50:1
1966
A 1960 model, 18 hp Evinrude outboard requires a 24:1 ratio.
An Evinrude outboard, model number E185TXCRS would be a 1984 model, 185 hp.
An 18 hp Evinrude outboard, model 18202 would be a 1972 year model.
A 15 hp Evinrude outboard, model number E15BACEC, would be a 1989 year model.
A 15 hp Evinrude outboard, model number 154040 would be a 1974 year model.
Model number 6303, would be a 1973 year model, 6hp Evinrude outboard.
Model number E25TELCSA, is a tiller electric start, 20" shaft, 1980 year model, 25hp Evinrude outboard.
The 1971 model, 18 hp Evinrude outboard requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
The oil / fuel ratio for the 1977 model, 85 hp Evinrude outboard, is 50:1, roughly one pint of 2 cycle oil, to six gallons of fuel.
84
In order to determine the year model for a Evinrude, or Johnson outboard, the engine model number is used.