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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.
Another important factor is that four-stroke engines have a different requirement for "stickiness" than do two-strokes. Since the 1980s, different types of two-stroke oil have been developed for specialized uses, such as outboard motor two-strokes, as well as the more standard auto lube (motorcycle) two-stroke oil.
Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.
The D-400 series engine or the Iron Horse engine was a light-duty two-stroke engine used for powering lawnmowers produced from the 1950s to the late 1970s. D-400 engines were single-cylinder engines designed and manufactured by the Outboard Marine Corporation (OMC; Johnson and Evinrude) for Lawn-Boy [2] and Masport. The D-400 engines displaced ...
In 1900, Evinrude co-founded the custom engine firm Clemick & Evinrude. In 1907, he invented the first practical and reliable outboard motor, which was built of steel and brass, and had a crank on the flywheel to start the two-cycle engine. In 1907 he had built his first gasoline-powered outboard motor, and two years later, Evinrude Motor ...
In 1962 Homelite introduced a four-stroke outboard a 55-horsepower (41 kW) motor, based on the four-cylinder Crosley automobile engine. This outboard was called the Bearcat and was later purchased by Fischer-Pierce, the makers of Boston Whaler, for use in their boats because of their advantages over two-stroke engines.
By 1921, Evinrude was back in business, in a venture he called the ELTO Outboard Motor Company. His new offering was the Evinrude Light Twin Outboard, a motor partly made of aluminum, reducing its weight by a third. Popular with the fishing fleets, this revolutionary engine outstripped sales of Evinrude's original outboard motor within three years.
Evinrude purchased Johnson Motor Wheel Company from a New York stock brokerage firm a year later, and in 1936 they merged with the Outboard Marine and Manufacturing Company (OMC), continuing production of Lawn-Boy mowers until 1939, when it was temporarily put on hold to manufacture outboard motors for World War II.