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    OMC 400 Problems!

    I have a 1980 OMC 140HP with the 400 stern drive in it. This last Sunday at the lake it started having a slight vibration in it. I noticed at a slow idle that you could really feel the vibration and it also turned hard when turning to the left but turned very easily and no vibration when turning...
  2. G

    1980 OMC 140HP Max RPM

    I have a 1980 OMC 3.0 Chevy that is rated at 140HP. Can anyone tell me what the recommended max rpm was on this engine? Engine runs pretty smooth until you reach the top end then kind of just stalls out at about 3,800 rpm and 29 MPH. It has a 13 3/4" x 15P prop on it. Seems like it should turn...
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