andy01842
Member
I have a friend with a Fisher 30 and he would like to have some hot water on board. The problem is the engine a 3 cylinder Volvo is seawater cooled. The cooling water from the water pump runs up to a tee under the exhaust manifold (cold water into engine) and them into the bottom of the thermostat so that the water coming out of the top of the thermostat housing is nearly cold. Can a Calorifier/heat exchanger be fitted to a seawater-cooled engine like this?
Earlier this year he had over heating problems, lots of water coming out exhaust but vary hot engine new thermostat did not cure the problem, to cut a long story short the pipe cast into the front of thermostat housing that takes the bypass cold water had corrode away the price of a new housing was over £200! I made a new pipe and fitted it cost me half an hour work. The only problem now is the temperature gauge now constantly swings from hot to cold. I have read somewhere that drilling another small hole in the thermostat to allow more water to bypass the thermostat can solve this problem. Dose anyone have experience of this problem?
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Earlier this year he had over heating problems, lots of water coming out exhaust but vary hot engine new thermostat did not cure the problem, to cut a long story short the pipe cast into the front of thermostat housing that takes the bypass cold water had corrode away the price of a new housing was over £200! I made a new pipe and fitted it cost me half an hour work. The only problem now is the temperature gauge now constantly swings from hot to cold. I have read somewhere that drilling another small hole in the thermostat to allow more water to bypass the thermostat can solve this problem. Dose anyone have experience of this problem?
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