"CT"=1983, "A"=Revision
it is a 1977 motor
1992 E30RENR 1992 Evinrude / Johnson Evinrude
1980
1978
its a 1966
1975
1949
1986
1988
Before 1980, you use the first four numbers of the Evinrude boat motor serial number to determine the year it was made. Motor serial numbers beginning with 5402 were made in 1964.
1981
5.5 HP 1964 Evinrude Fisherman 5402B-E02180