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post #4 of Old 10-03-2012
MarkSF
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Re: High Priced "Marine" Thermostats

Quote:
Originally Posted by mitiempo View Post
If your engine is fresh water cooled - it has a heat exchanger - you want a 180 degree thermostat. 140 degree thermostats are used in raw water cooled engines so salt deposits do not build up. 180 degrees is better but just won't work on a raw water cooled engine.
The 5411 is raw water cooled, while the large ones have a heat exchanger. 140F is the correct thermostat for the 5411.

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