Yamaha - Gear 2 - Lower Unit Drivetrain Component - 6L2-45571-00-00

Overview

When the second gear in the lower unit starts to wear, you’ll feel it in how the motor carries load and shifts under pressure. It’s not always obvious at first, but over time it leads to noise and inconsistent performance. I’ve seen setups where everything else looked fine, but this gear was the weak link. Replacing it brings the drivetrain back to smooth, reliable operation you can count on.

Key Features

• Precision Gear Engagement – Designed for smooth interaction with mating gears under load.
• High-Strength Material – Built to handle continuous torque without premature wear.
• Factory-Spec Machining – Ensures proper fit and alignment within the lower unit.
• Restores Smooth Operation – Helps eliminate noise and uneven power delivery.
• Durable Wear Surface – Engineered to withstand constant contact and rotation.

Engine & Boat Compatibility

Designed for Yamaha outboard engines with compatible lower unit gear systems. Commonly used across small to mid-range outboards on fishing boats, skiffs, and utility vessels. Always confirm part number compatibility before installation.

FAQ

Q: What are signs that Gear 2 is worn out?
A: Noise under load, slipping, or uneven performance during operation are common indicators.

Q: Can this gear affect overall engine performance?
A: Yes, worn gears can reduce efficiency and cause rough operation in the drivetrain.

Q: Is replacing this gear a simple job?
A: It requires opening the lower unit, so it’s typically done during a rebuild or major service.

Q: Should I replace other components at the same time?
A: It’s recommended to inspect bearings, seals, and mating gears while the unit is apart.

Q: How does water intrusion affect this gear?
A: Water reduces lubrication, which can lead to faster wear and possible damage.