Question about Yard Machines 158cc Push Lawn Mower #11a 034f200

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My mower only runs full throttle.

Rover sprint 375 easystart 98902(briggs & stratton engine)
my crazy mower will only run full throttle,i have cleaned the air filter and replaced the gasket under the air cleaner also have replaced throttle and torque springs connected to carby with no results.

Posted by Kenny Hunting on

  • 1 more comment 
  • cyclingo Mar 07, 2009

    Think my governor spring is stretched and isn't working properly. I have full throttle, and that 's it. tends to cut out when mowing as well.

  • Anonymous Mar 14, 2014

    Spring set up

  • Anonymous Mar 26, 2014

    new spark plug new air filter and cleaned carby and still running rough 4 stroke 158cc Briggs and Stratton motor



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The internal govner is a good option.

Posted on Oct 18, 2013


Clyde Roberts

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I have no solution, I have the same problem, engine runs full speed WITH THROTTLE PLATE CLOSED. I took the carb off and cleaned it, when I put it back on it ran full throttle with butterfly closed. I figured I had lost something so I ordered a completely new briggs carb and sure enough it runs wide open WITH THE BUTTERFLY COMPLETELY CLOSED. I know that it seems impossible, but is true. I need help.

Posted on Oct 26, 2011

  • Clyde Roberts Oct 26, 2011

    The post I did above about full speed with closed throttle plate is on a briggs&stratton 14.5 HP engine.



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