One of the big announcements at the 2007 Miami International Boat Show last week was made by Yamaha when the company premiered the largest four-stroke outboard available in the industry: a 350-hp V8. The 5.3-liter, 60-degree, dual-overhead cam, 32-valve powerplant has a 1.73:1 gear ratio, weighs 804 pounds, and can be used in single-, double-, and triple-engine configurations. It is available with 25- or 30-inch shaft lengths and with right-hand or left-hand rotation.According to Yamaha, the outboard-powered market for boats more than 26 feet LOA has grown 40 percent over the last four years and this powerplant will help fill the niche for more power.
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