[C320-list] noise at 1800

[jim brown]

Had the boat hauled while we were on vacation for a week to have the bottom cleaned and repainted. While it was out I had the two blade prop changed to a three blade (my wife is at the helm and wanted more reverse power-I know it's slower-she doesn't care), the cutlass bearing replaced (10 years on the original) and the stuffing gland redone with Gortex packing. When taking the boat back to our marina we noticed a high pitched screeching sound only at 1800 to 2200 rpm. Go below 1800 and above 2200 and no vibration and quiet. No noise at the dock in neutral throughout the rpm range. Can't really locate the noise except it doesn't seem to be coming from the transmission or the packing gland (and that is cool after half hour of motoring), and it seems a little louder in the aft lazarette.   Any suggestions? Is there an upper bearing in the stuffing box that might need attention?

Jim Brown  Desafinado 973



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