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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.
A 15 hp Evinrude, model number RCIS would be a 1981 year model.
That model number would be for a 1984 10 horse evinrude. If it is a 15 horse now than someone has replaced the original powerhead.
1974
1978
Model year 1990
E15RLCIS, is a 1981 year model, 15 hp Evinrude outboard.
A 15804b is a 1978 motor.
The year model for Johnson and Evinrude outboards is determined by the "model" number, rather than the serial number.
1991 - the "EI" in the model number tells the year. E = 9 and I =1.
Its is a 1980 Model number decoder: * 15 (the HP) * 80 (the year; e.g. 1980) .G www.argoboat-ny.com