I bought a 1999 Sea Ray Express Cruise with the Mercruiser 5.0 EFI. It has a closed cooling system. I have been working on it for a while and changed the zincs, impeller, oil, and water separator filter. Topped off the radiator fluid. I hooked the water hose up to the stern drive seems to be...
I have a new MerCruiser Plus 357 bravo 4V engine on my boat and they installed a closed cooling system with heat exchanger. My question is is that the same thing as a freshwater cooling system?