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  1. G

    Stihl 201 spark arrester plugged

    Buddy--I might could help more if you send me a Private Message.
  2. G

    Stihl 201 spark arrester plugged

    Not quite sure how you increased the size of the exhaust port or what good that would do. Most are the same size as the muffler inlet. Either way, disregard my opinion.
  3. G

    Stihl 201 spark arrester plugged

    If you drilled a sizeable hole =7/16 somewhere on the muffler, exhaust flow through the screen would have been less.
  4. G

    Stihl 201 spark arrester plugged

    If you modified the muffler before your screen got partially plugged, My bet would be that there was not enough exhaust flow through the screen to keep it clean.
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