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Mower running rough

I have a briggs and stratton 40 quicksilver 46s on a flymo push mower and it is running fast/slow,also chucking out a bit of smoke,also using alot of petrol,any ideas?ta

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  • Samuel Charles Spriggs May 11, 2010

    Have you performed routine maintenance on the engine lately -- like air filter cleaning/replacement?



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  • 41 Answers

This engine may need overhauling,You seem to have either bad valves or rings, or both.

Posted on May 13, 2009

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