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Old 08-08-2019, 05:10 PM   #41
GOSFAST
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Join Date: May 2010
Location: Long Island, NY
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Default Re: 1CM Merc Crank In A 40?

Quote:
Originally Posted by JSeery View Post
I happen to have a Scat 4 1/4 crank laying around, just measured it and it is 2.000". Interesting.

Just looked at their site, they have both throw sizes listed for a 4 & a 4 1/8, but not 4 1/4. Shouldn't be much of an issue to produce a larger dia throw on a 4 1/4 though.
We don't use the aftermarket (Eagle) shafts with any rod journals other than the 2.000" pieces.

I believe Eagle doesn't make any shafts with the OEM journal size (2.139") with the exception of the 4.000".

The problem I can foresee is getting the 4.250" arm in with the 2.139" journal, never tried it, but I don't think it'll go without hitting water! Could be wrong, but I don't think so?

Thanks, Gary in N.Y.

P.S. Every one of these Flathead builds really should be done on the 2.000" journal. They simply run/perform much better! The 2.000" rod journal crank would definitely be a bit lighter, this would be the right direction to go in, lighter.
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