Yamaha - Gear Set - Lower Unit Gear Set - 6CF-45550-00-00

Overview

When you’re rebuilding a Yamaha lower unit, the gear set is where everything either comes together or falls apart. If one gear is worn, it usually affects the whole system, and you’ll feel it in noise, shifting, and overall performance. I’ve worked on units where replacing the full gear set brought everything back to smooth, quiet operation. When it’s right, the drivetrain runs clean and you can trust it under load.

Key Features

• Complete Gear Set Configuration – Includes matched gears designed to work together for smooth operation.
• Precision-Cut Gear Teeth – Ensures proper meshing to reduce noise and vibration.
• High-Strength Construction – Built to handle torque and continuous load in marine conditions.
• Consistent Power Transfer – Supports efficient movement of power through the lower unit.
• Factory-Spec Fitment – Designed to meet Yamaha tolerances for proper alignment and performance.

Engine & Boat Compatibility

Designed for Yamaha outboard lower units requiring a complete gear set. Suitable for mid to high horsepower applications across recreational, offshore, and working boats.

FAQ

Q: When should I replace the full gear set instead of one gear?
A: If multiple gears show wear or damage, replacing the full set ensures proper alignment and performance.

Q: What are signs the gear set is worn out?
A: Grinding noise, rough shifting, vibration, or metal in the gear oil are common signs.

Q: Can a worn gear set damage other components?
A: Yes, it can lead to further wear inside the lower unit if not addressed.

Q: Is installation complex?
A: Yes, it requires proper tools and experience to set clearances and alignment correctly.

Q: How can I extend the life of the gear set?
A: Regular gear oil changes and checking for water intrusion help prevent premature wear.