Super A Won't Stop running

My Super A will not stop running when I push in the kill switch. I have to choke it to stop it. How can I remedy this? Thanks for any help
 
Mag or distributor??? Hard to help you help your self with lack of info.
That said if it has a mag that means the switch or a wire is bad. If it has a distributor then switch is bad or if 12 volt you wired the alternator up wrong
 
Magneto or battery ignition? If battery ignition and someone has added an alternator, I have seen them feed back through the field wire when they don't have a diode or resistor inline. If magneto, when you shut it off the mag is grounded through a wire to the switch.
 
Likely then that your ignition switch is bad. Which also means your battery is not holding a charge well and the points are going to get burned up fast is you do not unhook the battery when your done. Also not good to choke one to kill the engine that causes wear in the cylinders by washing the cylinder down. Better to turn off the gas to shut it down
 
If its a distributor ignition as you claim (NOT a Magneto) what you call a "kill switch" I would call an Ignition Off/On Switch but that's not the issue. I assume it hasn't been converted to an Alternator in my answer.

A Magneto kill switch circuit simply attaches to the mag and if the circuit becomes grounded theres no spark.

A distributor ignition Off/On switch simply feeds hot battery voltage down to the Coil if ON but no voltage if turned OFF.

If you turn an Ignition switch off yet the tractor keeps running and you kill it by choking or some other method, the coil will continue to draw around 4 amps which will eventually drain the battery plus the coil will get hot and the points can be damaged YOU NEED TO FIX THAT IGNITION SWITCH PROBLEM

John T
 
In the event that this is a case of mistaken identity, this is a magneto:

48042.jpg


This is a distributor:

a5746.jpg
 
My apologies for using the wrong terminology. It is an ignition off/on switch. I found my problem. The secondary wire from the coil to the distributor was touching the lift arm and causing a short. When I relocated it the off/on switch began to work properly again.
Thanks for your help.
 
I like your answer. Someone actually referring to the two systems correctly. Battery ignition or magneto. Notice the magneto indeed does have a distributor on it also.
Just had to throw that out there again.
 
Now I am confused???? Any time I have a short there is smoking and burned up wire. You can't have a short between the coil and the distribitor without something else being wrong as far as I know.
cleddy
 
"You can't have a short between the coil and the distribitor without something else being wrong as far as I know."

I agree to the fact that, you cant have a short without "something being wrong". (but closed points is a "short" to ground remember)

Theres a simple insulated wire from the coils output to the distributors pass through insulated stud,,,,,,,,,then a wire to the points terminal to which the condenser is also attached,,,,,,,then through closed points to ground.

Sooooooooo "somethings wrong" might be a) The wire is bad b) The insulated pass through on distributros side is bad (Ive seen that happen) c) The wire inside the distributor to points terminal is shorted d) The points have a short (closed even if open) e) The condenser or its little wire is shorted.

I guess you understand the points are usually closed meaning yes there is indeed a direct path from the coils output to ground via the closed contact points!!!

John T
 
How would a shorted secondary wire keep the tractor running with the switch off?

If anything, the tractor would NOT run because the spark would be going straight to ground.

Even if you are using the term "secondary" mistakenly to mean one of the small wires, shorting either one of those out would also make the tractor NOT run.

With a battery ignition, for a tractor to continue running, the coil has to be getting power from somewhere. Not sure how a shorted wire would be causing power to get TO the coil.
 
I get that but why does it keep running?? I have had trouble at various points(difficult to find-and failure to run) from the coil thru to the final grounding when the points are closed but when the switch is off there should be no power to the coil unless some other wire was shorting to the ignition system.
I like your first opinion that of a faulty switch or alternator feedback.Cleddy
 
That's dieseling, which is caused by hot carbon in the combustion chamber.

The implication here is that the engine just keeps on puttering away indefinitely, unless the carburetor is choked. This would indicate that the coil is getting power in order to keep producing spark.

Hopefully Charlie comes back to check on his thread again, and will clarify a few things for us. My guess is we will not see him again until he has another issue, because this one is solved, at least in his mind.

For the rest of us, we're still scratching our heads as to how a shorted wire could be causing an engine to CONTINUE to run.
 

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