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What is the oil to fuel mixture for a 1978 115 hp mercury outboard engine?


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Answered 2009-09-27 19:47:52

The 1978 model, 115 hp Mercury outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.

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You may have mistaken the '1' for a '2'..if your engine is a 4hp 2 cylinder it dates from 1978.


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