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2005 4 stroke DF140 bogging hesitating

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  • 2005 4 stroke DF140 bogging hesitating

    I need some help. Just bought a used 2005 DF140. After 20-30 minutes of use, it bogs, and hesitates at higher throttles. When I idle its ok, but when I throttle up with a load, it does not want to go. Or when I am on a plane with just me, it goes way down from 5000 rpms to like idle. It goes away somewhat when I squeeze the primer bulb.

    So, I replaced both fuel filters, took apart VST, it was clean as a whistle, changed primer bulb, fuel line from tank to engine and even yesterday now, I swapped the fuel source to a portable tank, and it still does it!

    I cannot afford a large mechanic bill...does anyone have any ideas? Could it be the injectors? No fuel lines pinched...

    Help!!!!

    Jeff

  • #2
    Check the low pressure fuel pump.

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