I am going to put a Closed cooling system on my 01 Centurion Concourse. It has a V drive Mercruiser 350 (325hp). Can anyone recommend any aftermarket companies or suppliers for the parts? Thanks

I had been told that fwc should be added within 50 hours/1 year of the boat being first used existing scale/rust in the block will be forever blocking the tiny water passages in the heat exchanger. <BR> <BR>Dunno how true it is but serveral people have said the same.

you dont really need one as long as you flush the engine every use which is still reccomended even when you have a closed cooling system