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49' 8N Smoldering Ignition Coil

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Laurence Armstr

11-24-2000 13:20:17




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While I was going thru the electrical system in order to trouble shoot the dead ignition system, the ignition coil would start smoking and tar appeared to be boiling out of a seam near the top while the ignition switch was on. I recently replaced the ignition coil, key switch, push button switch, battery, front mounted distributor cap, rotor and condenser, plug wires, and starter relay. The system is dead, starter doesn't even turn over spin, click . . . Just silence except for the sound of frying coil. Is it just a bad coil or is the coil getting fried because of something else? I had a new coil on it but put the old one back on it today that was ok when I replaced it. Archives indicate that there are alot of bad coils out there, both old and new.

Any ideas out there would be greatly appreciated.

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Dell (WA)

11-24-2000 20:10:17




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 Re: 49' 8N Smoldering Ignition Coil in reply to Laurence Armstrong, 11-24-2000 13:20:17  
Laurence..... .the only way for the ignition coil to boil tar, is that your ballast resistor is not in the circuit. It can be fairly eazy to "mis-wire" the ballast resistor out of the ignition circuit. Please recheck your wiring.

On a 6 volt OEM system, you want to read about 3.5 volts (3 min, 4.5 max) at the coil terminal with the points closed and battery voltage with the points open. ..... ...Dell

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Mike from Michigan

11-24-2000 19:32:38




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 Re: 49' 8N Smoldering Ignition Coil in reply to Laurence Armstrong, 11-24-2000 13:20:17  
Laurence
When the ignition switch is turned on and the tractor is not running and the points are closed you have a complete electrical circuit which means the voltage from the battery flowing thru the coil and ballast resistor and then to ground will eventually burn up the coil and ballast resistor. If you have battery voltage at the coil and the ignition switch is on and the tractor is not running then the points are closed.

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points are open

11-25-2000 10:22:58




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 Re: Re: 49' 8N Smoldering Ignition Coil in reply to Mike from Michigan, 11-24-2000 19:32:38  
last word



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TomH

11-24-2000 14:06:12




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 Re: 49' 8N Smoldering Ignition Coil in reply to Laurence Armstrong, 11-24-2000 13:20:17  
Is this a 6 or 12 volt system? Could be missing or shorted the ballast resistor. I'd disconnect the ignition completely until the starter is working and you know you have a good circuit there, double check the ground cable on the battery.



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Laurence

11-24-2000 15:19:36




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 Re: Re: 49' 8N Smoldering Ignition Coil in reply to TomH, 11-24-2000 14:06:12  
In reply to Tom H., its a 6-volt system.



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