Re: Correct fuel/oil ratio for mid 1950’s Johnson

Home › Forum › Ask A Member › Correct fuel/oil ratio for mid 1950’s Johnson › Re: Correct fuel/oil ratio for mid 1950’s Johnson

July 23, 2015 at 4:02 am #20672
dshanks
Participant

    Thanks guys. 16:1 it is. Yes, the motor does smoke even at 24:1; especially while warming up. Guess I need to find a local source for biodegradable oil.

    I’m surprised that one official manual says 24:1 when the official Johnson service manual I found (published by OMC) says 16:1. Maybe OMC engineers eventually discovered less oil was really needed?

    Even at 24:1, the plugs (J6C) seem oily. Is that normal?

    Funny about the bugs. My father, the motor’s 2nd owner, was an entomologist. 😉