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Rotax 912/ULS2 carburetor five years old with 410 hours.  Have used 100LL since new.  What would cause this kind of damage?

 

9726_1_700002131.jpg (You do not have access to download this file.)
9726_1_IMG_2127.jpg (You do not have access to download this file.)
9726_1_IMG_2128.jpg (You do not have access to download this file.)
  • Re: Carburetor issue

    by » 12 months ago


    I'm not 100% sure because of the picture, but it looks like water damage. The last two pics look like the water damage.


    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell


  • Re: Carburetor issue

    by » 12 months ago


    Should there have been any indications while operating the engine before the visual inspection of the carb?  Would any water show up in an oil analysis report.


  • Re: Carburetor issue

    by » 12 months ago


    That is damage/wear from a rough-running engine due to not having the carburetors synchronized, vibrations within the gearbox, or an unbalanced propeller. We recommend installing new carburetors (and synchronizing them), doing a gearbox inspection (replacing worn components), and dynamically balancing the propeller, all at the same time. Unfortunately, those carbs need to be replaced due to the damage in the carb body, as the engine will never run properly once the carburetors are worn to that degree.


    Thank you said by: Garrett Wysocki

  • Re: Carburetor issue

    by » 12 months ago


    In the UK we call that certified technician damage, they have the piece of paper but no idea what they are doing, carbs badly out of sync for that to occur, same as one i went to visit today were mechanical balance alone was 6mm out. 


  • Re: Carburetor issue

    by » 12 months ago


    Rotax-Owner wrote:

    That is damage/wear from a rough-running engine due to not having the carburetors synchronized, vibrations within the gearbox, or an unbalanced propeller. We recommend installing new carburetors (and synchronizing them), doing a gearbox inspection (replacing worn components), and dynamically balancing the propeller, all at the same time. Unfortunately, those carbs need to be replaced due to the damage in the carb body, as the engine will never run properly once the carburetors are worn to that degree.

    concur


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