How to easily winterize an inboard boat engine with a screwdriver and RV/Marine antifreeze

If you’ve ever wanted to save some money and winterize your own inboard boat engine, it is a relatively simple process. Open the risers, exhaust manifolds, and engine block to drain trapped water. Remove a couple of hoses and pour in your antifreeze until you fill the block and antifreeze runs out of the outdrive. You are done!