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Air-Intake Silencer
Used in conjunction with the fuel intake
system is a specially designed air-intake
silencer. The purpose of the silencer is to
quiet the intake of fresh air. Since the fuel
intake system is calibrated with the air-
intake silencer in place, the engine must
never be run with the silencer removed.
Performance will not be improved if the
air-intake silencer is removed. In con-
trast, severe engine damage will occur.
CAUTION
These snowmobiles are not designed
to be operated in dusty conditions.
Operating the snowmobile in dusty
conditions will result in severe engine
damage.
Cooling System
These snowmobiles are equipped with a
closed liquid cooling system for engine
cooling. The cooling system should be
inspected daily for leakage and damage.
Also, the coolant level should be checked
daily. If leakage or damage is detected,
take the snowmobile to an authorized
Yamaha Snowmobile dealer for service.
If not under warranty, this service is at
the discretion and expense of the snow-
mobile owner.
When filling the cooling system, use an
ethylene glycol-based coolant/water mix-
ture which will satisfy the coldest antici-
pated weather conditions of your area in
accordance with the coolant manufac-
turer's recommendations.
NOTE: If operating on ice or hard-
packed snow conditions, it is recom-
mended that Ice Scratchers be
installed to reduce wear strip wear
and engine overheating.
For checking/filling cooling system, refer
to Coolant Level sub-section in the Main-
tenance section.
8
Battery
It is extremely important that the battery
be maintained at full charge at all times
and that the battery connections be clean
and tight. If charging the battery becomes
necessary, refer to Battery sub-section in
the Maintenance section.
CAUTION
Always turn the ignition switch key to
the OFF position when the snowmo-
bile is not being used. Leaving the
ignition switch in the ON position will
result in discharging the battery and
possible damage to the battery.
Jump-Starting
NOTE: Yamaha does not recom-
mend jump-starting a snowmobile
with a dead battery but rather to
remove the battery, service it, and
correctly charge it; however, in an
emergency, it may be necessary to
jump-start a snowmobile. If so, use
the following procedure to carefully
and safely complete this procedure.
CAUTION
Jump-starting the vehicle without a
battery is not advisable as it may
cause damage. Additionally, running
the unit without a battery in place or
the use of a "Jumper Pack" could
cause damage to the electrical sys-
tem.
! WARNING
Improper handling or connecting of a
battery may result in severe injury
including acid burns, electrical burns,
or blindness as a result of an explo-
sion.
Always
watches. Any time service is per-
formed on a battery, the following
must be observed: keep sparks, open
flame, cigarettes, or any other flame
away. Always wear safety glasses.
Protect skin and clothing when han-
dling a battery. When servicing a bat-
tery in an enclosed space, keep the
area well-ventilated.
NOTE: To access the battery, the
seat must be removed.
1. For the snowmobile to be jump-
started, slide any terminal boots away.
remove
rings
and
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