Thomas,
Unless you know where to get everything you might need and are a very
effective fabricator, the package is probably a good idea.
You might be able to aquire a heat exchanger that would be adequate for
about 300$us but then you sitll need a raw water pump and an head tank
(at least).

Or - Put the 500 in a CD and use that account as a down payment on the
diesel that you get as a replacement.

Matt Colie

Thomas Wentworth wrote:
If you are familiar with the Universal Atomic 4 gas engine, you know that it
originally used raw water as the cooling system.

Moyer Marine, and Indiga Electronics both sell a Heat Exchanger which can be
mounted near the engine, therefore eliminating the raw water as the cooling
system and using antifreeze as the coolant.

The Heat Exchanger units cost around $500 dollars.

I got to wondering ??? Can I or is there ,,, a place where I can buy a
Heat Exchanger that will work with the Atomic 4 but isn't so expensive?

Do motor boats use this Heat Exchange method?

It just seems like $500 dollars is expensive..

Any thoughts?