Classic Mercury 40-HP Outboard Engine; Location of Thermostat

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Author Topic:   Classic Mercury 40-HP Outboard Engine; Location of Thermostat

briang55 posted 06-16-2014 08:19 PM ET (US)
On a 40-HP Mercury classic where is the thermostat located[?]
contender posted 06-17-2014 09:31 PM ET (US)
I'm not a Mercury guy but I would have to say somewhere on the head, probably one wire going to it.
sosmerc posted 06-19-2014 11:16 PM ET (US)
Mercury never used a thermostat on any of the classic old two-stroke four-cylinder engines or six-cylinder engines. The first Mercury engines to use thermostats were the two-cylinder 402 and later 40's. The three-cylinder 65 and 70-HP and later propshaft-rated 50 and 60-HP three-cylinder engines also had thermostats.

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Author	Topic: Classic Mercury 40-HP Outboard Engine; Location of Thermostat
briang55	posted 06-16-2014 08:19 PM ET (US) On a 40-HP Mercury classic where is the thermostat located[?]
contender	posted 06-17-2014 09:31 PM ET (US) I'm not a Mercury guy but I would have to say somewhere on the head, probably one wire going to it.
sosmerc	posted 06-19-2014 11:16 PM ET (US) Mercury never used a thermostat on any of the classic old two-stroke four-cylinder engines or six-cylinder engines. The first Mercury engines to use thermostats were the two-cylinder 402 and later 40's. The three-cylinder 65 and 70-HP and later propshaft-rated 50 and 60-HP three-cylinder engines also had thermostats.