The outboard-engine market was concentrated among three major manufacturers—Outboard Marine Corporation (Johnson and Evinrude), Brunswick (Mercury), and Olympus. Japanese manufacturers, such as Yamaha, were just beginning to market outboard engines in the United States. Olympus competed against Volvo, Mercury, and Chrysler in the stern-drive and sea-drive markets. Olympia boats, on the other hand, faced a much more fragmented market; over 20 national and regional manufacturers competed for the recreational-boat dollar.