mine is 1991
Johnson outboards use the model number to determine the year model of their engines.
Johnson 4hp outboard bj4brcud
1983
1970
1992
1953
Johnson model number J70ELCSA, is a 1980 year model, 70 hp outboard.
A Johnson outboard, model number LT-10, would be a 1940 model, 5 hp motor.
the motor is a 1967 outboard
1966 20 hp.
1959
That is the model number not the serial number.