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Hello everyone, 

I bought a Rotax 912S3 engine from a builder. The engine was manufactured in 2014 and has 24 certified hours. It has been in storage since then, with automotive paraffin inside the cylinders and applied elsewhere, and sealing plugs on all fittings.

I’m now going to install it, and given these 11 years without running, my plan is to: remove the spark plugs, turn it by hand, lubricate it, replace the filters, check the valve clearances to avoid air bubbles, replace the fuel pump, and change the valve cover gaskets, etc.

Regarding the carburetors, what would you recommend considering this inactivity of over 11 years? I completed the Rotax IRMT training, but I no longer have the documentation for overhauling the carburetors. Any advice would be greatly appreciated.

Thank you for your help.  Regards. 

 
 

happy wife, happy life. 

  • Re: rotax 912S3 New old stock questions

    by » one hour ago


    600 hours or 5w years.

     


  • Re: rotax 912S3 New old stock questions

    by » 32 minutes ago


    Make sure you do a good oil system purge. I do it twice to always make sure there are no large air in the system issues. The carb "O" rings will be dry and cracked and will most likely break apart if you try to remove them. I would replace all the "O" rings in the carbs and the needle valve. i just overhauled a set that were a tad older than yours and the "O" rings and the needle valve were bad. The internal metal parts of the carb should be okay since they haven't been in use and vibration should have caused wear.

    If you have any questions you're welcome to give me a call.

    Roger at 520-349-7056 in Tucson, AZ


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


  • Re: rotax 912S3 New old stock questions

    by » 12 minutes ago


    Thank you Roger for your expertise. 

    So do you have the manual for overhauling the carburetors?


    As for the air purge in the oil system, I learned that topic during my ROTAX training, and as you said, it’s very important.

    Thanks.


    happy wife, happy life. 


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