Depending on the year it may be different. I run 50:1 fuel to oil in my '75 15 hp. I think some older ones took a 24:1.
I have a 1988 evinrude 6 hp that calls for 100/1 mixture right on the cowling.
50:1
how can I get more power out of my 8hp evinrude Sell it and buy a stronger motor
50:1
For the 1995 model 40 hp Evinrude, mix at a 50:1 ratio.
50:1
Its 32:1
1:50
50:1
45 : 1
50:1 mix
The 1983 model, 15 hp Evinrude outboard, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.