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  1. #1

    Join Date
    Dec 2017
    Posts
    2
    Location
    Alabama
    Mower
    walker

    Exmark navigatir lose power when start running

    I got 2013 exmark navigator with ch640 kohler engine. And recently it lose power. Starting okay bout when start driving low to high speed it stops.
    It run very slow speed but try to engage blade or try to speed up , then it tried to stop. I changed fuel filter, air filter, engine oil and filter and fuel pump. Bit it is still the same. Is it may be carburetor??

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  3. #2

    2,500 Post Club
    BlazNT's Avatar
    Join Date
    Apr 2012
    Posts
    4,422
    Location
    Missouri
    Mower
    RZ5424

    Re: Exmark navigatir lose power when start running

    I have read this 3 or 4 times and can not make it out. Is the engine failing or the drive failing? Could you be a little more descriptive?
    Chuck
    We Do Not Stop Playing When We Grow Old
    We Grow Old If We Stop Playing

  4. #3

    Join Date
    Aug 2017
    Posts
    33
    Location
    Georgia
    Mower
    MTD - Yard-Man

    Re: Exmark navigatir lose power when start running

    It sounds to me like the engine isnt getting enough fuel and your on the right track. Carefully clean the carb. Also clean the fuel tank. After that if there is still a problem, it could be a bad fuel line. One more thing you might want to check fuel silonoid operation when you clean carb. It could be sticking or need to be replaced altogather.

  5. #4
    LawnWorld Support Catherine's Avatar
    Join Date
    Jun 2015
    Posts
    875
    Location
    California
    Mower
    Kubota

    Re: Exmark navigatir lose power when start running



    Welcome to the forum!

    I'm going to move this thread over to our Exmark section.
    Catherine
    LawnWorld Support

  6. #5

    Join Date
    Dec 2017
    Posts
    2
    Location
    Alabama
    Mower
    walker

    Re: Exmark navigatir lose power when start running

    Quote Originally Posted by dfbroxy View Post
    It sounds to me like the engine isnt getting enough fuel and your on the right track. Carefully clean the carb. Also clean the fuel tank. After that if there is still a problem, it could be a bad fuel line. One more thing you might want to check fuel silonoid operation when you clean carb. It could be sticking or need to be replaced altogather.
    I will try clean carb and update the result

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