Cub magneto

Sat Dec 29, 2012 12:14 pm

The rotor in the magneto suddenly stopped turning what could be wrong/broke in the mag to keep rotor from turning

Re: Cub magneto

Sat Dec 29, 2012 2:22 pm

Could be the pinion gear or the rotor itself. Have you took them off and looked at them?

Re: Cub magneto

Sat Dec 29, 2012 2:45 pm

Yes we took the rotor out and looked at the 2 gears behind that but don't see anything else that's visible, when you turn over the motor the rotor doesn't turn, and when I parked it a week ago it was running fine..

Re: Cub magneto

Sat Dec 29, 2012 3:02 pm

With the rotor and pinion removed, does the shaft that the pinion mounts on turn when the engine is turned? Can you hear a "click" in the Mag when the engine is turned?

Re: Cub magneto

Sat Dec 29, 2012 9:49 pm

Look at the gear on the back of the rotor. Most likely it has some teeth stripped. If not check that the teeth on the drive gear (pinion gear) are mot worn off. Another question is are the points opening and closing?

Re: Cub magneto

Sun Dec 30, 2012 10:37 am

wmatthewb:

Image to Farmallcub.com :big smile: Forum Family. And you have come to the right place for all things Cub related. If you click on the Site Rules, Regulations, & Important Information, it will point you to :arrow: the Welcome Wagon wherein you will find links to many useful sites and topics. One of which is the Cub Manual Server. Enjoy!.


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The GSS-5035 Service Manual Magnetos should be of some help as well.

Re: Cub magneto

Tue Jan 01, 2013 9:23 pm

Removed mag today to revel springs,broken teeth etc falling out the front of the mag :( :(

Re: Cub magneto

Wed Jan 02, 2013 10:50 am

wmatthewb wrote:Removed mag today to revel springs,broken teeth etc falling out the front of the mag :( :(
how about some pictures? Maybe we can help with parts or advice.

Re: Cub magneto

Wed Jan 02, 2013 6:28 pm

PM sent with explanation. Be sure we have a magneto and not a distributor.