Year of a Mercury

[macojoe]

I use to own a 1990 Merc 90 hp, and they told me at the time that Merc made there motors by the lot, so my 1990 was just a year off my friends 1089 thats why they wanted the serial number when ordering parts. As they sold it as a 89,90,91 and so on till that lot was gone.
Use to be a number stamped into the freeze plugs on top of motor, you can use that to find out what year also/