39 A , No spark Sometimes

arothermel

New User
39 John Deere A, Magneto, hand start, 4 speed tractor with styled grill. New Points, condenser. Some times it starts and keeps running and sometimes it won't start. When I pull the plugs there is no spark. I can hold the plug wire and there is nothing. I am confused because it works well sometimes. Could this be the magneto.
 
Confusion very often the telling symptom of an intermittent coil be it mag or distributor ignition. And you won't know for sure until you change it out for a good one and the confusion disappears. It can also be spark plug wires especially in conduit, another item that if not already newish needs to be replaced to find out if that was it or not. Cap or rotor can also have bad days, but often these will show signs of arcing inside if this is the cause. You wouldn't catch me holding a plug wire whether it had a grounded plug at the end or not, I've just about accumulated all that kind of fun I can stand. A night and day difference smells like a coil to me.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top