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1979 Evinrude 70 HP outboard, cowling and air cleaner removed, exposing its shift/throttle/spark advance linkages, flywheel, and three carburetors. Ole Evinrude was born in Gjøvik, Norway on April 19, 1877; five years later, his family emigrated to the United States, settling near Cambridge, Wisconsin. Interested in mechanics from an early age ...
Basic parts of an 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.
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.
In 1958, both Johnson and Evinrude introduced 70.7 cu in (1,159 cc) V4 outboards rated at 50 hp (37 kW) and weighing 200 lb (91 kg). [24] By 1972, the same basic V4 block was producing more than double the horsepower in stock form because of the experience manufacturers gained from racing. [25]
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Originally using a very oil-rich mixture of 8:1, from 1942 models specified a 10:1 mix which remained until 1979, when a 25:1 mix was ordained. Thereafter, a 50:1 mix was tried for the introduction of the models 125 and 170, but these engines with such a lean mix proved unreliable, and British Seagull resorted to the 25:1 ratio. [5]