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so im trying to get my atv running and i took out the spark plug and realized that the center electrode and ground electrode was touching no gap at all so i pulled them apart and put it back in tried to start it almost worked but after trying to start it after a couple of minutes i took it back out and i saw the same thing: center electrode and ground electrode was touching no gap at all and i dont know what causes it and how i can fix it so any help would be appreciated

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    I'd guess that you have the wrong plug for your motor and have damaged the piston by smashing it into the plug (thus closing the gap) or you have so much carbon buildup on the piston that it doesn't clear the spark plug when at TDC. – user16128 Apr 9 at 0:46
  • how do i check whats causes it tho? – Remy Røyseth Apr 9 at 18:00
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Get a piece of bent wire and use it to measure the plug hole depth of thread.

The sparkplug thread length should be the same as it should be flush with the combustion chamber surface.

Or you could use a vernier depth gauge for a better measurement but if you don’t have one then a piece of wire will give you an idea.

| improve this answer | |
  • how i do that?? – Remy Røyseth Apr 9 at 17:56
  • measuring stick or ruler. – Solar Mike Apr 9 at 18:04
  • so i stick a ruler in the spark plug hole? – Remy Røyseth Apr 9 at 18:09
  • Sorry, what was the first line in my answer? – Solar Mike Apr 9 at 18:11
  • i dont know what plug hole depth of thread is – Remy Røyseth Apr 9 at 18:35

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