J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Prop Rattle

Make sure it isn't the transmission slipping. I had that happen on Rhapsody. We thought it was the Martec prop, rebuilt it and same thing occured. Turned out the clutch was worn resulting in "chatter" on the shaft. We thought it was the prop sticking and not opening fully. A transmission rebuild where they changed the seating surface on the conical clutch face fixed the problem.