Not positive but I think its 1975
A 20 hp Mercury outboard, serial number OG156340, is a 1995 year model.
An 20 hp Mercury outboard, serial number 3143107, is a 1971 year model.
A 20 hp Mercury outboard, serial number OB268004 would be a 1988 model.
A 20 hp Mercury outboard, serial number 5334211, would be a 1979 year model.
The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
The Mercury 200 20 HP outboard motor with serial number 3667639 was manufactured in 1985. Mercury outboard serial numbers can often be used to determine the production year, and this particular number falls within that timeframe.
A 20 hp Mercury outboard, serial number OB152174, would be a 1987 year model.
whats the model number
1977 according to SELOC manual
It was made in Canada in 1988.
close to 20 years
The dry weight for a 1988 model, 20 hp Mercury outboard is 105 lbs.