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2014 G21 hard vibration

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  • 2014 G21 hard vibration

    Yesterday approaching our dock very slowly and gradually my G21 started a pretty violent and rough vibration felt on the steering and throughout the whole boat as well. I immediately pulled it out of the water and inspected the prop, rudder, fin, driveshaft, etc. as best I could and found nothing visibly wrong. Any idea what this could be?


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  • #2
    So there really are only 2 possibilities:

    - As you were coming in, you hit something and dinged the prop. Even a small bend can cause a big vibration.

    - The drive shaft is cracked and it's about to shear off.

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    • #3
      Almost the exact thing just happened to us a couple of weeks ago. We checked the prop, rudder, shaft - everything looked fine. Turns out, the bolts connecting the prop shaft to vdrive had worked themselves loose, almost all were finger tight, causing a pretty severe vibration - almost a shudder when you were at speed and turning. Ours got loose enough that there was concern with the cutlass bearings in the strut possibly being damaged, getting replaced as we speak.

      Point being, there are actually a number of different things that can cause vibrations (struts, bearings, motor mounts, shafts, props, etc.),
      Last edited by blueroom; 1 week ago.

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      • #4
        Originally posted by blueroom View Post
        Almost the exact thing just happened to us a couple of weeks ago. We checked the prop, rudder, shaft - everything looked fine. Turns out, the bolts connecting the prop shaft to vdrive had worked themselves loose, almost all were finger tight, causing a pretty severe vibration - almost a shudder when you were at speed and turning. Ours got loose enough that there was concern with the cutlass bearings in the strut possibly being damaged, getting replaced as we speak.

        Point being, there are actually a number of different things that can cause vibrations (struts, bearings, motor mounts, shafts, props, etc.),
        Thanks for chiming in. I dropped off at the dealer yesterday to have them take a look. Hopefully it isnít anything major.


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