Yamaha - Gear 2 - Lower Unit Gear Component - 61A-45571-00-00

Overview

When internal gears start wearing down, it doesn’t take long before you notice rough operation or slipping under load. Gear 2 plays a key role in keeping everything inside the lower unit turning smoothly and staying in sync. It handles constant pressure every time you’re on the throttle, especially in higher horsepower setups. Replacing it during a rebuild helps bring back smooth operation and keeps the rest of the drivetrain from taking unnecessary wear.

Key Features

• Precision Gear Function – Works with mating gears to maintain smooth rotation and proper drivetrain timing.

• Consistent Power Transfer – Helps deliver steady torque through the lower unit without slipping.

• Heavy-Duty Construction – Built to handle continuous load and high-speed rotation in marine conditions.

• OEM Fit and Alignment – Designed to match Yamaha specifications for proper placement within the gearcase.

Engine & Boat Compatibility

Compatible with select Yamaha outboard lower units. Always verify fitment using your engine model and service manual before installation.

FAQ

Q: What are signs this gear is worn or damaged?
A: Grinding noises, slipping under load, or metal shavings in gear oil are common signs.

Q: Can I replace just this gear without a full rebuild?
A: It requires full lower unit disassembly, so it’s typically done during a rebuild.

Q: Will this affect shifting performance?
A: Yes, worn gears can lead to rough engagement and inconsistent performance.

Q: What causes this gear to wear out?
A: Low gear oil, water intrusion, or heavy impact damage are the most common causes.

Q: Should I inspect other components when replacing it?
A: Absolutely—bearings, seals, and mating gears should all be checked to avoid repeat issues.