FTR..mine is fresh water cooled. You are right about sal****er cooled
engines...the HW heater wouldn't last a season without a scarificial anode.
Rick

On Tue, 30 Mar 2004 12:03:28 -0800, Steve wrote:
"JAXAshby" wrote in message
...
note that a 2GM20f is **freshwater** cooled. a raw water cooled engine
is a different breed of cat.


Most common marine water heaters are equipt with a copper or brass engine
water coil.. Therefore raw water shouldn't be circulated through it..

If a person wants to us raw water to heat domestic water, this coil
should
be replace with something in CuNi.

However, most raw water cooled engine have a low temp thermosat and the
water temp may never get over 150 degree. Not very much of a rise for
stored
hot water. A 6 gal tank wouldn't provide more than a couple showers. (the
main reason I want hot water).

Steve
s/v Good Intentions





--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/