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I have an Arctic Cat z370 that is fouling one of the spark plugs any idea what may be causing it?
 

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Weak spark caused by poor wire connection. Unscrew plug cap and cut 1/2” off end and install cap. May as well do both. If it still fouls and spark is good, it may be poor compression. Do a compression test and report. You want at least 115 lbs.
 

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We will get it moved to proper forum
 
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