Yamaha Gear - Lower Unit Drivetrain Component - 67F-45571-00-00

Overview

When something feels off in the lower unit—noise, vibration, or inconsistent power transfer—the gears are always worth checking. I’ve torn down enough gearcases to know that even small wear on a gear can affect how everything runs. This gear plays a role in transferring power smoothly through the drivetrain. When it’s in good shape, everything meshes clean and the engine runs quiet and steady.

Key Features

• Power Transfer Function – Helps transmit engine power through the lower unit drivetrain.
• Genuine Yamaha Fitment – Designed to match factory gearcase specifications precisely.
• Smooth Gear Engagement – Supports quiet and efficient operation when properly aligned.
• High Strength Construction – Built to handle torque, load, and continuous operation.
• Precision Machined Design – Ensures accurate fitment within the gear assembly.

Engine & Boat Compatibility

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

FAQ

Q: What are signs of a worn gear in the lower unit?
A: Grinding noise, vibration, or reduced performance are common signs.

Q: Can a damaged gear affect overall engine performance?
A: Yes, it can impact power transfer and lead to further drivetrain issues.

Q: What causes gear wear in the lower unit?
A: Normal use, lack of lubrication, or contamination can cause wear over time.

Q: Is replacing this gear a complex repair?
A: It usually requires full lower unit disassembly and proper setup.

Q: Can I continue using the engine with a worn gear?
A: It’s not recommended, as it can lead to more serious damage.