upon burping my 912 i noticed 1 cyl.didnt seem to have good compression,aircraft has not been run in few weeks do to cold wx,after startup all was normal and good rpm on warmup run. after shutdown pulled prop thru and compression felt strong on all 4 cyl. engine has 265 hrs. and i change oil every 20 -25 hrs do to 100ll use just wanted your input on this will be in for cond. ins. this month.
  • Re: compression

    by » 11 years ago

    Hi Timothy,

    It sounds normal especially since it sat a while, but the only way to really know would be to do a differential compression test. My guess if it was running okay the day you put it away nothing happened to it just sitting there.

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

  • Re: compression

    by » 11 years ago

    thought so myself and after searching this subject seen others say same.thanks rodger.

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