Yamaha - Propeller Shaft Drivetrain Component 6K1-45611-11-00. Overview. The Yamaha Propeller Shaft 6K1-45611-11-00 is what actually puts your engine's power into the water, and when it's off, you'll feel it immediately. A bent or worn shaft doesn't just cause vibration-it can take out seals and bearings if you keep running it. I've seen plenty of lower units come apart because this piece got overlooked after an impact. If you're rebuilding or fixing damage, this is one of those parts you don't second-guess.. Key Features. • Direct Power Transfer - Delivers engine torque straight to the propeller for consistent thrust.. • Precision Machined Alignment - Ensures smooth rotation and proper fit within the lower unit.. • High-Strength Construction - Built to handle heavy loads and impact stress.. • Vibration Control Performance - Helps maintain smooth operation and protect surrounding components.. Compatibility. Compatible with select Yamaha outboard engines using this propeller shaft confi