Yamaha - Gear - Lower Unit Internal Drive Component - 64P-45570-01-00

Overview

When you’re dealing with lower unit issues, gears are usually at the center of it. I’ve opened up plenty of gearcases where one worn gear caused noise, vibration, or worse—total failure. This Yamaha gear is built to mesh clean and handle the load without hesitation. It’s the kind of part you install when you want the lower unit to run quiet and dependable again.

Key Features

• Precision Machined Teeth – Ensures smooth gear meshing and efficient power transfer.
• OEM Fitment – Built to Yamaha specifications for proper alignment within the gearcase.
• High-Strength Construction – Designed to withstand heavy torque and continuous operation.
• Consistent Performance – Helps maintain quiet and reliable lower unit function.

Engine & Boat Compatibility

Fits Yamaha outboard engines that utilize compatible internal lower unit gearing systems. Commonly used on mid- to high-horsepower outboards across offshore, bay, and recreational boats.

FAQ

Q: What are signs of a damaged gear in the lower unit?
A: Grinding noise, vibration, or slipping when in gear are common indicators.

Q: Can I replace just one gear or should I inspect others?
A: You should inspect all related gears—uneven wear can cause issues if only one is replaced.

Q: What causes gears to fail in a lower unit?
A: Low gear oil, contaminated oil, impact damage, or long-term wear under load.

Q: How important is proper lubrication for these gears?
A: It’s critical—clean, properly filled gear oil prevents wear and overheating.

Q: Is gear installation a DIY job?
A: It requires experience with gearcase assembly and proper setup, so it’s best for someone familiar with lower units.

• Supersessions
  64P-45570-00-00