Author	[Modern View]
White Halftrack 10-12-2012 05:55:52 69.80.123.107 Report to Moderator	I have an electronic conversion on an tractor that I would like to switch over to a runner. I do now know much about them and would like to have some idea of what I am doing before I go out and fry myself up some electronics. The facts. EI tractor runs really well. Is 12 volt. There is a resistor mounted right by the coil. I presume. The reisistor means that the coil is 6volt. I can just switch resistor forward to the receiving tractor as it was 12 volt also, but points. From what I gleaned in the archives, if I get a different 12 volt coil, I would not need the resistor? I could not understand that as I thought that would still give too much volts or ohms or jules or stuff to the EI distributor and fry it. Thanks again. Jason [Reply]   [No Email]
JMOR 10-12-2012 06:15:17 72.181.173.171 Report to Moderator	Re: Electronic Ignition Question in reply to TONY JACOBS, 10-12-2012 05:55:52   Quoting Removed, click Modern View to seeAlways safest to contact the mfgr of the EI module, but........it is probably Pertronix or Genesee (same part) & the mfgr specifies a coil plus resistor (total resistance) to be a minimum of 3 Ohms. Sounds like your coil is less than 3 & needs the resistor added to bring it up to 3 total. Yes, if you get a coil with at least 3 Ohms, you can skip the resistor. IC14SB is one such coil.   [Reply]  [No Email]
Texasmark1 10-12-2012 06:34:02 67.142.175.26 Report to Moderator	Re: Electronic Ignition Question in reply to JMOR, 10-12-2012 06:15:17   Agree. The silicon device that dumps the storage capacitor to initiate the spark can only handle so much current and heat is a consideration. Not really a big deal when you think about regular ignition points.......installing a current limiting resistance. My MF manual says that regular mechanical ignition points are rated for 5 amps max which, when you do as Mr. JMOR said will put you right there....14.5v alternator/generator output at PTO rpm divided by 5 amperes is right at 3 ohms of series resistance required. Mark   [Reply]  [No Email]