O14 won't shut off with mag kill setting

Well I posted about this problem before. I Fully understand how the kill setting works on the F 4 mag the points rotate till they come into contact with the grounding tab on the mag case. Well that's not killing the engine.( worked before) I suspect that the mag itself needs to be grounded well to the tractor .I'am thinking that I have a faulty ground between the mag to the tractor.What say the the electrical gurus here? I'd rather not pull the mag off because the tractor runs quite well but won't stop

Is the kill switch on the mag or is it up by the steering wheel if on the mag them try a wire from the frame to it and if that kills it the switch is dirty. Or if by the steering wheel try to same thing.

Some F4 replacement ignition points do not have the piece that contacts the grounding tab. Have a good look at yours. Jim

"I suspect that the mag itself needs to be grounded well to the tractor. I am thinking that I have a faulty ground between the mag to the tractor."

While the mag needs to be grounded at least somewhat to the tractor to provide a return path for spark current grounding to "kill" it is WITHIN the mag.

i would be looking at the points and the cover to see if its grounding out when rotated. hardly possible the mag isnt grounded to tractor when its mounted with four bolts.

Put in the position to stop. use a wire to ground the mag to the block. if it stops, there you are. if not, check the point contact placement. Jim

Probably have a bad switch does it die if you ground the kill wire on the mag. You could have a bad wire from switch to mag it should die if you ground the wire off the sw. Your problem is either the wire or the sw

Disconnect the link between the mag and the spark control. Operate the mag advance by hand and see if it shuts off, the link might be bent and not turning it far enough. If no kill, the grounding pin may be gone, or the tab on the breaker point spring may be bent against the spring,causing no-contact with pin before you come to the end of the slot in the point cup. (or the tab is missing entirely). The mag does not need to be grounded to short the primary circuit.

An electrical circuit is just that, it is a complete circle for the path of the electrons to flow. As the mag turns it charges the condensor when the points open. As the magnetic field collapses, the electrons flow from the condensor back through the windings (coil) and is stepped up in voltage (like a transformer) and heads to the distributor. Running through the carbon brushes (which by the way are resistors by nature) the electrons flow through the wires, jump the gap in the spark plugs and "ground out" to the head. Flowing through the engine, the electrons flow back to the mag bracket, then the mage base, and in the ground of the condensor and coil. That completes the circuit. If the mag is not making proper contact with the mag bracket, no flow of electrons will occure and thus the engine will not run. Yes, there is the chance of electrons flowing through the mag coupler, but that is not reliable and some couplers are fiberous (an insulator).

IF the part that holds the points rotates and does not make a good contact with the grounding pin OR the wire from the points cap does not make proper contact, then the points/condensor are not grounded and engine will continue to run. Your problem is in the points rotating area, the grounding pin, and or the grounding wire if you have a remote grounding switch.

If you don't believe the electric circuit theory, start the tractor, take off the points cover, and using a well insulated screwdriver, short the points to the body of the mag. If the engine dies, it's you grounding pin system that needs repair or adjusting.

Some F4 replacement ignition points do not have the piece that contacts the grounding tab. Have a good look at yours. Jim