1968 20hp
A 200 hp Johnson outboard, model number J200STLCDR is a 1986 year model.
A Johnson outboard, model number CD24D is a 1967 model, 6 hp engine.
1986
Johnson model number J70ELCSA, is a 1980 year model, 70 hp outboard.
A Johnson outboard engine, model number RDE19M, would be a 1957 year model, 35 hp outboard.
1965
A Johnson outboard, model number 85TL79R would be a 1979 model, 85 hp.
Model number 65ESL73R would be a 1973 model, 65 hp Johnson outboard.
1990
The year model for a Johnson outboard is determined by the "model" number, rather than the serial number.
The year model of a Johnson outboard engine is determined by "model number" rather than the serial number.
Johnson and Evinrude outboard motors use the engine "model" number to determine the year model.