Yamaha - Gear 2 (28T) - Lower Unit Internal Drive Component - 64P-45570-10-00

Overview

When you’re inside a lower unit, every gear matters, especially ones that take the load day in and day out. I’ve seen a single worn gear throw off the whole system—noise, vibration, or worse. This 28-tooth gear is built to mesh clean and keep everything turning the way it should. It’s one of those parts you replace right so you don’t have to tear it back down later.

Key Features

• 28-Tooth Gear Design – Precisely cut teeth ensure proper meshing and smooth rotation.
• OEM Fitment – Built to Yamaha specifications for exact alignment within the gearcase.
• High-Strength Construction – Designed to handle heavy torque and continuous operation.
• Consistent Performance – Helps maintain quiet and reliable lower unit operation.

Engine & Boat Compatibility

Fits Yamaha outboard engines that utilize compatible internal lower unit gearing systems. Commonly used on mid- to high-horsepower outboards across offshore boats, bay boats, and recreational vessels.

FAQ

Q: What are signs this gear is worn or damaged?
A: Grinding noise, vibration, or slipping under load are common signs.

Q: Can I replace just this gear or should I check others?
A: You should always inspect related gears—uneven wear can cause issues if only one is replaced.

Q: What causes gear wear in a lower unit?
A: Low or contaminated gear oil, heavy load use, or impact damage are common causes.

Q: How important is proper gear oil for this component?
A: It’s critical—clean, properly filled gear oil keeps gears lubricated and prevents premature wear.

Q: Is this a difficult part to install?
A: It requires experience with gearcase assembly and proper setup, so it’s best handled by someone familiar with lower units.