Voltage to magneto

[6BuchTractorRed]

I put an alternator on my H Farmall that has a magneto and can only get voltage at the resistor but when I connect the wire to the magneto I lose the voltage.

 

[Mark-Ia]

A magneto creates it's own voltage. No need to run a wire to it.

 

[Janicholson]

Sure way to fry the mag. The on off switch is a single pole and ground. it shuts off the mag by grounding it. Jim

 

[Geo-TH,In]

Isn't the wire going to the mag, the kill wire. Short the wire to ground and kill the spark just like a lawnmower

 

[used red MN]

Tell us what you are doing in a bit clearer description. As others have said a true magneto has internal magnets and an armature that spins in them creating it own electricity to create the spark. If you have left the engine in the same position all the time you were making these connections your mag might still be fine. Apparently the points were closed which grounds out the terminal on the mag. If you have tried to start it with voltage on the mag kill terminal it is very likely you have damaged the magneto. Now if you are calling a battery powered distributor a magneto then we will have to explore your situation farther.

 

[wore out]

Tell us what you are doing in a bit clearer description. As others have said a true magneto has internal magnets and an armature that spins in them creating it own electricity to create the spark. If you have left the engine in the same position all the time you were making these connections your mag might still be fine. Apparently the points were closed which grounds out the terminal on the mag. If you have tried to start it with voltage on the mag kill terminal it is very likely you have damaged the magneto. Now if you are calling a battery powered distributor a magneto then we will have to explore your situation farther.

Also, some times folks unhook the internal coil in a mag and install an external coil powered by the tractor's electrical system.

Have to know EXACTLY what you have to giver s good answer.

Photos would help us help you.