"Rick & Linda Bernard" wrote in message
...
Anyone tried it? I have a question in on their web site but they don't
seem
to want to answer it.

Let me poise the question to the group -

I have a 50 hp fresh water cooled diesel that is beginning to run hot.
The
engine temp seems to be creeping up to 200 F at cruising speed with salt
water temps in the 60's. Used to run at 180-185 with water temps of 80+.
Water flow out the back seems less then expected and has been going down
over the years even with a new raw water impeller-pump.

I had pretty similar symptoms with my last diesel. Just a slow increase in
temperatures. I used a tiny sample bottle (about 100ml or less) of Marsolve
on just the heat exchanger. I let it soak for at least 1/2 hour or more.
Cured the problem.

I agree with the other posters that suggested checking for blockages caused
by impeller vanes or crud in the heat exchanger, but a slow increase in
temperature suggests gradual scaling of the heat exchanger.


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)