Does nayone have a Yanmar 2QM15 Users Manual ?
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I have a manual. I can go to the boat tonight and post something tomorrow. However I don't remember anything in it on the water heater.
Yanmar Manual
http://www.pdfgeni.com/book/Yanmar-2qm15-manual-pdf.html
Here is a link to a Yanmar Manual you can download free as a PDF.
http://www.pdfgeni.com/book/Yanmar-2qm15-manual-pdf.html
Here is a link to a Yanmar Manual you can download free as a PDF.
Hi:
I've got a 2QM20. The manual is on the boat, but I don't recall any detail about H2O water heater hookup. I have at home a Yanmar GM series manual. (A PO didn't know what engine he had and bought the wrong manual ... confused me for about 15 minutes when I bought the boat, when the diagrams in the manual didn't quite match up with the actual engine!) The GM series were made about the same time as the QM's. I just looked and didn't see anything about plumbing the engine's cooling system to a H2O heater.
However from my Seloc manual which is for both QM's and GM's is a drawing of the general setup for a H2O heater. See pic attached. The Seloc manual does not expand any further than this drawing.
Does your 2QM15 have a contained cooling system (anti-freeze) or is it seawater cooled? If the latter, there was a discussion several months ago about adding a H2O heater to seawater cooled engines. You might want to do a search.
I've got a 2QM20. The manual is on the boat, but I don't recall any detail about H2O water heater hookup. I have at home a Yanmar GM series manual. (A PO didn't know what engine he had and bought the wrong manual ... confused me for about 15 minutes when I bought the boat, when the diagrams in the manual didn't quite match up with the actual engine!) The GM series were made about the same time as the QM's. I just looked and didn't see anything about plumbing the engine's cooling system to a H2O heater.
However from my Seloc manual which is for both QM's and GM's is a drawing of the general setup for a H2O heater. See pic attached. The Seloc manual does not expand any further than this drawing.
Does your 2QM15 have a contained cooling system (anti-freeze) or is it seawater cooled? If the latter, there was a discussion several months ago about adding a H2O heater to seawater cooled engines. You might want to do a search.
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not trying to rain on your parade here but if you dont have a closed cooling system the hot water heater may not get the water hot enough ....i am in the hunt for a gm20 with a heat exchanger so i can use the engine to heat the water when away from shore.......i have a 15qm in my boat now and am going to upgrade the system to a stronger engine so i can run a bigger alt and also have enough power to battle the tides and river currents.......if you find that the open cooling system gets the water hot enough i would like to hear some feed back on that plz...
regards
woody
regards
woody
Woody is correct. The raw water cooled engines do not run at a high enough temp to produce HOT water. I would suspect that you are only going to get something like 120-140 deg at the most.
The alternative is to plumb in a heat exchanger which many owners of these QM motors did. I do not know if you can find one to fit any longer.
The alternative is to plumb in a heat exchanger which many owners of these QM motors did. I do not know if you can find one to fit any longer.
there is a company down in fl that will make the exchanger for you that they used to make 30 yrs ago for there upgrade kit ...its runs some where between $375.00 to $425.00 i think ...and you have to add a jabsco circulating pump as well .......i dont have the company name in front of me at this time but i willl look it up later this week end ....i also have the instructions for this kit .....the pump is expensive as well .......i find it more economical to up grade the engine rather than upgrade the old qm15 even though it is still a good engine .......
regards
woody
I have a 2QM15 manual and I don't have a 2QM15 engine. I have a 2QM20 engine and I need a manual for that.
You don't need a manual to install a water heater. All you need is the instructions that people are providing here. You do need a manual for your engine though.
I have a sea water cooled engine right now. I plan to install a 110V water heater with a heat exchanger also for when I get the 2QM installed.
I don't care that much about hot water, I want the 20hp so I can waterski. Motoring is slow going when the wind picks up.
You don't need a manual to install a water heater. All you need is the instructions that people are providing here. You do need a manual for your engine though.
I have a sea water cooled engine right now. I plan to install a 110V water heater with a heat exchanger also for when I get the 2QM installed.
I don't care that much about hot water, I want the 20hp so I can waterski. Motoring is slow going when the wind picks up.
the name of the company is S E N-D U R E in Fort Lauderdale, FL
phone # 954 973 1260 and you can ask for Rich...
the jabsco pump is a 1/4" model #2760....he will be glad to send you the directions .....you will have to fab some brackets to mount the pump and get some new hoses as well .....hope this helps...
regards
woody
Re converting raw water to self contained (anti-freeze cooling). My 2QM20 was converted at some point by the addition of the external jabsco pump and external Sendure heat exchanger as per Woodster's info (but I don't have the part numbers at hand as he did).
One thing though is that the housing on the engine is only for the ~140F thermostat which is for the seawater system. The ~160-170 thermostat for engines designed for self contained anti-freeze systems will not fit in this housing. I do not think that there is a conversion for this. So unless the engine's 140F thermostat can be bypassed to an external 160-170 thermostat, a water heater won't get to very high temps. My coolant just gets very warm not quite hot to the touch at idle or slow motoring. From a hot water tank warmed by the QM series raw water conversion, you most likely will get warm water. Not hot. Just my observation/opinion.
One thing though is that the housing on the engine is only for the ~140F thermostat which is for the seawater system. The ~160-170 thermostat for engines designed for self contained anti-freeze systems will not fit in this housing. I do not think that there is a conversion for this. So unless the engine's 140F thermostat can be bypassed to an external 160-170 thermostat, a water heater won't get to very high temps. My coolant just gets very warm not quite hot to the touch at idle or slow motoring. From a hot water tank warmed by the QM series raw water conversion, you most likely will get warm water. Not hot. Just my observation/opinion.
Looking for 2QM15 manual.
Well we don't know if Mr. Spadafora really wants to convert to fresh water cooling. In the event that he does here are some pictures that might help. I wish I had one from the back of the 2QM20. I cannot remember the connection points to the water heater. The waterpump was mounted on a piece of 1" angle, about 4" long, that was bolted to the engine block.
I am not sure how the thermostat problem was resolved when I had that engine. But I always had hot water. You are all correct, without a heat exchanger you will not get hot water out of that tank.
Well we don't know if Mr. Spadafora really wants to convert to fresh water cooling. In the event that he does here are some pictures that might help. I wish I had one from the back of the 2QM20. I cannot remember the connection points to the water heater. The waterpump was mounted on a piece of 1" angle, about 4" long, that was bolted to the engine block.
I am not sure how the thermostat problem was resolved when I had that engine. But I always had hot water. You are all correct, without a heat exchanger you will not get hot water out of that tank.
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Ed, what model is in the picture? Is that a 2QM15 or 2QM20? My grandfather is rebuilding one and is trying to identify the model (data plate is missing). The picture is the same model as my grandfather's.
Thanks,
John
i found sunshower makes water hotter than does any yanmar i have ever met--the yanmars run colder than anything i have used.....i took out my water heater as they are a source of leaking in the future----goood luck-----
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