Don't know anything about omc's, just small blocks and mercs. I will say
that the extra hp is not that low down in the rpm band so if the boat is not
very heavy the difference to the outdrive may not be that much. I would not
worry about it. It's not like you're switching to a big block.

"NoOne N Particular" wrote in message
.. .
But the question was "can the outdrive unit safely and reliably handle the
extra horsepower?

Wayne

"JamesgangNC" wrote in message
news
Most of the chevy small blocks are totally interchangeable until the last
few years. I think the vortex has some differences but it may have the
same external bolt patterms for accessories. It was designed for
computer efi and that will add a lot to your costs. You might also look
at the aftermarket crate motors from chevy. They can be traditionally
carburated.

"NoOne N Particular" wrote in message
om...
My boat has the OMC Cobra 5.7L 260HP engine. At least it did. It
sprung a couple of water leaks and took out the heads, manifolds, and
block. Anyway, I am finally getting around to replacing the engine and I
am considering the new 350 Vortec engine rated at 315HP. From what I
have been reading, it should bolt right up ok, and all of my old
mounting brackets should still bolt up ok, but can the outdrive unit
safely and reliably handle the extra 55 HP? And is there anything else
that might come up and bite me in the butt?

Thanks