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Old 05-25-2013
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Re: Diameter of Diesel Water Exhaust Pipe

Hello,

I'm confused. Is your engine fresh water cooled (has coolant) or raw / sea water cooled? If it is raw water cooled I don't know if it will get got enough to heat the water tank. Also, if your boat is in salt water i don't believe the water heater is designed for salt water.

If the engine is fresh water cooled then the water heater gets connected to the engine coolant, not the sea water / raw water pump. The connection should be:
engine block water OUTPUT to water heater input, water heater output to engine heat exchanger input, engine heat exchanger output to engine block input.

Good luck,
Barry


Quote:
Originally Posted by vtsailguy View Post
Wonder if someone can help me here....

I am connecting up a hot water heater. The current tubing from the diesel for the water exhaust is 3/4". I have a bunch of 1/2" tube lying around to run to the heater's exchanger.

Does it matter to the engine to step down to a smaller size tube, or is it important to keep to the 3/4" (i.e. have to by more tubing).
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Barry Lenoble
Deep Blue C, 2002 C&C 110
Mt. Sinai, NY

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