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Jp southwick

No spark on my 1974 B-80

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Jp southwick

so I fryed my ignition when jump starting it, so I changed that. now I don't have spark which is the first time I've ever had this issue. so far I've changed coil, Solenoid, and PTO safety switch. it seems I can't get 12volts to the coil or points. any idea's

I don't have lights and can't find any fueses at all on this tractor.

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rmaynard

Try removing the two wires from the back of the ammeter and connect them together.

If that's not the problem, it may be your ignition switch.

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Jp southwick

I just replaced the ignition switch with a new one. i'll try connected the wires in the back of the amp meter. if that works does that mean the amp meter is bad?

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rmaynard

Yes, all low amperage 12 volts goes through the ammeter. See diagram below:

 

1974_B-80_Wiring.png

And be sure that the ignition switch that you got is for battery ignition and not magneto. Magneto will have and M lug on the back. 

Looking at the wiring diagram, the ignition does not go through any safety switch.

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Jp southwick

ok i'll check this out thank you

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TDF5G
1 hour ago, rmaynard said:

Yes, all low amperage 12 volts goes through the ammeter. See diagram below:

 

 

And be sure that the ignition switch that you got is for battery ignition and not magneto. Magneto will have and M lug on the back. 

Looking at the wiring diagram, the ignition does not go through any safety switch.

:text-yeahthat:

Make sure the ignition switch is wired correctly.

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Jp southwick

my safety switch at the PTO is wired different than this diagram. everything seems to be wired thru it, the clutch safety, seat safety, ignition etc?

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gwest_ca

What is the model and serial number on the tractor ID plate?

 

Perhaps yours is wired like this one

Garry

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Jp southwick

that worked, the ignition was mis wired, thank you

 

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