Yamaha - Gear - Lower Unit Component - 650-42152-00-94

Overview

When something feels off in the lower unit, a worn gear is often part of the problem. I’ve opened up plenty of units where a single gear started making noise and ended up affecting everything around it. These parts take constant load, so once wear sets in, it doesn’t take long before performance drops. Keeping a solid gear in place helps your motor stay smooth, quiet, and dependable out on the water.

Key Features

• Reliable Power Transfer – Helps move engine power efficiently through the lower unit.
• Precision Cut Teeth – Designed for smooth engagement and reduced internal wear.
• High-Strength Construction – Built to handle torque, load, and continuous operation.
• Direct Fit Design – Matches Yamaha specifications for proper alignment and installation.
• Supports Smooth Operation – Helps maintain consistent and quiet drivetrain performance.

Engine & Boat Compatibility

• Designed for Yamaha outboard engines with gear-driven lower units
• Compatible with a range of small to mid-range horsepower models
• Suitable for both freshwater and saltwater applications
• Commonly used in lower unit repair and rebuilds

FAQ

Q: What are the signs of a worn gear?
A: Grinding noise, vibration, or rough operation are common indicators.

Q: Can one damaged gear affect the rest of the unit?
A: Yes, it can lead to additional wear or damage to nearby gears and bearings.

Q: What usually causes gear failure?
A: Low gear oil, contamination, or impact with debris are common causes.

Q: Is this a repair I can do myself?
A: It’s a more advanced repair that usually requires lower unit experience.

Q: Does saltwater use affect internal gears?
A: Indirectly—proper sealing and maintenance help prevent corrosion and extend gear life.

WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

• Supersessions
  650-42152-00-00