Credit for this information goes to Markus Ritter owner of a Mariner 36 s/v Sankaty check out his website at http://sankaty.homestead.com
Original Front view. with five inch long 1/2" ID Thermostat by pass hose
Existing barbs are good enough for 1/2 inch ID hose. Original Barbs in place
I ended up using a 1/2" hose on the existing barbs. The 1/2 " hose runs about three feet back to the existing 5/8" heater hoses. At that point there is a 1/2" to 5/8" plastic adaptor that makes the conversion as shown.
Plan view w/o brass elbow
I have found some brass 90 deg elbows that may fit into the pipe thread of the engine so that the “From WH” line can stay below the “to WH” line to make it easier to fill the water heater when changing coolant. I may install them next winter, but so far everything is working OK and our continuous speed is 15% faster as we are no longer cooling system limited. Click here for curves showing temperature after one hour runs a various speeds. Check out Racor’s comments on blow by.
Front View w/o Brass Elbow
There is a manufacturer that specializes in marine heaters I ordered their H-406, H-417, and H-407 3/8″ Male Pipe Thread to 5/8″ inch hose adaptors, but I have not installed them yet.
Heater Craft’s, Dan Shull at 208-687-4400. or e-mail him by clicking here
Westerbeke has the straight adaptor P/N 302391.
I have not been able to get the old barbs out yet. The system is working fine now so I may never add the brass elbows. It is difficult to get the air out of the water heater lines, and I expect that the […]
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