Yamaha - Gear - Lower Unit Gear Component - 63P-45560-01-00

Overview

When you’re inside a lower unit, the gears are what everything depends on to stay smooth and reliable. I’ve seen engines come in with noise or vibration that traced back to a single worn gear starting to break down. Once that happens, it doesn’t take long for the rest of the system to feel it. Replacing it with the right Yamaha gear keeps everything meshing clean and running the way it should.

Key Features

• Precision Gear Teeth – Designed for smooth engagement and efficient power transfer.
• OEM Fitment – Built to Yamaha specifications for exact compatibility within the gearcase.
• High-Load Durability – Engineered to handle torque and continuous marine operation.
• Reduced Noise Operation – Helps maintain quiet and stable 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 damaged?
A: Grinding noise, vibration, or slipping during operation are common indicators.

Q: Can a single worn gear affect the whole lower unit?
A: Yes, it can lead to uneven wear and damage other internal components.

Q: Should gears be replaced as a set?
A: In many cases, yes—it helps ensure proper alignment and long-term reliability.

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

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

• Supersessions
  63P-45560-00-00