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Burping 912IS

Category: 912iS Technical Questions 4 months ago

In the colder weather 30's and 40's I'm finding it hard to "burp" the 912is to check oil.  Any suggestions?

  • Re: Burping 912IS

    by » 4 months ago


    Yes they are hard...three options,

    1) If the oil is already on the flat area of the dipstick do not bother. Just starts and check the oil pressure is OK. Check the level at the end of the flight.

    2) If there is NOT a pool of oil on the floor then you have not lost the oil so start the engine for 20 seconds. Then stop and check.

    3) Continue to turn the prop and Burp as per normal and save yourself the gym membership !

     

    I am sure there are plenty of options, not everyone burps. I have found my IS does not use much oil and needs no top up between the 100 hr oil changes.

     

     

     

     


    Thank you said by: mike montgomery

  • Re: Burping 912IS

    by » 4 months ago


    Burp it after flying it while the engine is still warm.  The oil level will register a tad bit low due to a small portion of the oil still clinging to the interior surfaces but it will be good enough to generally estimate the oil level.  Alternatively, preheat the engine before burping/checking the oil.

    Also, be sure to pause in turning the prop when the prop is in the midst of a compression stroke -- allow the compression built up within the cylinder to escape past the rings thus pressurizing the crankcase and forcing the oil into the tank.  I have observed many 912 users who hand-spin the prop at a high speed like they are trying to start the engine -- go slow and pause as you go through the top of the compression cycle.


    Thank you said by: mike montgomery

  • Re: Burping 912IS

    by » 4 months ago


    The owner of a kitplane company once told me that his oil level check was to look at the belly of the airplane. If it's clean, oil level is good. Not sure that is the system I endorse, but that was his approach.


  • Re: Burping 912IS

    by » 4 months ago


    Preheating is probably the best idea.  Much better for your engine and will start easier.

    http://www.reiffpreheat.com/Rotax912.htm

     


    Thank you said by: mike montgomery

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