Yamaha - Gear - Lower Unit Component - 68U-45571-00-00

Overview

The gear is a critical internal component of your Yamaha outboard’s lower unit, responsible for transferring engine power to the propeller through the gearcase. Designed with precision-cut teeth, this gear works in conjunction with other internal gears to ensure smooth rotation, efficient power transfer, and reliable shifting between forward, neutral, and reverse. If a gear becomes worn, chipped, or damaged, it can lead to grinding noises, poor performance, or drivetrain failure. Replacing it helps restore proper operation and keeps your lower unit functioning efficiently.

Key Features

• Power Transfer Component – Helps transmit engine power to the propeller.
• Precision Gear Design – Engineered for smooth engagement and efficient operation.
• OEM Yamaha Construction – Manufactured to factory specifications for durability and exact fit.
• Lower Unit Internal Part – Designed for integration within the gearcase assembly.

Engine & Boat Compatibility

Compatible with Yamaha outboards using this gear within the lower unit / gearcase assembly.

FAQ

Q: What does this gear do?
A: It transfers rotational power within the lower unit to drive the propeller.

Q: What are signs this gear is worn or damaged?
A: Grinding noise, vibration, slipping, or difficulty shifting.

Q: Is this part inside the lower unit?
A: Yes, it is an internal gear within the gearcase.

Q: Is this a high-wear component?
A: It can wear over time, especially if lubrication is poor or water contamination occurs.

Q: Is installation difficult?
A: Yes, it requires disassembly of the lower unit and is typically done by experienced technicians.