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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 ]
The firm immediately began to develop its first outboard motor, a one-cylinder, 1.5 hp (1.1 kW) model, which became an instant success upon its introduction in 1909. [3] Because of Bessie's poor health, the Evinrudes sold their company in 1913, and Ole agreed to not re-enter the outboard motor business for five years.
In 2012, Lehr inc. introduced some small (<5 hp) outboards based on modified Chinese petrol engines to run on propane gas. Tohatsu currently also produces propane powered models, all rated 5 hp. Conversion of larger outboards to run on Liquified petroleum gas is considered unusual and exotic although some hobbyists continue to experiment.
Headquarters A Mercury 50 HP outboard motor circa 1980 Six cylinder two-stroke engine in 1984. Mercury Marine is a marine engine division of Brunswick Corporation headquartered in Fond du Lac, Wisconsin.
After manufacturing their first outboard motor in 1965, the 5.5 horsepower D55, Suzuki continued producing outboard motors. in 1987, the two-stroke, V6 DT200 Exante engine won the company’s first accolade: the "Most Innovative Products" award from the National Marine Manufacturers Association (NMMA) of the U.S. [6]
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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.
In this design, motor oil is blended into the fuel to lubricate the cylinder and reciprocating assembly, in ratios such as 25:1, 40:1, or 50:1 fuel-to-oil. This two-stroke oil is burned during combustion and contributes to emissions and inefficiency. [ 10 ]