To determine the age of a Mercury outboard, you will need to know the engine serial number, and the horsepower rating.
A 9.9hp Mercury outboard, serial number OB120743, is a 1987 year model.
A 35hp Mercury outboard, serial number A184641, 1985 year model.
A 9.9hp Mercury outboard, serial number OD127373, is a late 1992 year model.
A 20 hp Mercury outboard, serial number OG156340, is a 1995 year model.
Two items are required to determine the year model of a Mercury outboard, the serial number, and the horsepower rating.
A 175 hp Mercury outboard, serial number 5921200, would be a 1981 year model.
A 18hp Mercury outboard, serial number 5955388 is a 1982 year model.
A 9.9 hp Mercury outboard, serial number OB235459 is a 1988 model.
A 35 hp Mercury outboard, serial number 1763352, would be a 1965 year model.
In addition to the serial number, to determine the year model of a Mercury outboard, the horsepower rating is needed.
A 9.8 hp Mercury outboard, serial number 2389278, is a 1968 year model.
A 9.9 hp Mercury, serial number OG031959, is a 1995 year model outboard.