Clarke, my V210 also does it out of the hole when turned slightly and especially when turning the boat a certain way (can't remember which way) out of the hole. At one point I discovered that my prop nut was slightly loose causing some of the rattling. After tightening it up, the vibrating was almost completely went away. Check that. For me, the vibrating sound is mostly up at the helm, coming all the way up the cable.
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