I Have a 25 Hp Mercury outboard Serial no OC141552 could you tell me the year and where to find parts

Question edited for a lot more clarity.

They are normally listed by HP.

https://www.google.com/search?q=mercury+outboard+serial+number+lookup

..

Product Line Year H.P. Model Number Model Description MERCURY 1978 115 1115628 MERC 115

Product Line Year H.P. Model Number Model Description MERCURY 1983 25 1025523 MERC 25

Would have been helpful to know the horsepower. But here are charts you may be able to use to figure it out:


http://www.iboats.com/basics/mercury.html

MERCURY OUTBOARD MODEL YEAR GUIDE 15 25 HP Mastertech Marine

Maybe 1977.


MERCURY OUTBOARD MODEL YEAR GUIDE 15 25 HP Mastertech Marine

It's a 25XD from 1986

What year is my Kiekhefer Mercury Outboard SN 389664, Mdl-KF-7

call mercury outboard they can tell you the answer to your question

I was able to find the following information regarding 6 HP manufactured by Mercury. You can find more information on the boating forums.

http://forums.iboats.com/mercury-mariner-outboards-25/

HP

Cyl.

Beginning Serial #

Year

6214086111961621485612196262155144319636216075131964621745521196562195827819666220961711967622284857196862A910596198662B114231198762B233200198862B3855001989

pinched rom another website:
Every Mercury outboard has a serial number label located on the transom bracket area of the engine. The latest serial number labels display a 2-digit number in a box at the lower right portion of the label. These digits coincide with the last two digits of the year in which the outboard was manufactured. For example, if an outboard was manufactured in 2010, the number "10" would appear in the box at the lower right portion of the label.