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How can l tell the age of my engine

in 912 / 914 Technical Questions 12 years ago
Hi how can l tell what the age is of my 912ul engine do the serial numbers mean anything.
serial number is 3792968.
The reason l am asking that it needs a rebuild ,it has broke oil ring valve guides are worn its done 351hrs over at-least 15 to 18 years it is out of a zenith 701 l just purchased ,is it out of time.
cheers Geoff.

  • Re: How can l tell the age of my engine

    by » 12 years ago

    Hi Geoff,

    A Rotax distributor will need that engine serial number to give you the year of MFG. Maybe Rotec will jump in here and give you a date.

    Here's the thing about engines. They like to be run and stay lubricated. With an engine that is that old with those few hours it had lots of time to sit and get dry on the internal parts each time it was started. It was probably poorly lubricated and you had a lot more wear than an engine run more often. So many more parts were scraped, scratched and rubbed on your drier starts.

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

      
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  • Re: How can l tell the age of my engine

    by » 12 years ago

    Thank you Roger do the engines have a time of expiry l hear a lot of people say the there engine has time out they are replacing them are they referring to the case as you can replace all the moving parts with a rebuild.
    cheers Geoff.
      
    Report

  • Re: How can l tell the age of my engine

    by » 12 years ago

    Hi Geoff,

    The people you are talking about may be referring to the Rotax engine time limits. The 2 strokes and 4 strokes have hours of operation and years in operation time limits before they are supposed to be rebuilt. You can look in the appropriate manual for each engine and find those time limits.

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

    Thank you said by: marco giovanni lo giudice
      
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  • Re: How can l tell the age of my engine

    by » 12 years ago

    Hi guys,
    engine s/n 3792968 was made June 1991
    Rob
      
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  • Re: How can l tell the age of my engine

    by » 12 years ago

    Hi Rob thank you for the information that's 22 years old and done 351hrs it has a broken oil ring and the broken piece is no where to be found where could it have gone there is no way it can get past the bore
    The spring has been rubbing no the barrel and worn a grove shaped like the spring in the piston ring grove.
    cheers Geoff.
      
    Report
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