Motor identifiers?

HiVoltg30

Cadet
Joined
Sep 6, 2008
Messages
9
I bought a 1984 21? Bayliner with inboard and jet.
I don?t have any paperwork besides the title and registration.
I need to replace the valve cover gaskets and stuff, but how do I go about identifying what engine it is?
What markings do I look for?
 

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HiVoltg30

Cadet
Joined
Sep 6, 2008
Messages
9
Re: Motor identifiers?

Okay, So I found the numbers cast on the block right behind the water pump; 386525 A


So that would make it an Olds 425, so now how do I determine the year? The Bayliner is a 1984.
 

Tahorover

Chief Petty Officer
Joined
Mar 7, 2011
Messages
572
Re: Motor identifiers?

So why does the year matter? The 425 was made for two years, 65-66 and there all the same. . Serial number 386525 is the very last 1965 425
 
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