Yamaha VIKING 2015 Owner's Manual page 146

Engine overheating
Wait for the engine to cool before removing the radiator cap. WARNING! If the engine is not
cool when removing the radiator cap, hot fluid and steam could blow out under pressure
and burn you.
[EWB03460]
maining pressure to escape.
Wait until the
engine has cooled.
8
TIP
If it is difficult to get the recommended coolant, tap water can be used temporarily, provided that
it is changed to the recommended coolant as soon as possible.
Place a thick rag over the cap and remove the cap slowly to allow any re-
Check the coolant level in the
coolant reservoir and/or radiator.
Level is low, check the
cooling system for leakage.
Restart the engine. If the engine overheats again, ask a
Level is OK.
Yamaha dealer to inspect and/or repair the cooling system.
8-56
Ask a Yamaha dealer to inspect
Leakage.
and repair the cooling system.
No
Add coolant. (See TIP.)
leakage.