Yamaha - Propeller Shaft Drivetrain Component 6K1-45611-10-00. Overview. The Yamaha Propeller Shaft 6K1-45611-10-00 is what takes everything your engine puts out and turns it into forward motion. When a shaft starts to wear or gets even slightly bent, you'll feel it right away-vibration, noise, or uneven performance. It's a critical piece inside the lower unit, and once it's compromised, it can affect everything around it. If you're already in there fixing damage, it's worth doing it right with a solid shaft.. Key Features. • Direct Power Transmission - Transfers engine output straight to the propeller for consistent thrust.. • Precision Machined Shaft - Ensures proper alignment and smooth rotation under load.. • High-Strength Construction - Built to handle torque, impact, and long-term use.. • Balanced Operation - Helps reduce vibration and protect surrounding components.. • Superseded Part Update - Replaced by newer version for continued fit and performance support.. Compatibility. C