Fresh Water Cooling Kits???? Info Needed

[enginesilo]

So I am about to buy a boat that has a 3.0L Mercruiser engine (2005 with under 30 hours). Since I ride in Salt water I was wondering if a fresh water cooling kit is an ideal upgrade?

Locally I see hundreds of boats that sit in the salt water for many years and do fine, but I know how Salt water can cause havoc so I wanted to understand more about these Fresh Water, closed loop cooling systems.
I've read that they only cool the block, but not the engine manifolds and other stuff. If just the block is cooled is it that much of a benefit? I run in salt with jet ski's and other boats and flush my engines each and every single time I use them afterwards.

Can someone share some info on them, and if they are ideal?

 

[jerryjerry05]

Re: Fresh Water Cooling Kits???? Info Needed

Fresh water cooling is a good idea.There are a few manufacturers.The best are the ones recomened by Mercruiser.They are what the factory will put on them.They aren't that hard to install.
It's been a while but I think you can get one that cools the exhaust manifold too.But not the riser.That would be the one to get.
Most boats last a long time just the way they are.The part that goes bad is the manifold/riser. When you run water salt or fresh thru the motor the combination of heat and hot water make it corrode.The unit wont corrode as fast if you are in fresh water and will corrode faster if left without water in the manifold salt or fresh.Air accelerates the process. Jerry