spark plug won't fire unless I'm touching it

Discussion in 'Electrical' started by stephen7689, Oct 4, 2016.

  1. stephen7689

    stephen7689 New Member

    I'm pretty sure I got to ground it somehow but have no clue all I know is that it won't start and when I take spark plug out to test it I'll push the bike and get no spark but if I'm touching the threads or any metal part of the spark plug while pushing it I get a strong spark so what do I do to get it to spark without me having to touch and hold it

  2. crassius

    crassius Well-Known Member

    I usually hold it against the nut on the muffler - had one years ago on which the guy that painted it got paint on washers holding head on and had no ground to head - try checking that with a meter.
  3. jaguar

    jaguar Well-Known Member

    just put a cloth between your hand and the plug if you're afraid of getting shocked.
    the spark needs a return path which is ground which is the engine metal
  4. THowell1975

    THowell1975 New Member

    Do you mean that your spark plug isn't making good contact into the boot? I've gotten different spark plugs and boots from different vendors. Yours may have a little "nipple" on the end of the spark plug that needs to be unscrewed so it fits properly into the spark plug boot. Does that help?