That motor should be new enough to be running 50/1. Early 70's almost all motors switched to 50/1
40:1
30:1
30:1
The ratio is 40:1 on this snowmobile.
the fuel ratio for a 1977 Johnson 6hp is 50:1. The mix can be moved to 60:1 if you will be doing a lot of trolling.
The fuel to oil ratio for a 1977 model, 35 hp Johnson, is 50:1. This is roughly, one pint of 2 cycle oil, to six gallons of fuel.
50:1
The 1977 model, 20 hp Mercury outboard, requires a 50:1 fuel to oil ratio.
50/1
45 : 1
The 1977 model, 200hp Evinrude outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The 1977 model, 140 hp Evinrude outboard, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.