I am looking at putting in hot water on my Hunter 30, which currently does not have a heater. I am still using the YSE-12 and would the heat from a raw water cooled engine heat the water at all? I have read posts in the archive which say that the raw water cooled engines are not hot enough to heat water, but I am trying to find out how hot the tank would get, all I want is for it to take the chill off the water.
Hot Water!
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does on mine
My h376 heats the water from the engine and man...does it ever get hot and stays hot a long long time.
My h376 heats the water from the engine and man...does it ever get hot and stays hot a long long time.
takes a while
I recently installed a 6 gal water heater. If you start out with cold water it takes quite a while to heat the water by just running the engine. If you are just idling it takes forever. I usually try to start out with a tank of hot water before I leave shore power and then just use the engine to keep it warm.
I recently installed a 6 gal water heater. If you start out with cold water it takes quite a while to heat the water by just running the engine. If you are just idling it takes forever. I usually try to start out with a tank of hot water before I leave shore power and then just use the engine to keep it warm.
Time to convert.
You will only get lukewarm water from a raw water cooled engine. And only after a very long time. Do you even have the plumbing parts? Normally the water tank inlet comes from the heat exchanger which you do not have. So the hot water comes from: 1) shorepower, 2) a large battery bank with inverter, 3) a conversion to a heat exchanger. There is also the option of a 12V DC water tank but they are very inefficient.
You will only get lukewarm water from a raw water cooled engine. And only after a very long time. Do you even have the plumbing parts? Normally the water tank inlet comes from the heat exchanger which you do not have. So the hot water comes from: 1) shorepower, 2) a large battery bank with inverter, 3) a conversion to a heat exchanger. There is also the option of a 12V DC water tank but they are very inefficient.
put in 6 gal hot water heater
I also have 30' 1979 Hunter with YSM12 Yamar engine. HINT: To place hot water heater on shelf in the laserette- I had to take off the outside water heater jacket and fiberglass insulation and pass over engine from quarter berth. I then put it all back together again reaching down from the cockpit. Heater would not fit anywhere else. Orignal thought was to build a shelf behind quarter berth to hold it. Forget the raw water system. Ed's right- heat on 110-115v and it stays warm for a long time. Good luck
I also have 30' 1979 Hunter with YSM12 Yamar engine. HINT: To place hot water heater on shelf in the laserette- I had to take off the outside water heater jacket and fiberglass insulation and pass over engine from quarter berth. I then put it all back together again reaching down from the cockpit. Heater would not fit anywhere else. Orignal thought was to build a shelf behind quarter berth to hold it. Forget the raw water system. Ed's right- heat on 110-115v and it stays warm for a long time. Good luck
I Agree with Ed
I have a Yanmar 2QM15 on a H33 which is raw water cooled. The water heater that was on the boat when purchased was AC only. It heated the water fine at the dock, and stayed warm enough for a shower or two at the end of the day, but that's about it. The tank rusted out so I took it out. I've been trying to design and build a practical solar water heating system. I think I've got the design down, now I just have to build and test it. Perhaps I'll market it if it works. Anyway, I've been using one of those Zodi propane camping water heaters. It works great, but it worries me that it puts out dangerous exhaust fumes. I would urge against trying to make the existing raw water cooling system work. It's going to be a lot of work with little satisfaction.
I have a Yanmar 2QM15 on a H33 which is raw water cooled. The water heater that was on the boat when purchased was AC only. It heated the water fine at the dock, and stayed warm enough for a shower or two at the end of the day, but that's about it. The tank rusted out so I took it out. I've been trying to design and build a practical solar water heating system. I think I've got the design down, now I just have to build and test it. Perhaps I'll market it if it works. Anyway, I've been using one of those Zodi propane camping water heaters. It works great, but it worries me that it puts out dangerous exhaust fumes. I would urge against trying to make the existing raw water cooling system work. It's going to be a lot of work with little satisfaction.
Solar Hot Water
I have actually been toying with the solar idea, but it means running a circulation pump. Plus you need about 5-10sqr feet of space for the panel.
I have actually been toying with the solar idea, but it means running a circulation pump. Plus you need about 5-10sqr feet of space for the panel.
more of my solar plan
Although I haven't tested it yet, and therefore haven't had a chance to work out the bugs, my thoughts were to run the circulation pump off a solar power panel, and mount the whole beast high over the transom where it would double as a sunshade/rain shelter for the helmsman. I was lucky enough to find a 12 volt circulation pump on EBay that's designed to run off a solar panel. I also have the panel. It's just a matter of finding the time to put it all together and test it. Running the pump directly off the solar panel would mean that you would only have the water circulating when the sun shines. That would mean it wouldn't be circulating water unless the sun was there to heat it as well. I'll keep you posted if I get a chance to try it out.
Although I haven't tested it yet, and therefore haven't had a chance to work out the bugs, my thoughts were to run the circulation pump off a solar power panel, and mount the whole beast high over the transom where it would double as a sunshade/rain shelter for the helmsman. I was lucky enough to find a 12 volt circulation pump on EBay that's designed to run off a solar panel. I also have the panel. It's just a matter of finding the time to put it all together and test it. Running the pump directly off the solar panel would mean that you would only have the water circulating when the sun shines. That would mean it wouldn't be circulating water unless the sun was there to heat it as well. I'll keep you posted if I get a chance to try it out.
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