Tractor runs rough

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  #1  
Old 08-20-07, 10:04 AM
Larryu's Avatar
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Tractor runs rough

I have a Sears 12 hp riding mower with a Tecumseh engine.It runs fine under load but as soon as I disengage the blades and reduce the speed it runs rough and backfires.I have tried adjusting the low speed screw on the carburetor, but it makes no difference.Any suggestions?
 
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Old 08-20-07, 09:29 PM
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The high speed screw is probably the adjustment that would make the most difference here. If adjusting it doesn't help, you may have to clean the carburetor.
 
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