Question about RTO Spur Sprocket For Stihl 017, 021 Chainsaws

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Stihl 021 running poorly

My 021 starts easily. But after about 20-30 seconds running wide open it dies out but stays idelng fine. If I shake the saw it will run great for about 20-30 sec. again.

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  • Anonymous Mar 20, 2014

    what cc is this saw

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  • Master
  • 666 Answers

Couple of things I would check first. Place a funnel in a can with a paper napkin covering bottom of funnel. Pour the gas from the saw into the funnel. If there is a lot of trash in there, remove the fuel line from tank. Clean the filter with carb. cleaner. Then clean the tank with carb. cleaner. If you still have problem. Replace the Air inlet tube, (clear tube with screw type device close to carb).

Posted on Apr 16, 2009

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Posted on Jan 02, 2017

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