Merc used the 351W from 1975-1977. The 4bbl was 255hp. The 233hp was a 2bbl.
I've owned a 233 since it was new in 1976 and done nothing except routine
maintainence. A nice motor.
In 1978 Merc went all GM.
Sam

"Jim" wrote in message
m...
I just bought an '86 19' Stingray with a Ford 351W 4bbl motor and a
Mercruiser stern drive. Anyone know what the advertised HP for this
motor was? Anything to watch out for?

Thanks