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Hey mate, i have a blueband the same as yours with my number being 8022540 and it was 1973 hope that helps narrow it down.
whats the serial number
The 20HP Mercury outboard with serial number 9137627 was made in 1979.
The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
what is the year of a mercury 4 hp serial number 914805.4
Serial number 5318268, Mercury 9.8hp was built in 1979.
A 9.9 hp Mercury outboard, serial number OB235459 is a 1988 model.
A 9.9 hp Mercury outboard, serial number OG156682, would be a 1995 year model.
A 35hp Mercury outboard, serial number 6445947, would be a 1984 model.
Two items are needed to determine the age of a Mercury outboard, the serial number and the horsepower rating.
A 70 hp Mercury, serial number 6163485, is a 1982 year model.
In addition to the serial number, to determine the year model of a Mercury outboard, the horsepower rating is needed.