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still smoking 11-16-2004 01:59 PM

Gen V Crankshaft
Can anyone tell me the difference in Mercruiser crank #429-811552 & 429-811551? Is one cast and one forged?

HARRISONMIRAGE 11-23-2004 11:26 PM

Re: Gen V Crankshaft
The 552 is forged from a magnum motor and the 551 is cast from a peanut port 330.If the crank is in good shape I would use it in a motor up 450 hp if balanced properly and the rpm's are kept under 5000.

HARRISONMIRAGE 11-23-2004 11:28 PM

Re: Gen V Crankshaft
Both from 7.4's

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