4" Merc crank & rods

[flatheadfool]

I'm trying to figure out what a 4" stroke crank 2" rod journel
crank and matching set of rods are worth . Rods are standard and mains
are -.020. Both are in good shape for reconditioning .

[Flathead]

Are you sure it hasn't been stroked to 4 1/8 with those 2" rod journals? Which rods do you have?

[34PKUP]

As stated if it does have a 4 inch stroke with a 2 inch rod journal it is most likely stroked.
As I recall all stock cranks with 2 inch rod journals were 3-3/4" stroke (including Mercury)

[Lawrie]

It may be a scat or an Eagle 4 in one with the 2 in rods,
Lawrie

[JWL]

Maybe there are 2 different cranks? One a 4" stroke and a different one with 2" journals??

[Ol' Ron]

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In the past we would turn down a Merc crank to 1.998 to save it and use 91 or 21A rods. However the saay should be re-balanced. Some where in my stash I have a bad Merc crank and if it passes Magnafluxing , that's what I'd do. But I din't need it yet???

[flatheadfool]

I'll get some picts posted. Def. a old Ford crank

[51 MERC-CT]

Originally Posted by flatheadfool

I'll get some picts posted. Def. a old Ford crank

Pictures may or may not help but why not re-measure the stroke just to confirm your initial findings?

[philipswanson]

Originally Posted by flatheadfool

I'm trying to figure out what a 4" stroke crank 2" rod journel
crank and matching set of rods are worth . Rods are standard and mains
are -.020. Both are in good shape for reconditioning .

I sold a std. Merc crank a couple of years age for $50 at a parts meet.

[40 Deluxe]

Originally Posted by philipswanson

I sold a std. Merc crank a couple of years age for $50 at a parts meet.

Somebody made at least a $300 profit off you!

[flatheadfool]

Hi all, The rods have B38 marked on 1 side and 91 over H4 on the other
side of beam. The #2313 is on a counterweight. It does not appear
to be offset ground . I would measure the stroke but it's not easy
without a block. I guess I'll put it on the lathe . The mains are only .010 under.
Maybe it is a 3 3/4 crank ? Thanks for reply's''''''''''''''''''' RJ

[flatheadfool]

Measured stroke . It is 4" .SO ,, What are the crank and rods worth ????

[Bored&Stroked]

Originally Posted by flatheadfool

Hi all, The rods have B38 marked on 1 side and 91 over H4 on the other
side of beam. The #2313 is on a counterweight. It does not appear
to be offset ground . I would measure the stroke but it's not easy
without a block. I guess I'll put it on the lathe . The mains are only .010 under.
Maybe it is a 3 3/4 crank ? Thanks for reply's''''''''''''''''''' RJ

Measure the width of one of the big counterweights and what size are the rod journal oil clean-out holes?

Here is a link to some information that should help:

http://myflatheadford.com/identify-4...ry-crankshaft/

[flatheadfool]

Thanks, Big help.