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Thread: 912 ULS rough running at 4600 rpm

  1. #1

    Join Date
    Nov 2014
    Location
    Sebastian, FL
    Posts
    38

    Default 912 ULS rough running at 4600 rpm

    hello everyone,
    I have a kitfox S7 with a 912 ULS , after flying for about 1/2 hour the engine has these instantaneous misses every few seconds or so between 4500 and 4600 rpm.
    When I change the power setting it seems to go away.

    I've cleaned the float bowls (found some small particles in the left bowl) , I weighed the floats (they're in spec), I've installed carb heat, I've done a flow test, I've checked the fuel filter.

    Any Ideas?

    Thanks.
    Karl

  2. #2
    Senior Member Dusty's Avatar
    Join Date
    Dec 2012
    Location
    Christchurch, New Zealand
    Posts
    378

    Default Re: 912 ULS rough running at 4600 rpm

    I had a similar situation a while back.
    After trying the usual suspects, I decided to turn one ignition at a time off in flight.

    After finding the culprit and fitting another module this hasn't returned. The miss was more like a random kick to the airframe.

  3. #3

    Join Date
    Nov 2014
    Location
    Sebastian, FL
    Posts
    38

    Default Re: 912 ULS rough running at 4600 rpm

    great idea! thanks

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