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Hello, recently bought a mini max with a Rotax 503 on it, it is serial number 3542803, trying to find out what year it is , any info is great new to these.  Thank you. 

  • Re: Rotax 503

    by » 4 months ago


    The Site ADMIN might be able to give you some info after the weekend if your engine is in the current factory database.
    The 503 was discontinued in 2011. So your is at least 12 years old.
    Check the engine archives HERE for what info is still remaining.


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.


    Thank you said by: Steve McLeod

  • Re: Rotax 503

    by » 4 months ago


    • Production Date18.04.1985
    • Product Serial Number: 3542803


    Thank you said by: Steve McLeod

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