This product has been superseded by: 65J-45300-22-8D

Yamaha - Lower Unit Assembly 225-250 HP - Drivetrain Component - 65J-45300-21-8D

Overview

When you’re dealing with these bigger Yamaha V6 outboards, a worn lower unit shows up fast—hard shifting, noise, or loss of power to the prop. This assembly is built to bring everything back to smooth, dependable operation, especially on 225 and 250 horsepower setups. It’s designed for engines that see real use, whether that’s long runs offshore or heavy load days. Once it’s installed, you’ll feel the difference right away in how clean and responsive the motor runs.

Key Features

• Smooth Power Transfer – Delivers consistent propulsion from engine to propeller.

• OEM Yamaha Fitment – Built to factory specs for proper alignment and installation.

• Heavy-Duty Gearcase Design – Handles high horsepower loads and demanding marine use.

• Corrosion-Resistant Construction – Designed to perform in harsh saltwater and freshwater conditions.

Engine & Boat Compatibility

• Compatible with Yamaha 225-250 HP outboards

FAQ

Q: What are signs the lower unit needs replacement?
A: Grinding noise, slipping gears, or water in the gear oil are common signs.

Q: Can I rebuild instead of replacing it?
A: Minor wear can be repaired, but major internal damage usually makes replacement more reliable.

Q: Will this improve performance immediately?
A: Yes, you’ll notice smoother shifting and more consistent power delivery after installation.

Q: Is this suitable for saltwater use?
A: Yes, just keep up with flushing and gear oil maintenance to extend its life.

• Supersessions
  65J-45300-20-8D, 65J-45300-22-8D, 65J-45300-23-8D, 65J-45300-23-8D