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1994 390CPMY water heater replacement
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Re: 1994 390CPMY water heater replacement
- tonyiiiafl
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Re: 1994 390CPMY water heater replacement
- bud37
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Re: 1994 390CPMY water heater replacement
km1125 wrote:Source of the post I always thought it was interesting/weird that you get hotter water from the heat exchangers than from the electric elements. Makes sense though, as the engines are regulated at 160-180F, much higher than the usual water heater thermostat.
Consider where the takeoff is for the water heater....... generally engine circ pumps are pumping the coolest water/coolant thru the block then out the thermostat to the rad/heat exchanger or lake depending on the system you have. So in that case the water heater would see the cooled coolant in a closed system if taken from the pump housing.....then for sure there are losses in the hose......just a long heat exchanger to air really.....the way I see it anyhow......
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Re: 1994 390CPMY water heater replacement
If running the boat, we of course, have 160-170 degree water in the tank.
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Re: 1994 390CPMY water heater replacement
bud37 wrote:Source of the postkm1125 wrote:Source of the post I always thought it was interesting/weird that you get hotter water from the heat exchangers than from the electric elements. Makes sense though, as the engines are regulated at 160-180F, much higher than the usual water heater thermostat.
Consider where the takeoff is for the water heater....... generally engine circ pumps are pumping the coolest water/coolant thru the block then out the thermostat to the rad/heat exchanger or lake depending on the system you have. So in that case the water heater would see the cooled coolant in a closed system if taken from the pump housing.....then for sure there are losses in the hose......just a long heat exchanger to air really.....the way I see it anyhow......
I don't think that's true. The circulation pump would be pulling the coolest water from the radiator or heat exchanger, then pushing that through the system. At the end of that flow, it would go though the engine heat exchanger or water heater before getting back to the circulation pump. The aux water heater lines are actually right at the thermostat in parallel with the engine's heat exchanger when the thermostat is open, and in replace of it when the thermostat is closed. That's why, in an overheating car example, you should run the in-cabin heater on full blast to help cool the car down. That in-car heater is in the same place -hose wise- as the boat's water heater.
And yes, there will be some losses in the hose but once that hose and the compartments it runs through are warmed up, I'd bet those losses wouldn't amount to too much because you have a constant supply of very hot water running through them.
- bud37
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Re: 1994 390CPMY water heater replacement
bud37 wrote:Source of the post So in that case the water heater would see the cooled coolant in a closed system if taken from the pump housing
That is why I worded it that way, yes you are absolutely correct, if the lines are taken from the hot engine discharge they will be as you say.......very poor choice of wording on my part...
You just never know who has done what with those engines...
- tonyiiiafl
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Re: 1994 390CPMY water heater replacement
- tonyiiiafl
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Re: 1994 390CPMY water heater replacement
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- CYO Supporter
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Re: 1994 390CPMY water heater replacement
Have a great trip Tony. Pics please!
- tonyiiiafl
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Re: 1994 390CPMY water heater replacement
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