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Old 04-07-2017, 01:26 PM   #5
ak-guy
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City: Gustavus
Vessel Name: Troll Hunter
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Quote:
Originally Posted by FF View Post
Many keel coolers require a bypass thermostat in the circuit.

This is installed between the cooler intake and discharge.

On a vehicle the radiator is sized to drop the coolant temp only about 20feg F.

A keel cooler , even here in FL will have the return water far colder than the engine needs.

About $150 -$200 or so, cast iron is fine as the coolant is antifreex , so wont cause rust.

A 180F unit will probably have the engine at 180 all the time.

The internal thermostat helps the engine warm up but will not compensate for too cold return water.

This makes sense but I am having trouble actually imagining the plumbing. Would this be a normally open thermostat in the bypass?
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