Re: catalina27-talk: Universal Model 15/18 heat exchanger

[Jenngsjohn]

I think the raw water cools the fresh water (that cools the temperature in  
the engine), similar to air cooling the coolant through the radiator in an  
automobile.
 
John Jennings  
s/v Escapade ~~~ /) ~~~
83 C-27, 5267 ~~~  ~~~
Standard/Dinette
I/B Diesel, 5411
Middle River,  MD