Can anyone tell me if there are any visual clues to tell what series a 20B E-shaft is? I have asked a couple builders and they weren't sure how to tell the difference. Does anyone know what to look for? The only markings that I could find were a series of 3 letter codes stamped on the shaft. Most of them said "B C C" or "C C C"

Thank You!

 

I know absolutely nothing technical about the 20B's, but perhaps those 3 letters are stamped implying the rotor weights for that factory built combo?

 

gonna go look now!

 

And.................???

 

I recently came across a 20b E-shaft and would also like to know.

 

and what are these supposed differences between the shafts supposed to be? most of the differences are in the blocks.

 

There's really no way I've found to find exactly what series shaft you have. The only markings are for the rotor weights. I would love to find some new information on this but your best bet is for everyone to stamp the shaft after removal from the engine.

 

Mine has BBB and 44 on two spots on it.