Sorry, I was thinking you had fresh water cooling. The thermostat on
your raw water system is set much lower than mine (140 degrees?)
making it real hard to get the hot water tank up to the 155-160
degrees that you'd like to see in order to have hot showers the next
day. You may even want to research the thermostat a bit - I've heard
conflicting setpoints, 125 or even lower.

Of course, you could always take a dip in ocean

Roger Long wrote:
The heat exchanger in your set up is the key. Simple raw water
systems like mine run way too cool for best diesel engine operation.

As described in my response to Tom's Atomic 4 cooling question down
below, I'm looking into a keel cooler to get the operating temperature
up.

I'm glad to hear that your engine does put out that much heat. That
means that the keel cooler setup, which would cost about the same as a
big inverter, would give me hot water in more reasonable time.