Q:

What is the gas to oil ratio for an Envirude Outboard motor? [DIFFICULT]?

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Quick Answer

The fuel to oil mixture ratio for Evinrude marine outboard motors changes depending on the specific model of engine, and its purpose. Generally, however, motors from before 1958 require a 20:1 mixture ratio, from between 1959 and 1963 a 24:1 ratio, and from then on a 50:1 mixture.

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Full Answer

New engines still in their break-in periods require a 25:1 mixture ratio, as do engines used for high-performance and racing applications. Evinrude recommends its own brand of either XD30, XD50 or XD100 grade outboard engine oils for all motors made after 1993. Only two-stroke engines require that owners mix oil into the fuel, as they do not have independent lubrication systems.

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