The 20HP Mercury outboard with serial number 9137627 was made in 1979.
1971
1970
1969.
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.
A 20 hp Mercury outboard, serial number OB152174, would be a 1987 year model.
The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
your motor is a 1975 200 20hp you can get more info here: http://www.autorepairmanuals.biz/site/573683/page/599300
96
9989819
1964 according to a Mercury Engine database athttp://www.maxrules.com/Merc_model_files/15-20.html .1964 Serial Numbers start with 1606903 and end with 1755848.Yours being 1695036 would show that it is 1964.Hope that helps.Ciao!