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Engine Failure 503

in 2 Stroke Technical Questions 13 years ago
Warmed up engine took off climbed to 500 ft pulled power back to 5000 rpm cruised for 5mins into the curuit pulled power to 3000 rpm went to increase power soon as l push throttle forward engine stop.
No miss no sign of anything wrong.
Landed safely engine restarted fine cant find any thing wrong any suggestions.
Cheers Geoff..

  • Re: Engine Failure 503

    by » 13 years ago

    As soon as it stopped in flight did you attempt to restart and it a pull start, just wondering if it felt tight to turn over,

    How long have you operated this engine...has it had any other problems or recent work/adjustments made to it.

    Nick.
      
    Report

  • Re: Engine Failure 503

    by » 13 years ago

    Hi Nick engine has had full rebuild it has done 23.5 hrs l had just put a carby kit in it 2 hrs ago.
    It has a slight miss at 3000 rpm and evens out soon as it gets over that.
    When l landed l moved the prop and motor is fine check carby bowles both had fuel restarted straight away first pull check ignitions they are fine pull plugs they are brownish color.
    not sure what is next dont want it to happen again.
      
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  • Re: Engine Failure 503

    by » 13 years ago

    Did it have the miss at 3000rpm before the carb work???

    Nick.
      
    Report

  • Re: Engine Failure 503

    by » 13 years ago

    Yes thats why l did the carbys new needles needle jet main jet no difference its like it has a flat spot.
    At high revs no problems
    l didnt think it would stop the engine .
      
    Report

  • Re: Engine Failure 503

    by » 13 years ago

    Geoff,

    Do you remember the temp and humidity that day? Could have been carb ice. Some say you don't get carb ice with a Rotax 2 cycle but I can tell you from personal experience that you can. Usually get some warning though,such as rough running and RPM drop though.

    Nick is probably on the right track. It is suspicious that you were in that flat spot range when the engine stopped.

    What are your EGTs at 3000RPM?

    Bill.
      
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