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Spark plugs 1 ,2 ,and 4 are charcoal black wtf ?

Discussion in 'XJ Technical Chat' started by jonnymaritime, Jun 9, 2008.

  1. jonnymaritime

    jonnymaritime Member

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    Ok so I have an Idea its running rich , Am I forced to remove the tank to play with the screws? What is the reasons why they keep blackening. It seems to run fine . but every fewe KM it does not want to start (because of the dirty plugs) My number 3 plug is like a caramely brown , the rest are BLACK.
     
  2. Anthony14

    Anthony14 Member

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    Ya, either the carbs need cleaning, or the screws are out of the proper position, or at least thats what I would assume...
     
  3. xyxj650

    xyxj650 Member

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    sounds like the mixture screws need to be adjusted like you said. They should look like your #3 plug I believe.
     

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