Yamaha - Gear - Lower Unit Drivetrain Component - 68T-45571-00-00

Overview

This is one of those gears that takes constant load every time you’re on the throttle. It’s buried inside the lower unit, but it’s doing the heavy lifting when it comes to transferring power cleanly to the water. When everything’s right, you won’t hear a thing—just smooth, steady performance. When it starts to wear, though, it shows up fast with noise or rough operation you can’t ignore.

Key Features

• Precision Gear Tooth Profile – Designed for smooth engagement and efficient power transfer under load.
• Hardened Steel Build – Handles high torque and repeated stress without premature wear.
• Balanced Operation Design – Helps reduce vibration and maintain consistent drivetrain performance.
• OEM Fitment Accuracy – Matches Yamaha specifications for proper alignment and dependable operation.

Engine & Boat Compatibility

Yamaha Outboard Models – Varies by application (confirm by part number)

FAQ

Q: What are the early signs of gear wear?
A: You’ll usually hear whining or grinding, especially when accelerating or under load.

Q: Can gear damage spread to other components?
A: Yes, worn gears often affect bearings and mating gears, so it’s important to inspect everything.

Q: What causes gears to fail in the lower unit?
A: Water intrusion, poor lubrication, or impact damage are the most common reasons.

Q: Is it okay to keep running with slight gear noise?
A: It’s risky. Small issues can turn into major failures pretty quickly.

Q: Does regular maintenance help extend gear life?
A: Absolutely. Keeping clean gear oil and checking seals goes a long way in preventing damage.

• Supersessions
  60R-G5571-00-00