Looking for decoding 454 block stamping numbers and suffix.
 

Does any one know where to find information for decoding block stamping numbers and suffix codes om-line for GM marine 454 blocks? (Mercruiser)


Or does any one have the possibility and time to find it for me?

Most important is SN: D383143 / "T11119XF" Year? Horsepower? Internal parts? I know it's 4-bolt mains.


Also interested in "T07167XY" Year? 2 or 4-bolt mains? I know it's 340 hp and carb.

And "T08239XW" Year? 2 or 4-bolt mains? I guess it's 330 hp, I know it has carb.

Croupier 24

Thank you, but that's only parts casting numbers. As far as I can see.

problem is none of those look like mercruiser serial numbers. FWIW all 330's are 2 bolt mains with cast internals

quick search if this one D383143 is really 0D383143 that comes up as a 454 MAG. BRAVO GM 454 V-8 1988-1992

7XY is a 240 hp 2 bolt main..............no 9XW on my chart

Thank you, I read it as D383143.

Thank you, the "T07167XY" is complete and seems untouched with Mercruiser 340 Hp stickers on the valve cover.
So my best guess is that is correct. But I of course can not be 100% shure.

Looks like a D to me.