A 1981 model, 140 hp Johnson outboard requires a 50:1 ratio.
1 quart of outboard / 2 cycle motor oil to 6 gallons of gas
Your 1958 Johnson uses a 24 to 1 mixture.
I have a 1972 85esl72 Johnson outboard motor and I use a 50:1 ratio.
50:1 is the correct mixture for a 1992 Johnson 60 hp outboard.
50:1
32:1
50 to 1
50-1
50:1
50:1 ratio ie. 100ml oil to 5l fuel
1990
32:1