The 1981 model, 70 hp Evinrude, requires a 50:1 ratio, one pint of 2 cycle oil, to six gallons of fuel.
1981
E15RLCIS, is a 1981 year model, 15 hp Evinrude outboard.
50:1
apparently I have read it to be 51 lbs.
The dry weight of a 1981 Evinrude 140 is between 365 and 370lbs. depending on the model.
50:1
Between 180 to 190 lbs depending on model.
An E60ELCIA is not a Mercury. It is an Evinrude. A 1981 Evinrude. And it works just like any other 2-stroke outboard engine.
A 1981 model, 140 hp Johnson outboard requires a 50:1 ratio.
1981
A 15 hp Evinrude, model number RCIS would be a 1981 year model.
A 25 hp Mercury outboard, serial number 5848745, is a 1981 year model.