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Evinrude Outboard Motors was a North American company that built a major brand of two-stroke outboard motors for boats. Founded by Ole Evinrude in Milwaukee , Wisconsin in 1907, it was formerly owned by the publicly traded Outboard Marine Corporation (OMC) since 1935 but OMC filed for bankruptcy in 2000.
Ole Evinrude formed Evinrude Outboard Motors, which he sold in 1913 in order to look after his sick wife. In 1919, Evinrude invented a more efficient and lighter two-cylinder motor. Having sold his part in Clemick & Evinrude, he founded ELTO or the Elto Outboard Motor Company. (ELTO was an acronym for "Evinrude Light Twin Outboard".)
Mercury Marine, Mercury Racing, Tohatsu, Yamaha Marine, Nissan and Evinrude each developed computer-controlled direct-injected two-stroke engines. Each brand boasts a different method of DI. Fuel economy on both direct-injected and four-stroke outboards measures from a 10 percent to 80 percent improvement compared with conventional two-strokes.
Hurricane was also advertised at 10 hp*, way below the actual horsepower developed, Mercury noted this asterisk by stating that horsepower varies with rpm; really the Hurricane could deliver up to 18 hp. Dubbed "Super" because they were superior in horsepower to other 10 hp outboards. Shortly after the introduction of the Hurricane, Mercury ...
Evinrude Outboard Motor. Early model of outboard motor for small boats, first commercially successful. 1909 Milwaukee: Wisconsin United States ASME brochure: 66: 1981 Mount Wilson Observatory, 100-inch Hooker Telescope Unique telescope mirror support and use of mercury flotation to reduce friction. 1918 Los Angeles County: California United States
A screw turning through a solid will have zero "slip"; but as a propeller screw operates in a fluid (either air or water), there will be some losses. The most efficient propellers are large-diameter, slow-turning screws, such as on large ships; the least efficient are small-diameter and fast-turning (such as on an outboard motor).