1994 25 HP Mercury

[topwaterpete]

I bought a used motor that was blown as a winter project***cheap***. Upon tearing it apart its pretty bad. Gonna need pistons, crank, rods. I found a used power head on the internet cheap. My question is the following: My serial number is OG219625 with a block casting of 872-9076-C9. Mine is a 1994 with electric start.
I was contemplating swaping out parts from a OD003686 with a block casting number of 872-9076-C2. That guy is telling me that motor is an 1989. According to my chart it appears to be a 1991. Will it work? What do the last two characters (C9, C2) represent. I've found several cranks as well. I have an original parts and service manual from Merc with yet diffent numbers. Mine is stamped 464-8976. I've found 464-8978A2. What's the difference. Were the part numbers superceeded?

 

[Faztbullet]

Re: 1994 25 HP Mercury

If your old block has the words MERCOSIL cast on it it can be bored oversize, if not it will need to be sleeved. The internal parts will interchange, the "A" at end of part number is a supersede for either a casting/vender or manufacturing update..