Cooling System 35
Recommended coolant consists of a 50/50
mixture of antifreeze and clean water.
Never run the engine with only water. Re-
gardless of the season, the coolant should
always contain at least 40 to 60 percent
ethylene glycol (antifreeze). The antifreeze
also contains anti-corrosion agents that the
cooling system needs to stay functional.
NOTE! Do not use a winterfront for the
cooling system. See the Operator’s Manual,
Engine Start and Operation, for more infor-
mation.
NOTE! Do not mix regular antifreeze into
coolant mixed with extended life antifreeze.
The extended life properties can not be
maintained, with much reduced service in-
terval as a result.
Engine design requires the thermostat in
the engine during summer and winter. Cor-
rect engine temperature should be a
minimum of 165
F (75
C) with a properly
functioning thermostat.
WARNING
Coolant may be combustible. Coolant
leaked or spilled onto hot surfaces or
electrical components can cause a fire.
Clean up coolant spills immediately.
Do not add cold coolant to an overheated
engine because a cracked cylinder head
and/or block may result.
W2003082
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