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I replaced the carburetor , the engine starts but doesn't run smooth. Toro Lx425

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  • dlozen801 May 06, 2010

    New fuel filter and plugs were installed yesterday... Any other Ideas. Possible carb adjustment or messed up linkage?


  • dlozen801 May 06, 2010

    Alas, I put a brand new air filter on the engine when I replaced the carb and also a brand new fuel filter.
    Is it possibly bad fuel?


  • dlozen801 May 07, 2010

    Aha, It doesn't run rough when it's loaded with the dexk. I'll adjust the idle tomorrow...


  • dlozen801 May 07, 2010

    We worked right through to the only logical solution for the problem. Thank, You...



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Try changing the spark plug on it. It could be fouled out. Also, you could be starving it for fuel, check the fuel line and make sure it is not kinked or clogged. Depending on its age it may be time to replace the fuel filter on it also.

Posted on May 06, 2010

  • 1 more comment 
  • Chris Yelton May 06, 2010

    what does the air filter look like? I had one that ran rough, but the air filter was very dirty. did you check the fuel filter and fuel line?

  • Chris Yelton May 06, 2010

    It could be bad fuel. My 20hp briggs would run sluggish with 10% ethanol but it wasnt that ruough. If you are trying to use last years gas then I would say thats it. Get some fresh fuel for your mower and dump last years in your car. Your car can mix it with the fresh gas and run fine, your mower cant.

    Since you rebuilt it you may have to readjust your idle on the carb. If it is too low it will idle rough but should be fine at high idle. Is it rough at high idle too?

  • Chris Yelton May 06, 2010

    check the gap on your spark plug too.



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