Hello All, I recently replaced my 14 year old water heater with the exact same size (6 gal.) unit with engine heat exchanger. I am writing to give anyone about to do this a heads-up. The new unit worked fine at the dock for the winter, but when we left to head north, everyday the reset breaker on the unit would need to be reset. Only way to get hot water on the 120 volt side is to climb into engine room, remove cover on unit & reset. After talking to the manufacturer, the told me to cut the flow on the 'in' side way back & this should solve the problem, the 180 degree water is too hot for the breaker, which is 170. I said this is a defect in the unit, as 180 is standard diesel running temp. Only valve I have on the 'in' side is right at the unit & the hose feeding is 14 years old and impossible to get at without pulling the generator, so I am afraid to use this remedy. I don't want to name the manufacturer here, so I am only posting this as a FYI. I paid about a hundred bucks extra for this feature which is useless, unless I do some major plumbing.