"Bruce in Alaska" wrote in message
...
In article ,
"Doug Dotson" dougdotson@NOSPAMcablespeedNOSPAMcom wrote:

My experience is that the waste water from a raw water15HP Yanmar
doesn;t have enough residual heat to make running a heater practical.
I know you can't run a water heater off of one.

Doug

Your dumping those "Paid for" BTU's overboard, and you would be very
suprised at how much heat can be moved out of that Raw water cooling
system that runs at 140F....


Bruce in alaska
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add a 2 before @

Never worked on my old boat. The 3HM30 raw water engine would never
heat the water hot enough to be useful. After replacing it with a 3GM30F I
had all the hot water I could use. Yanmar apparently told the previous owner
(my father) that using a water heater with the 3HM30 would not work and
that information was correct

Doug