Hi everyone, I own a 1995 Kawasaki 900 ZXI, and I am gettin a little prop noise not a knock, more like a light vibration when idleing down. I had an 1100 stx about 6 years ago and it never had that problem. I dont know if it has any spots on the ski itself that may need to be greesed, I know boats have gimble bearings on their lower units. are pwc's the same with bearings? thanks.