Bad Vibrations

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    • September 8, 2016 at 16:57 #6125
      Daniel Brodsky
      Participant

      I have a 1975 Tiger currently undergoing its annual inspection.

      The mechanic has notice an engine vibration when running at around 1700RPM. It seems to smooth out over 2000RPM. Cylinder compression is good with all four cylinders in the mid 70s. The engine is mid time at approx. 900 hours.

      He thinks it may be an issue with the carburetor and he is also checking the valve clearances.

      Is there anything else he should be checking? I would prefer to avoid a carb overhaul, if possible.

      Daniel Brodsky, N1538R, KFRG

    • September 18, 2016 at 14:53 #6192
      Timothy Engvalson
      Participant

      Daniel,

      I’m curious…did your mechanic solve the vibration?

    • September 19, 2016 at 00:05 #6193
      Roscoe Rosché
      Keymaster

      Daniel,

      If you have the McCauley prop then that is the reason fro the yellow arc on the tach, the vibration of the prop and engine combination in that RPM range during descent, can set up a vibration. It does not happen with the Sensenich props.

      FYI

      Roscoe

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