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Subject: 8N runs for a couple of seconds, then dies.

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Gregg    Posted 06-10-2017 at 22:11:58 [URL] [DELETE]        [Reply] [Email]  
  • 8N runs for a couple of seconds, then dies.
  • I bought my first tractor a month ago. It's an 8N with a front mount distributor, currently a 6-volt system. Can't read the number on the side of the engine. I can get it started but it only runs for a couple of seconds before it dies. I tried to get it started today but after 7 hours my patience wore thin and I went inside. I have changed the points, plugs and have had the carb rebuilt. It is getting plenty of gas. Could this be a coil issue or maybe a bad ignition? Any help would be greatly appreciated. My apologies if this topic has been covered.

    Rustyal    Posted 06-14-2017 at 20:36:01 [URL] [DELETE]        [Reply] [No Email]  
  • Re: 8N runs for a couple of seconds, then dies.
  • Could be the switch.

    Bruce (VA)    Posted 06-10-2017 at 22:26:12 [URL] [DELETE]        [Reply] [Email]  
  • Re: 8N runs for a couple of seconds, then dies.
  • You could have a fuel problem or you could have a spark problem.

    You need to stop replacing parts before you troubleshoot the problem. Unless you have confirmed that the part is defective, assume it works.

    First, put your battery on a charger. (see tip # 60)

    You need a strong battery to:

    1. Close the solenoid

    2. Spin the starter

    3. Engage the bendix

    4. Provide voltage to the coil.

    As the battery gets weaker, the first thing to fail is your spark. If the battery is almost totally dead, all you will hear is the solenoid clicking.

    The more current you use to spin the starter, the less you have for the ignition.

    Once the battery is fully charged, try to start it. Now this is the important part: as soon as it stops running, not five minutes later, find the answer to these two questions:

    Does the tractor have a spark that will jump 1/4" in open air?*

    Will the gas drain out of the carb bowl in a steady stream and fill a pint jar in less than 2 minutes?

    Post back w/ what you find.

    *If you don’t own a spark checker w/ an adjustable gap, buy one. In the meantime, an old spark plug w/ the gap opened to at least ¼” will work. Ground it to a rust & paint free spot on the engine turn the key on & look for a spark.

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