Manufacturer of the World's Toughest Stern Drives. Konrad Marine designs and manufactures stern drives for commerical, military, recreational and high performance applications. Hudson, Wisconsin

Sterndrive Engineering (SEI) is the largest supplier of aftermarket sterndrives and our own line of outboards in the world. The company makes replacement sterndrives for MerCruiser's Alpha One and Gen II stern drives and replacement outboard lower units for Mercury, Johnson/Evinrude and Yamaha. Sterndrive Engineering's Outdrives are not remanufactured, they are entirely new. The SEI drives are made of parts that are completely compatible and interchangeable with the OEM. The drives are assembled at SEI's factory in Oldsmar, Florida.

Diesel engines for sailboats and powerboats. Also offering Stern Drives, Saildrives, Commercial Engines and Generators. Yanmar Marine is a global business dedicated to boating. Within the international YANMAR organisation, we are responsible for all leisure marine products, markets and customer service. Yanmar Marine is completely dedicated to boating. With regional headquarters in Europe, the United States, South East Asia and Japan, plus full-scale sales and service support facilities in more than 130 countries, it is dedicated to all the needs of boat builders, dealers and their customers across the world. Yanmar Marine has its headquarters in The Netherlands