Yamaha - Gear - Lower Unit Drivetrain Component - 69L-45571-00-00

Overview

Inside the lower unit, gears are constantly working under load, especially when you’re shifting or running at speed. When everything’s in good shape, it’s quiet, smooth, and you don’t think twice about it. But once a gear starts wearing down, you’ll feel it with vibration or hear it right away. It’s one of those parts you replace to keep the drivetrain tight and avoid bigger issues down the line.

Key Features

• Precision Gear Engagement – Designed to mesh cleanly with mating gears for smooth operation.
• Consistent Power Transfer – Helps deliver steady torque from engine to propeller.
• Hardened Gear Construction – Built to handle load stress and long-term wear.
• OEM Fitment Accuracy – Matches Yamaha specifications for proper alignment and function.

Engine & Boat Compatibility

Designed for Yamaha outboard lower units using this style of internal gear component. Commonly used across mid-range Yamaha applications where reliable drivetrain performance is essential.

FAQ

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

Q: Can a worn gear damage other parts?
A: Yes, it can cause uneven wear and damage to surrounding gears.

Q: Should I replace gears individually or as a set?
A: It’s best to inspect all related gears and replace worn components together if needed.

Q: What usually causes gear damage?
A: Impact, lack of lubrication, or long-term wear are the main causes.

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