What year is my Mercruiser 470

I'm trying to find out wha

I'm trying to find out what year my 470 is so that I can purchase the correct overhaul parts. It appears there are some differences.
I found the following info:
470 2bbl. Mercury 224 4 1976-1979 4208730-5520114
470 2bbl. Mercury 224 4 1980-1982 5520115-6218036
470 2bbl. Mercury 224 4 1983-1984 6218037-6916778

However these serial numbers dont match mine. I have two blocks and both have an Alpha character.
A365436 and
B458977

So can anyone tell me the year of these engines?
And is there a description somewhere of the difference between years?

Thanks...Paul

You can call any Mercruiser de

You can call any Mercruiser dealer who's willing to look it up or Mercruiser will tell you.

"Ronald Paul Shadwick:

The

"Ronald Paul Shadwick:

The numbers you provided were checked with Mercruiser parts express search engine and both refer to the following:

MERCRUISER (87 SALES CODE W/ 86 HP TITLE)
Serial Number: 0B458977 Model Number: 01703347

http://www.mercurypartsexpress.com/PartsExpress/ProductSelection/ServiceParts/sp home.asp?CID=

Guy"

Much appreciated...Paul

Much appreciated...Paul

I am not sure what state you a

I am not sure what state you are in . I live in md here is a number for a marine place that will ans your questions.
Cobe Marine 410-255-9488