Yamaha - Propeller Shaft Lower Unit Drivetrain Component 6CB-45611-00-00. Overview. If there's one part in the lower unit that takes a beating, it's the prop shaft. It's handling every bit of power coming out of the engine and transferring it straight to the prop. I've seen these get bent from a single impact or worn over time from hard use, and once that happens, you'll feel vibration or notice performance drop off fast. A solid, true shaft brings everything back to smooth, balanced operation.. Key Features. • Direct Power Transfer - Delivers engine output straight to the propeller with minimal loss.. • Precision Machined Shaft - Ensures proper alignment and reduces vibration under load.. • OEM Fit Accuracy - Matches Yamaha factory specs for correct installation and performance.. • High Strength Construction - Built to handle torque, impact, and continuous marine use.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before ins