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Outboard motor. An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft. As well as providing propulsion, outboards provide ...
The serial number dates it to 1954/1955. British Seagull was a British manufacturer of simple and rugged two-stroke marine outboard motors, produced from the late 1930s until the mid-1990s. Originally based in Wolverhampton, the company moved to Poole, Dorset, a centre for boating and yachting. Seagull engines were utilitarian outboards with a ...
Outboard Marine Corporation (OMC) was a maker of Evinrude, Johnson and Gale Outboard Motors, and many different brands of boats. It was a multibillion-dollar Fortune 500 corporation. [ 1 ] Evinrude began in Milwaukee, Wisconsin in 1907.
Sterndrive. The outdrive unit of a boat with sterndrive. A sterndrive or inboard/outboard drive (I/O) is a form of marine propulsion which combines inboard power with outboard drive. The engine sits just forward of the transom while the drive unit (outdrive or drive leg) lies outside the hull.
Actual efficiency can be lower or higher than the engine’s average due to varying operating conditions. In the case of a production gasoline engine, the most efficient BSFC is approximately 225 g/(kW⋅h), which is equivalent to a thermodynamic efficiency of 36%. An iso-BSFC map (fuel island plot) of a diesel engine is shown.
Sturtevant, Wisconsin, United States & Montreal, Quebec, Canada. 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 ...
A dry-sump system is a method to manage the lubricating motor oil in four-stroke and large two-stroke piston driven internal combustion engines. The dry-sump system uses two or more oil pumps and a separate oil reservoir, as opposed to a conventional wet-sump system, which uses only the main sump (U.S.: oil pan) below the engine and a single pump.
Viscosity index. The viscosity index (VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The lower the VI, the more the viscosity is affected by changes in temperature.