1949 - 5.4 HP Evinrude Zephyr (2-stroke, 4-cylinder)
#751854174
A 25 hp Evinrude outboard, model number E25TECUR, would be a 1987 year model.
The year model of an Evinrude outboard cannot be determined from the serial number, but rather from the model number.
1992 Evinrude 15 horse manual start.
The 5602R is a 1966 Evinrude
The year model of an Evinrude outboard engine is determined from the engine "model number", rather than the serial number.
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.
Its a 1970 Evinrude Mate. 1.5 HP.
1982
With that serial number it would be a 1986.
Your motor is a 1955 model.
1986