if i get the number off the block,or mercruiser tag, where can i look up what it is. im looking at a used 502 carb motor, owner says that its a 420hp. but after asking around everybody says the 420 was a 454. the number givento me was taken from near the bell housing and is F224424. does that do any good to you guys?

thanks for the help

kevin

Punched that # into mercruiser epc and it said "454 efi ski engine",model #374B169GS.Hope this helps.
Jeff

hey can you punch in D602746 and see what you get?

Thanks

The 454 420hp motor was a variation of the 400 cyclone. It had gil exhausts, I think. Built late 80s/early 90s.
The base 502 comes as a 410hp version. That may be what he's referring to.
See if you can get the block code off the front of the block. That may be a better indication of what it is.
Gary

look down on the motor were the bell housing bolts to the block(left side) thats the casting #.Also it will have either 7.4 or 8.2 cast on the side of the block about where the motor mount is.

D602746 =502 magnum bravo engine.