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Hi guys.. I have ran into a snag and need a little info on 251 crankshafts. I found a replacement crank for my engine out of a 251 marine engine. The marine engines had all gear driven cam shafts and oil coolers off the end of the crankshaft. Anyway, the front noze shaft on the Marine engine...

Re: RE: 251 marine engine I have and will continue to ask some of the old boat guys. The problem is they used these in Chris Chrafts and that crowd around here tend to be a little ... well... stuck up and of a higher pay grade. They dont like to talk to us redneck OD heads.. But I will keep trying.

The crank should turn either way.. The gears driving everything else might be reverse..

I never thought of the cam torc curve.. I do know they are re-balanced built for sustained RPM's.. Its a real neat set up.. All gear driven and was mounted in the boat backwards... I sure hope this crank will work and has no cracks. All the bearings are still standard so I dont think it has ever...

Well I stumbled accross some chrystler 251 marine flatheads. It appears to be the same block as a civi 251 with some extra goop. Will the crank work in a Canadian 251? I will also have some of the marine stuff for sale on ebay in the coming months. If anyone is rebuilding one for a boat let me...