Yamaha - Gear - Lower Unit Drivetrain Component - 68T-45560-00-00

Overview

Gears like this are what keep everything moving smoothly when you’re pushing the boat hard. It’s buried in the lower unit, but it’s constantly taking load every time you throttle up or shift under power. When it’s in good shape, you don’t hear or feel a thing—just smooth acceleration. When it starts to go, you’ll notice noise or roughness pretty quickly, especially under load.

Key Features

• Precision Gear Tooth Design – Delivers smooth engagement and efficient power transfer through the drivetrain.
• Hardened Steel Construction – Built to handle high torque loads and resist long-term wear.
• Balanced Rotation Performance – Helps reduce vibration and maintain steady operation at all speeds.
• OEM Fitment Accuracy – Matches Yamaha specifications for proper alignment within the lower unit.

Engine & Boat Compatibility

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

FAQ

Q: What are the signs of a worn or failing gear?
A: You’ll usually hear whining, grinding, or feel rough operation when accelerating or shifting.

Q: Can I keep running if I hear gear noise?
A: It’s risky. Gear damage tends to get worse fast and can lead to full lower unit failure.

Q: What typically causes gear wear?
A: Lack of proper lubrication, water intrusion, or impact damage are the most common causes.

Q: Is replacing a single gear enough?
A: Not always. It’s best to inspect all mating components since wear usually affects more than one part.

Q: How does saltwater use impact gears?
A: Saltwater itself isn’t the issue, but if seals fail and water gets into the gear oil, it can cause serious damage.

• Supersessions
  60R-G5560-00-00