Yamaha - Shaft, propeller - 69K-45611-00-00Yamaha Propeller Shaft Lower Unit Drivetrain Component 69K 45611 00 00 Overview The prop shaft is what actually puts power into the water, so when its right, everything feels smooth and solid. You wont notice it much until somethings offthen it shows up as vibration, noise, or uneven performance. These shafts take a beating from load, impact, and constant rotation, especially in rough conditions. When one gets worn or bent, replacing it is key to