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I don't like burping the engine manually and it hurts my shoulders but it's a dry sump system so I know it has to be done. Is it possible to use the starter motor (in a 912ULS) to burp the engine? If it could be wired up so it could be engaged with maybe half voltage (so it doesn't go too fast which I know is not good for burping) and with the magnetos off then is that a possible way to burp the engine?

  • Re: Burping using the starter motor?

    by » 4 months ago


    It has to be Burped to check the Oil Level, not for every start.

    You need to STOP at the top of each compression so even 1/4 speed would be way too fast and 6 volts would never turn the engine over unless you pulled a plug from each cylinder which would defeat the whole burping process.

    There is no simple alternative.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Bill.Hertzel@Yahoo.com
    Clicking the "Thank You" is Always Appreciated.


    Thank you said by: RotaxOwner Admin, Pilot Joe

  • Re: Burping using the starter motor?

    by » 4 months ago


    The first start of the day I meant.

     

    So that means the only way would basically be to fit in a new gear system after the starter and obviously that would be impractical.

     

    Thanks for the advice. I guess I just need to man up and keep turning. :P


  • Re: Burping using the starter motor?

    by » 4 months ago


    One of the things I learned from an official Rotax class I took was, if you have oil on the flat of the dipstick before burping, then you have enough oil... no need to burp, just go fly!


    Thank you said by: Pilot Joe

  • Re: Burping using the starter motor?

    by » 4 months ago


    I didn't know that. I'll keep it in mind. It's probably still good to turn it over once or twice just so you can feel the compression for anomalies as part of the engine preflight though.


  • Re: Burping using the starter motor?

    by » 4 months ago


    Perhaps a different technique might help? Use less force, do it slowly. If your shoulder tends to hurt, don't grab the prop overhead but at a lower position instead. Turn at small increments. Relax and wait when you feel compression building up. Try to think of it as an act of meditation.


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