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    1965 18HP Johnson outboard

    Trying to tune this motor for top end performace and have some questions,set the points at .020, used Sea Foam in the carb.Checked the plugs found RJ19LM in the motor, one dealer say's they are correct another one say's no should have J8C, which one is correct,put a photo-tach and timing light...
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    1965 Vintage Johnson outboards

    I had asked in my last message about increaseing the h.p. on my 16hp motor, I know that Johnson made 18,20,and 25hp motors that year, what was the basic difference, from the outside they all look the same and if the bore and stroke is the same on these engines then it must be caburetor,RPM,or...
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    1965 Johnson 16 HP outboard

    Can this engine's horsepower be increased by increaseing the size of the carb. main jet and running the engine at 5500 RPM, or is this to good to be true. EZ
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