Anyone have an opinion on what motor this might be? It is in a repo and no real info on it. Thanks.

probably a 454 mag with some bolt on upgrades

Is there a serial number tag pop riveted on just above the starter? Post the number I might be able to help.

https://appcenter.mercurymarine.com/...Locator-mc.jsp

Mechanical fuel pump on the Raw water pump, can't see any bolts on the top center of the timing cover, newer model PS pump bracket...

I'm going to guess a Gen V or VI 454 Mag with Teague rocker covers and a Holley 750 or 850 DP on what appears to be a HP500 single plane intake manifold and a front crossover / bypass. Thunderbold IV ignition, through prop exhaust with no cutouts, stock steering and a late model trim pump.

Probably a mild Mag hopefully hooked up to a Bravo1.

Block numbers would help though.

Remember its an engine, not a motor, motors run on electricity and such. Without some detailed info or internal specs, you are asking for a WAGMAR-Wild ASS Guess Made AT Random! I try not to do to many of those, gets me in trouble!

Best Regards,
Ray @ Raylar

I on the other hand will guess until I am blue in the face as I have nowhere near half of your experience so it's all I can do!
Besides, I call them a S.W.A.G; Scientific Wild Ass Guess.
Love the 'motor' comment, I'll use that in future!!

I always remember my dad telling me that

??????? Why do they call outboards 'outboard motors'. Need a long extension cord

The guys are right about the serial # without the number or talking to the previous owner it could be anything from a blown up engine to a 572cu/in forged internal monster worth $25,000 but tthe guy ran out of money so he had to buy a little carb and stock manifolds, hooked up to a Alpha drive Oh yeah!!!

1006 286 GM are the numbers on the block in the back