In Wisconsin, your boat may be in storage for over half the year, and winterization is more important than ever due to the ethanol-based fuels of today. We know the latest techniques to keep your engine running at its peak performance. We winterize all brands of outboards as well as MerCruiser and Volvo sterndrive engines. We are so confident in our winterization process that we guarantee your engine will start in the spring! There is no need to bring your boat back in spring for a de-winterization. Simply fresh fuel, turn the key, and go!