5-7
ESU05410
Knock control system “KCS” indicator light
This snowmobile is equipped with a system which
detects engine knocking in order to protect the engine
from damage.
The knock control system “KCS” indicator light
1
comes
on if knocking is detected, then flashes if the knocking
increases.
After the knocking has stopped, the knock control system
“KCS” indicator light goes off.
CAUTION:
@
●
If the knock control system “KCS” indicator light
comes on, the fuel tank may not have been filled
with the recommended fuel. Reduce the engine
speed to 6,000 r/min or less. As soon as possible,
stop the engine, let it cool sufficiently, and then
drain the fuel and refuel with the recommended
fuel.
●
If the knock control system “KCS” indicator light
is flashing, have a Yamaha dealer inspect the
snowmobile as soon as possible.
@
NOTE:
@
To help prevent knocking, use premium unleaded gaso-
line only. (See pages 6-1–6-2 for more details.)
@
ESU04180
Coolant temperature warning indicator
If the engine overheats, the coolant temperature warning
indicator
1
and the warning light
2
come on. When this
occurs, stop the engine immediately and allow the
engine to cool down, and then check the coolant level in
the coolant reservoir. (See page 6-4.)
CAUTION:
@
Do not operate the engine if it overheats.
@
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