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2 1/2 Briggs......doesn't run smoothly....surges at all speeds.

Briggs and Stratton mower engine

Cleaned carb and changed air filter has frest gas. Starts fine. Runs good until warm then there is a '' surge, slow down, surge, slow down at all speeds. Can't adjust it out.

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  • Anonymous Mar 16, 2014

    briggs and stratton 550 self propel clean air filter

  • Anonymous Mar 16, 2014

    briggs and stratton 550 surge

  • Anonymous Mar 30, 2014

    When I try to pull start I can't get a start. How do I clean carburator.

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Hi, Check that you have the correct spark plug fitted or fit a new one as it sounds like your plug is getting hot then shorting out.
Sometimes the magnito can do this as well. but I would start with the plug.

Posted on Nov 29, 2008

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Posted on Jan 02, 2017

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You passed the mower model number and not the engine model number. When we use the 11A number you passed all we get is the base and handle parts. If you need more help I need the model number off the engine just above the spark plug wire on the air shroud.

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