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  1. C

    I have a jd 240 mower [vintage 1989]. The mower started this season just fine! But started back firing and now it just won't start.

    Thanks for info. The mower has started to smoke some. I will think about rebuilding the motor.
  2. C

    I have a jd 240 mower [vintage 1989]. The mower started this season just fine! But started back firing and now it just won't start.

    Okay after trying all of the about things I went on youtube and look for videos of others who had the same problem. (Not that I hadn't already done some of that.) I found 3 videos by Small Engine DIY 1. 2. 3. The videos showed the diagnosis of the same symptoms i have been seeing. He changed...
  3. C

    I have a jd 240 mower [vintage 1989]. The mower started this season just fine! But started back firing and now it just won't start.

    Thanks all, I will look into both things when I get a chance. I looked at the relative position of the flywheel magnet, the ignition coil and top dead center of the piston. Where TDC is, the magnet are almost past the coil. It would seem the spark happened just before TDC. I don’t really know...
  4. C

    I have a jd 240 mower [vintage 1989]. The mower started this season just fine! But started back firing and now it just won't start.

    The mower started just fine at the start of this season. Then it started back firing on some restarts and now it will not start. I have looked at the fuel pump and it's fine. Looked at the carb bowl and it was clean although I did not clean the jets. Tried using start fluid to no avail. Didn't...
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