1966 20 hp.
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
1959
That is the model number not the serial number.