The 20HP Mercury outboard with serial number 9137627 was made in 1979.
1970
1971
1969.
The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
An 20 hp Mercury outboard, serial number 3143107, is a 1971 year model.
A 20 hp Mercury outboard, serial number 5334211, would be a 1979 year model.
Yes, remote steering kits were manufactured for the 20hp by Mercury Marine. Availability and part number can be found by serial number of the engine.
The serial number 3317055 for a Mercury 200 20hp outboard engine indicates that it was manufactured in 1977. Mercury typically uses a system where the first two digits of the serial number can help identify the production year. For precise confirmation, you may also check with a Mercury dealer or refer to the manufacturer’s archives.
1978
A 20 hp Mercury outboard, serial number OB152174, would be a 1987 year model.
your motor is a 1975 200 20hp you can get more info here: http://www.autorepairmanuals.biz/site/573683/page/599300