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Engine Warning Light Question

in General Tech Discussion 7 years ago

  • Re: Engine Warning Light Question

    by » 7 years ago

    Thanks Bill! I went in to the airport tonight and fixed the loose wire going to the regulator. That fixed it. I started the engine and ran it up to 4000 rpm and back down to idle several times. The warning lamp never came on. I then did a few touch and goes. Never came on again. The voltage stayed right at 14V the whole time.

    It usually does take me a few minutes to taxi back to the hangar. I can understand the soot on the plugs from the prolonged idle, but why only on one side of the engine?
      
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  • Re: Engine Warning Light Question

    by » 7 years ago

    The Idle mixture on one side may be running a little too rich.
    Alternately, the idle mixture on the other side may be a little lean due to a slight restriction in the Idle jet.
    Or the Floats on one side may be floating lower causing the rich mixture.

    If it sits for long periods between flights, the fuel may be evaporating causing varnish in the jets.
    A basic spray of carb cleaner in all the little holes might be an easy way to start.
    Running a tank full of MOGAS with 10% ethanol through the engine is an inexpensive way to clean the system.
    ( I can already sense the lynching party forming because of that last line!) :ohmy:

    Check the carb sync. It may be slightly off.

    The Light Tan plugs may be the side with the problem.
    After you get it balanced, no one is saying the soot will go away.
    Sooty Plugs on BOTH sides is the norm after a long taxi.

    Soot or No Soot is not of any great significance.
    One side being different from the other is the point of concern.

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
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