In addition to the serial number, the horsepower of the engine in question must be known to determine the year model of a Mercury outboard.
hat year is this Mercury outboard 7.5h.p seal #704818
1974
Two things are needed to determine the age of a Mercury outboard, the serial number, and the horsepower rating.
In order to determine the age of a Mercury outboard, in addition to the the serial number, the horsepower is needed.
There is a serial no 5965263 for a 1982 Mercury 9.8 There is a serial no 5965263 for a 1982 Mercury 9.8
11.92
There are two items needed to determine the age of a Mercury outboard, the serial number, and the horsepower rating.
A 9.8 hp Mercury outboard, serial number 4020915, would be a 1974 year model.
Your 4 hp Mercury outboard, serial number 2779869 is a 1970 year model.
A 9.8hp Mercury outboard, serial number 2143520 would be a 1967 year model.
A 25hp Mercury outboard, serial number OG027076 is a 1994 year model.