Yamaha - Gear - Lower Unit Gear Component - 63P-45560-02-00

Overview

When you’re inside a lower unit, gears are where everything either works perfectly or starts to fall apart. I’ve seen engines come in with noise or vibration that traced back to a single worn gear starting to fail. Once that wear begins, it spreads fast through the rest of the gear set. Swapping in a proper Yamaha gear like this keeps everything running smooth and tight where it matters.

Key Features

• Precision-Cut Gear Teeth – Designed for smooth engagement and efficient power transfer.
• OEM Fitment – Built to Yamaha specifications for exact gearcase compatibility.
• High-Strength Construction – Handles torque and continuous marine operation.
• Stable Operation – Helps reduce vibration and maintain consistent lower unit performance.

Engine & Boat Compatibility

Fits Yamaha outboard engines equipped with compatible lower unit gearcases. Commonly used on mid-range horsepower outboards across center consoles, bay boats, and recreational vessels.

FAQ

Q: What are signs this gear is worn or failing?
A: Grinding noise, vibration, or slipping under load are common signs.

Q: Can one bad gear damage other components?
A: Yes, it can cause uneven wear and lead to failure in other gears.

Q: Should gears be replaced together?
A: Often yes, especially if there’s visible wear across the gear set.

Q: How does water intrusion affect this gear?
A: It can cause corrosion and reduce lubrication, leading to faster wear.

Q: Is installation difficult?
A: It requires proper setup inside the gearcase, usually done during a rebuild.