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Subject: 8n not firing

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Victoria    Posted 07-09-2019 at 08:35:22 [URL] [DELETE]        [Reply] [Email]  
  • 8n not firing
  • New wires new coil new electric ignition
    Still not starting . Just turns over. Replaced
    Spark plugs last summer actually replaced all of this last summer too
    And also a new resistor. Which it didnít have on it
    Now it does. But Iím wondering if thatís the problem when we remove toolbox to put new wires on. It had 4 wires together on what was left of one screw of a resistor Not sure how it was wired
    Any info appreciated

    Rdavis    Posted 07-10-2019 at 12:58:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8n not firing
  • Get yourself a test light and a good wiring diagram. On my 8n if anything arcs or shorts the coil fails. If you have power to the top of the coil and no spark this is likely your problem (as long as the wiring is correct). I assume you connected the electronic ignition to the top of the coil. Also I assume you gave converted to 12v.

    Bruce(OR)    Posted 07-09-2019 at 16:25:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8n not firing
  • BANG!
    A shot in the dark.
    New coil. Electronic ignition.
    Chances are you don't need the resistor for the ignition system.
    That coil should be marked "Internal Resistor" possibly. if it is, remove the external resistor.
    Most every tractor out there is a variation to one form or another.
    Your electronic is just one option.
    Do you get spark out of the coil when cranking?
    Yes?
    Do you get spark out of the plug wires when cranking?
    No?
    Shorted rotor.
    Another BANG!

    Victoria    Posted 07-09-2019 at 08:48:57 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8n not firing
  • Also. Itís got a new ignition switch
    Itís a 12 volt

    JMOR    Posted 07-09-2019 at 08:44:14 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8n not firing
  • You are going to need to know/learn how it is wired, as a basic starting point.

    Victoria    Posted 07-14-2019 at 21:40:16 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8n not firing
  • I wired it just like the diagram on myfordtractors.com

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