Yamaha - Shaft,propeller - 679-45611-01-00Yamaha Shaft, Propeller Lower Unit Component 679 45611 01 00 Overview When youre dealing with vibration or power loss at the prop, the prop shaft is one of the first things I look at. This is what transfers all that engine power straight to the prop, so if its bent or worn, youll feel it immediately. Ive seen slight bends cause noticeable vibration and long term damage if left alone. When its straight and solid, power transfer is smooth and the boat