Can someone explain the difference between old and new style crankshaft Stihl 066?

[fatboy1941]

Would someone please explain the difference between the old and new style crankshaft for a Stihl 066?
My aftermarket crank is too long on one side. VERY frustrating. My saw Serial # is 1264906##.
Is that old or new?

 

[Jacob J.]

The old-school crank for the metal flywheel has a smaller flywheel side stub shaft and the crank is shorter overall since the older saw is narrower.

The poly-flywheel crank has the larger stub shaft which uses a larger flywheel side seal and is 4-5mm "wider."

Based on your serial # off the top of my head it appears that you need the old-school crank.

 

[blsnelling]

Same answer as in the thread from yesterday.

 

[Grande Dog]

Howdy,
Any serial number under X33 917 066 is old style.
Regards
Gregg

 

[watsonr]

Same answer as in the thread from yesterday.

This was a test of the Emergency Chainsaw "I NEED HELP" system to confirm that I actually needed help and that the answer didn't change overnight! :hmm3grin2orange::hmm3grin2orange: