Allis C mag timing gear HELP

bwilcox · Aug 17, 2009

I have an Allis C which has started faithfuly until Monday. Found that the mag gear has jumped 1 tooth on cam gear . Crank and cam gear are on the money . How is it possible this could happen ? Might the mag gear spin on the shaft it's on ? If so how do I get the shaft and gear out of the casting . Brian

Bob · Aug 18, 2009

"How is it possible this could happen ?"

It DIDN'T happen.

There's no way a gear train in decent condition can jump time by one tooth.

Suggest you figure out the REAL reason it won't start.

Ole Shovel · Aug 18, 2009

On a FM-X4 mag the fiber dist rotor gear won"t jump a tooth in the mag but it could shear some teeth off or the fiber gear could turn on that shaft. I have seldom seen the gear turn on the shaft look closely if that"s what you are talking about it probably has teeth sheared off. Internal engine gears you have teeth stripped off, keyway tore out or a broken cam shaft it didn"t jump a tooth internally without something being way worn out or broke inside. Instructions link below is for timing a FM J mag but same applies for a X mag but the gear is mounted on breaker bearing bracket instead of the cover cap and you align the "C" mark up with a mark or beveled tooth on the metal inside the mag for CW drive mag on AC engine.
AC B timing with FM J mag

Allis C mag timing gear HELP

bwilcox

Member

Bob

Well-known Member

Ole Shovel

Member

Similar threads