My 1982 H33 came with Yanmar 2gm - a raw water cooled engine. I therefore only have hot water at the dock when I am pluged in. What to do with a wife and a 16 month old daughter who require hot water when on the hook. Other than replacing the engine or adding a heat exchanger, what are my options? abf.
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Ed Schenck
Batteries plus inverter.
We can heat the water from the batteries with 300Ah and a Freedom 20 Inverter/Charger. It just depends upon how much hot water because we have to recharge with the old 2QM20. A hot water heater is a serious amps user. The 2QM is fresh-water cooled, has a heat exchanger. But the engine runs so cool that it would take forever to make the water warm enough for a good shower. Maybe OK for dishes.
We can heat the water from the batteries with 300Ah and a Freedom 20 Inverter/Charger. It just depends upon how much hot water because we have to recharge with the old 2QM20. A hot water heater is a serious amps user. The 2QM is fresh-water cooled, has a heat exchanger. But the engine runs so cool that it would take forever to make the water warm enough for a good shower. Maybe OK for dishes.
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David Foster
Solar shower bag
Ours provides enough heated water for two showers after 6 or more hours in the sun. The alternative we enjoy is to take a dip off the stern, and wash in the water. In fresh water, that does the whole trick. In salt water, you would still want a fresh water rinse. David Lady Lillie
Ours provides enough heated water for two showers after 6 or more hours in the sun. The alternative we enjoy is to take a dip off the stern, and wash in the water. In fresh water, that does the whole trick. In salt water, you would still want a fresh water rinse. David Lady Lillie
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nick maggio
engine water heater
My 290 came with a engine water heater and works great for showers I just start the motor wait a few minutes and shower away. You should look to see about installing one I have used it many times for over nighters on the hook and very rarely stay at a marina because my water heater does not have 110 electric hook up.
My 290 came with a engine water heater and works great for showers I just start the motor wait a few minutes and shower away. You should look to see about installing one I have used it many times for over nighters on the hook and very rarely stay at a marina because my water heater does not have 110 electric hook up.
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Sanders LaMont
Propane?
If you have propane aboard, check the archives for several folks who rave about the flash heaters they have installed. Instant hot water anywhere.. That's the claim.... Sanders
If you have propane aboard, check the archives for several folks who rave about the flash heaters they have installed. Instant hot water anywhere.. That's the claim.... Sanders
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Ed Allen
the options that make hot water are expensive
to ad a heat exchanger is expensve. try this its cheap and it works faily well even when the veather is cool. buy a 3 or 4 gallon yard sprayer. you know the ones with the plastic tank and a wand sprayer that you pump up with a handle on top. Paint it black and use it like a sun shower. it will work quite well. i took the wand off mine and use the handle with the shut off valve. cheap low maintance easy to clean.
to ad a heat exchanger is expensve. try this its cheap and it works faily well even when the veather is cool. buy a 3 or 4 gallon yard sprayer. you know the ones with the plastic tank and a wand sprayer that you pump up with a handle on top. Paint it black and use it like a sun shower. it will work quite well. i took the wand off mine and use the handle with the shut off valve. cheap low maintance easy to clean.
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Pat McCartin
I never tried this but...
Consider this idea... My 30 had a raw water cooled 2QM. When I instaled the water heater I bought one with fittings for the engine heat. I considered taking the hose from the thermostat housing and extending it to the water heater, then returning it to the exhaust elbow for discharge overboard. My logic seemed solid just untried. The raw cooled engines still run at 140 deg so you'ld have hot water. Your's to consider Pat
Consider this idea... My 30 had a raw water cooled 2QM. When I instaled the water heater I bought one with fittings for the engine heat. I considered taking the hose from the thermostat housing and extending it to the water heater, then returning it to the exhaust elbow for discharge overboard. My logic seemed solid just untried. The raw cooled engines still run at 140 deg so you'ld have hot water. Your's to consider Pat
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Ted
water heater
An inverter will certainly deplete your batteries. I solved the problem by installing a 2 gallon, 110 Volt water heater. I carry a 2000 watt, Honda generator and it works perfectly. Hot water in 15 minutes and 30 minutes until it automatically shuts down. The added bonus is that if I run it once per day in the AM water stays warm all day and I can run the battery charger at the same time
An inverter will certainly deplete your batteries. I solved the problem by installing a 2 gallon, 110 Volt water heater. I carry a 2000 watt, Honda generator and it works perfectly. Hot water in 15 minutes and 30 minutes until it automatically shuts down. The added bonus is that if I run it once per day in the AM water stays warm all day and I can run the battery charger at the same time
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Mitch Simmons
One more tip
We have found on our Hunter 33 "Symphony" that, if we remember to do it, turning on the hot water heater while at the dock an hour or so before leaving gives us hot water for showers and dishes for at least over night on the hook. We also used to depend 100% on a two gallon commercial Sun Shower bag before we bought Symphony. We also learned that the water in a Sun Shower can get hot enough to burn so to compensate,we always carried a gallon milk jug with a bunch of little holes bored in the lid (for a shower head). We would transfer hot water to the milk jug and cool it down with tap water. Inverting the jug would provide a comfortable spray of water. Meantime, if the sun is still out, you can continue heating more water. You will be amazed how much showering you can get done with just two or three gallons of water if you are prudent!
We have found on our Hunter 33 "Symphony" that, if we remember to do it, turning on the hot water heater while at the dock an hour or so before leaving gives us hot water for showers and dishes for at least over night on the hook. We also used to depend 100% on a two gallon commercial Sun Shower bag before we bought Symphony. We also learned that the water in a Sun Shower can get hot enough to burn so to compensate,we always carried a gallon milk jug with a bunch of little holes bored in the lid (for a shower head). We would transfer hot water to the milk jug and cool it down with tap water. Inverting the jug would provide a comfortable spray of water. Meantime, if the sun is still out, you can continue heating more water. You will be amazed how much showering you can get done with just two or three gallons of water if you are prudent!
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Jim Logan
I did what Pat McCartin said - It works!
My 2QM H33 has a 6 gallon water heater set up like Pat mentioned in his response. - it has always worked well - The water heats while you are using the engine, and it will stay warm for quiet a while - not hot enough to sterilize the dishes, but plenty hot to mix with cooler water to shower, wash up, etc. I don't know who started the idea that raw water cooled engines can't heat water, but it just isn't so, at least among the 33's that I know of. Of course I live in New Orleans, so this might not work as well in a colder climate.
My 2QM H33 has a 6 gallon water heater set up like Pat mentioned in his response. - it has always worked well - The water heats while you are using the engine, and it will stay warm for quiet a while - not hot enough to sterilize the dishes, but plenty hot to mix with cooler water to shower, wash up, etc. I don't know who started the idea that raw water cooled engines can't heat water, but it just isn't so, at least among the 33's that I know of. Of course I live in New Orleans, so this might not work as well in a colder climate.
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nick maggio
plenty hot water
My 2001 290 hot water heater has 110 heating and also has engine heating. I have never used the 110 heating at the dock but when out on the hook have used the engine to heat the water for showers many times and the water has been plenty hot. The water heater has hoses connected to the engine which heats the water in the tank.
My 2001 290 hot water heater has 110 heating and also has engine heating. I have never used the 110 heating at the dock but when out on the hook have used the engine to heat the water for showers many times and the water has been plenty hot. The water heater has hoses connected to the engine which heats the water in the tank.
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Art Childs
Paloma Propane Fired Water Heater
Hi there... I too, have a mate that likes hot water, but, like me, detests the dock. Our beloved h30 came equipped with the 2GM as well, so some creativity was required. Our solution was to install a Paloma propane fired heater in the head. It required giving up some space on the port forward bulkhead, but doesn't interfere with one's "perch" on the throne. I simply removed the plumbing for the old 110v heater, and drew the cold supply from the cold side of the vanity sink. The vanity gets hot water in about ten seconds, the galley sink in about 50 seconds. And I mean HOT. You have very good control of the temp, but I found my pressure pump cycled quite badly, so I put an accumulator in and no more problem. Big side benefit of this is all of that space where the old water heater was became home for our now required, added water tankage! Showers are a real joy now. The only downside of the system is it produces a fair bit of humidity in the boat, so we always leave the port open, and cutback on showers in the winter cruising season. Other than that, it's a keeper.
Hi there... I too, have a mate that likes hot water, but, like me, detests the dock. Our beloved h30 came equipped with the 2GM as well, so some creativity was required. Our solution was to install a Paloma propane fired heater in the head. It required giving up some space on the port forward bulkhead, but doesn't interfere with one's "perch" on the throne. I simply removed the plumbing for the old 110v heater, and drew the cold supply from the cold side of the vanity sink. The vanity gets hot water in about ten seconds, the galley sink in about 50 seconds. And I mean HOT. You have very good control of the temp, but I found my pressure pump cycled quite badly, so I put an accumulator in and no more problem. Big side benefit of this is all of that space where the old water heater was became home for our now required, added water tankage! Showers are a real joy now. The only downside of the system is it produces a fair bit of humidity in the boat, so we always leave the port open, and cutback on showers in the winter cruising season. Other than that, it's a keeper.
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