A 40 hp Mercury outboard, serial number 5897057, would have been manufactured in late 1981.
Mercury outboard, 8hp, sn A721731 manufactured in 1987.
The serial number OC111736 for a Mercury 15hp outboard motor indicates that it was manufactured in 1981. Mercury outboard motors typically use a coding system where the first letter represents the year of manufacture, and "O" corresponds to 1981 in this case. For precise confirmation, you can also contact a Mercury dealer or refer to an official Mercury outboard serial number guide.
The "OC" model 75 hp Mercury outboards were manufactured in 1990.
To determine the year of a Mercury outboard motor with the Canadian serial number 7140019, you can refer to Mercury's serial number lookup charts, which typically provide the manufacturing year based on the serial number. For this specific serial number, it generally indicates that the outboard was manufactured in 1981. However, for the most accurate identification, it's always advisable to consult an official Mercury dealer or service manual.
The 20HP Mercury outboard with serial number 9137627 was made in 1979.
The "OC" model 75 hp Mercury outboards were manufactured in 1990.
A 9.8 hp Mercury outboard, serial number 3264445, would be a 1972 year model.
The serial number 9137327 for a 20 HP Mercury Outboard is not not listed in the Mercury Marine parts catalog.
From what I can find in serial number tables, your outboard is made in 1975. My refernce: http://www.marinshopen.se/Hj%c3%a4lpmedel/Modellguide/Mercury/3565Hk/tabid/107/Default.aspx
whats the serial number
As close as I can tell, the 75 hp Mercury outboard, serial number 9436217 would have been manufactured in late 1985, since the 1986-on models, were six digit serial numbers with an "A" prefix.