Yamaha - Gear - Lower Unit Gear Component - 68S-45560-00-00

Overview

Gears inside the lower unit take a beating, especially if you’re running shallow water, heavy loads, or putting in long hours. When one starts to wear or chip, you’ll hear it before anything else—grinding, slipping, or just not feeling right. This gear is one of those critical pieces that keeps power transferring clean from the engine to the prop. Swap it out with a genuine Yamaha part, and you’re back to smooth, dependable operation.

Key Features

• Precision Gear Machining – Ensures proper meshing with mating gears for smooth power transfer.
• Hardened Gear Construction – Built to withstand high torque and continuous load conditions.
• Direct Yamaha Fitment – Matches original specifications for correct alignment and performance.
• Reliable Power Transmission – Maintains consistent rotation from driveshaft to propeller system.
• Built for Marine Conditions – Designed to handle water intrusion risks and demanding environments.

Engine & Boat Compatibility

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

FAQ

Q: What are signs this gear is failing?
A: Grinding noises, slipping under load, or metal shavings in gear oil are common signs.

Q: Can I replace just this gear or do I need a full rebuild?
A: You can replace a single gear, but it’s smart to inspect all mating components at the same time.

Q: Is gear alignment important during install?
A: Absolutely—improper alignment can cause premature wear or immediate failure.

Q: How often do lower unit gears fail?
A: Usually only after heavy wear, impact damage, or lack of proper lubrication.

Q: Will this fix vibration issues?
A: If worn or damaged gears were the cause, replacing them can restore smooth operation.