Yamaha GRIZZLY ULTRAMATIC YFM660FP Owner's Manual page 70

Coolant temperature warning light "
When the coolant temperature reaches a specified
level, this light comes on to warn that the coolant
temperature is too hot. If the light comes on during
operation, stop the engine as soon as it is safe to
do so and allow the engine to cool down for about
10 minutes.
CAUTION:
_
G
The engine may overheat if the ATV is
overloaded. If this happens, reduce the
load to specification.
G
After restarting, make sure that the light is
out. Continuous use while the light is on
may cause damage to the engine.
_
4-7
EBU00860
"