On Monday, February 22, 2016 at 10:31:44 PM UTC-6, wrote:
On Mon, 22 Feb 2016 19:32:24 -0800 (PST), Tim
wrote:

My manifolds are freshwater cooled. Elbows will be the only thing needing
replacing. I have closed cooling, with heat exchanger.

Closed system is actually the best way to go. a friend of mine loves to boat about year around that is when he can, and installed a heater core in the cuddy so he can duck inside and get warmed up.

Plus, the automotive style engine can warm up to a toasty 180 degrees and run more effeciantly than thee usual 130 degree raw water system.

===

A fresh water boat can change out the thermostat for something hotter.
The only reason for 130 or 140 is to prevent salt from crystallizing in
the cooling system.

You know, I never thought of that Wayne. I always wondered why they 'for the most part' were set factory low on raw water. I think I'll re evaluate mine before something hits the lake this year. good thought, Thanks!!