Yamaha - Shaft, Propeller - Lower Unit Component - 679-45611-01-00

Overview

When you’re 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 it’s bent or worn, you’ll feel it immediately. I’ve seen slight bends cause noticeable vibration and long-term damage if left alone. When it’s straight and solid, power transfer is smooth and the boat runs the way it should.

Key Features

• Direct Power Transfer – Connects the gearcase to the propeller for efficient propulsion.
• Genuine Yamaha Fitment – Designed to match factory lower unit specifications precisely.
• Smooth Rotation Performance – Helps reduce vibration and ensures steady operation.
• High Strength Construction – Built to handle torque, load, and continuous use.
• Precision Machined Design – Ensures proper alignment within the lower unit.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using this propeller shaft. Verify fitment based on your specific engine model.

FAQ

Q: What are signs of a damaged prop shaft?
A: Vibration, noise, or uneven performance when running the boat.

Q: Can a bent shaft affect performance?
A: Yes, it can cause vibration and reduce efficiency.

Q: Is this part inside the lower unit?
A: Yes, it’s part of the internal gearcase system.

Q: Is replacement difficult?
A: It can be involved and usually requires lower unit disassembly.

Q: Can hitting something damage the shaft?
A: Yes, impacts with debris or the bottom can bend or damage it.