Yamaha - Shaft, propeller - 69M-G5611-00-00Yamaha Propeller Shaft Lower Unit Drivetrain 69M G5611 00 00 Overview This is the part that takes everything your engine puts out and turns it into forward motion. When the shaft is straight and running true, you get smooth performance with no vibration and solid push through the water. But once its even slightly off, youll feel it right awayespecially at speed. Its built to handle real use, whether you're cruising easy or putting the motor to work.