I bought a 2006 OPTI with a 3year warranty and purchased an additional 3 years. It covers EVERYTHING except the prop, bent shaft, and water pump. But just as in auto warranties you have to have it serviced at the required times as outlined in the owners mannual. Had a “friend” an attorney, review it and he said it is as good as gold. Also had a friend that blew a power head. Merc replaced it at no charge.Martin