No spark Farmall H, 6volt, neg ground

Harv42H · Oct 14, 2014

Does the voltage regulator control spark? I've replaced points, condesor,Plug wires,plugs. Did not replace rotor and cap, they seem fine alittle grey color on inside of rotor cap. I've replaced the 6 volt coil.

Wayne in MN · Oct 14, 2014

In a word, NO.
1. Check inside the distributor to see if the condensor wire is touching ground.

2. Remove the coil wire from the cap center hole and hold it about a 1/4" from metal ground. With the switch on and points closed, use your fingernail to "flick" the points open several times. You should observe a bright blue spark from the coil wire air gap.
Many times the points need cleaning to make a good connection.

Good luck.

John T · Oct 14, 2014

The Voltage regulator isn't the cause of no spark. If you work through my Ignition Troubleshooting Procedure it can help find the problem. Most common causes are points that are burned or oxide coated which a cleaning may cure, check the points and gap first then work my procedure...

John T
John Ts Ignition Troubleshooting

GordoSD · Oct 14, 2014

Why do you have a negative ground?

No spark Farmall H, 6volt, neg ground

Harv42H

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Wayne in MN

Well-known Member

John T

Well-known Member

GordoSD

Well-known Member

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