Yamaha - Gear 1 (27 Tooth) - Lower Unit Gear Component - 69M-G5560-00-00

Overview

Inside the lower unit, everything depends on gears working together clean and tight. This gear is part of that system, transferring power and helping keep everything turning the way it should under load. When gears start to wear, you’ll hear it first—noise, vibration, or rough engagement. It’s not a part you want to take chances on, especially if you rely on your motor to run smooth every time out.

Key Features

• 27 Tooth Gear Design – Provides precise gear ratio and smooth rotational transfer.
• Consistent Power Transmission – Supports reliable torque flow within the lower unit.
• Hardened Gear Construction – Built to handle load stress and long-term wear.
• OEM Fitment Accuracy – Matches Yamaha specifications for proper meshing and alignment.

Engine & Boat Compatibility

Designed for Yamaha outboard lower units using this style of internal gear configuration. Commonly used in small to mid-range Yamaha applications where reliable drivetrain performance is critical.

FAQ

Q: What are signs this gear is worn out?
A: Grinding noise, vibration, or rough shifting are common indicators.

Q: Can a damaged gear affect the whole lower unit?
A: Yes, it can cause additional wear on other gears and components.

Q: Should gears be replaced individually or as a set?
A: It’s often best to inspect all related gears and replace as needed to ensure proper wear patterns.

Q: What usually causes gear damage?
A: Impact, lack of lubrication, or extended wear over time are common causes.

Q: Is installation difficult?
A: It requires internal lower unit work, so proper tools and experience are recommended.

• Supersessions
  6L5-45560-00-00, 6L5-45560-00-00