWS00380
WARNING
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.
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 43 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 soft water until it reaches the
"COLD LEVEL" mark. (See the following
section "Replenishing the coolant" for
more details.) NOTICE: Hard water or
salt water is harmful to the engine
parts. You may use boiled or distilled
54
water, if soft water is not available.
Tap water can be used temporarily in
an emergency.
1. "COLD LEVEL" mark
Bleeding the cooling system
The cooling system must be bled of air if the
coolant reservoir becomes empty, if air can be
seen in the cooling system, or if there is a
cooling system leak. Consult a Yamaha deal-
er.
ECS00500
NOTICE
Operating the engine with an improperly
bled cooling system can cause overheat-
ing and severe engine damage.
Replenishing the coolant
1. Remove the top cover. (See page 43 for
removal procedures.)
2. Remove the coolant reservoir cap, fill the
reservoir with the recommended coolant,
and then install the cap.
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