Originally it called for 25 to 1 30wt non detergent motor oil. DON'T mix modern 2 stroke oil at that ratio or it will smoke like crazy and foul the plugs. I run mine at 40 to 1 with no problems.
50 to1
The fuel to oil ratio for a 1962 model Johnson outboard is 24:1.
How Old? I have a 1980 2HP Johnson. The Ratio is 50:1
40:1
50:1
I wish I knew!
My twin cylinder 1965 Johnson 3hp uses a 50:1 gas:oil ratio.
50:1
50:1
All Johnson and Evinrude outboards manufactured prior to 1965 require a 24:1 ratio. The model CD-15 has always been one of my personal favorites, take care of it, and enjoy it.
50 to 1
A 1981 model, 140 hp Johnson outboard requires a 50:1 ratio.