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Brand new honda lawnmower starts and runs fine then backfires

My new honda motor lawnmower will start and runs fine then it will starts to sputter and back fire.  then stops.  spark plug is getting carbon on it.

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  • Cameron loker Jun 21, 2009

    no I don't know very much about carbs

  • Jim Parker
    Jim Parker May 11, 2010

    Have you tried adjusting the H & L screws?

    Jim

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  • 1,040 Answers

There should be 1 or 2 screws on the carb. You will probably have to remove the air breather to get to the screw(s). I've been seeing a lot of these types of questions, new equipment not running properly. Factory settings were not set properly.

When you find the screw(s), screw in a clockwise direction until it stops; DON'T SCREW DOWN TIGHT, JUST UNTIL IT STOPS. Then unscrew counter clockwise 1 1/4 turns. Try starting.

Continue this process, 1/4 turn at a time up to 2 1/2 full turns. If you forget where you are at on the turning process, start over by screwing back down. Then pick up process where you left off.

If you need further assistance, just let me know.

Jim

Posted on Jun 21, 2009

  • Jim Parker
    Jim Parker Jun 23, 2009

    If you decide not to attempt to adjust the carb., then Maybe it would be a good idea to take it back to where you bought it. They should make it right since it's brand new.

    Thanks for the rating.

    If you should have any questions about
    "Drywall Finishing/Patching", or know someone who does, put your
    questions to Category:"Tools- Building & Power- HAND TOOLS" at
    FixYa.com

    Thanks Again,

    Jim













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