Mercruiser 5.7 MPI Horizon Winterization
Well it's getting to be about time to winterize the new boat. This is my first closed cooling system boat. I plan on testing the antifreeze in the engine to make sure it will hold up to the winter temperature. I have heard that there is an air system on the motor that I can use to drain the engine of water. Then can I just run antifreeze through the outdrive to winterize the motor? Any advice would be appreciated!