Posted by John T on August 04, 2012 at 09:40:37 from (216.249.82.117):
In Reply to: Help needed posted by Chuck Croft on August 04, 2012 at 08:32:43:
I have to take some "educated guesses" here, so they are that:
1) The tractor is 12 volts Neg ground, right???
2) Since you mentioned "resistor" the tractor may use a 6 volt coil!!!!!!!!!
3) If you asked for a coil at Advance Auto I sure wouldnt bet my life its a 6 volt coil
BUTTTTTTTT IF ITS A 12 VOLT TRACTOR AND USES A BALLAST RESISTOR (thats around 1.5 ohms and drops 12 down to 6) YOU REALLY NEED A 6 NOTTTTTTT A 12 VOLT COIL
A coil thats labeled "12 volts for use with (or requires) external ballast resistor is in reality a 6 volt and issssssss the coil you need if its a 12 volt tractor with an external series (between ign switch and coil) voltage dropping (12 to 6). HOWEVER a coil labeled 12 volt orrrrrrrr 12 volts NOT for use with ballast is a 12 volt coil and on a 12 volt tractor YOU DONT USE A BALLAST.
Ifffffff its a 12 volt tractor and ifffffffff it has a series ballast resistor, if you use a 12 volt coil the spark will be weak, YOU NEED A 6 VOLT COIL WHEN THERES A 12/6 BALLAST RESISTOR.
Finally, dont let anyone tell you it dont matter which polarity you wire a coil, its true she will still spark if wired bass ackwards, but its more efficient if wired at the correct polarity. If its a Neg ground tractor, + (Battery) on coil wires to switched ignition circuit (or ballast if used) while - (dist) wires to the distributor. Reverse that for Pos ground.
Get it?? Any questions??? I have to go the fair later so may be away a while.
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