Posted by John T on September 03, 2007 at 14:19:00 from (66.244.83.147):
In Reply to: wiring posted by joe moore on September 03, 2007 at 11:04:04:
On a 12 volt tractor you must EITHER use a 6 volt coil and a series voltage dropping (12 to 6) external Ignition Ballast Resistor (after ignition switch ahead of coil) oRRRRRRRRRRRRRR a full true 12 volt rated coil NO BALLAST REQUIRED. If you use a true full 12 volt coil PLUS added external ballast the spark will be weak.
NOTE a 12 volt coil may be labeled "12 volts" or "12 volts NOT for use with external ballast" HOWEVER a coil labeled "12 volts for use with external ballast" or "12 volts ballast resistor required" is in reality a 6 volt coil and requires a ballast JUST LIKE IT SAYS.
Decide if you wanna make the tractor 6 or 12 volts and wire the ignition and/or any ballast as necessary per the above. If you stay at 6 volts use a 6 volt coil and no ballast. If you go to 12 do as above.
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