I am installing a Closed Cooling system on my boat. The engine has been in fresh water for 23 years (300 hours), and this past summer (july and aug) was in salt water (50 hours). Thats it. I bought a Closed Cooling system this week and was wondering what should I do to flush my motor out before installing this system? I heard it is bad to have antifreeze mix with salt. Anything I should do other than run freshwater through the motor before installation. Please help!

Thanks,
Steve.

prestone superflush, then baking soda and water to nutralize acids and salt residue. I have closed cooling on my engine. did same thing ran salt then installed closed cooling.

Was it worth it for you?

23 year old boat and dumping money into a cooling system. IDK??

Got the system for a great price. I am going to be putting a lot of hours on this boat, (50-80 hours a summer) and in the salt water. I want to make sure the motor runs mint.

Steve
With the amount of time you and Chris run your boats,I think it's a great idea.Did you find the system used? How is the exhaust upgrade going? I should be out there week after mother's day.

Jeff THANK YOU! Its awesome. I was done with the system (came out awesome, I really cant thank you enough) but then I got a closed cooling system for short money (new in the box the guy just didnt feel like putting it in). So now this weekend I will put that in and a few other things and the boat is in the water. I think its a great idea considering what salt does to the engines. I will keep you posted, even with pictures.

Below is the picture of it.