This product has been superseded by: 66K-45300-12-NA

Yamaha - Lower Unit Assembly 200-225 HP - Drivetrain Component - 66K-45300-11-NA

Overview

When a lower unit goes out on these bigger V6 Yamahas, it’s not something you ignore—it shows up fast in how the boat runs and shifts. This lower unit assembly is built to bring everything back in line, from smooth gear engagement to steady power delivery. It’s designed for 200 and 225 horsepower setups where reliability really matters, especially if you’re running offshore or putting hours on the motor. Bolt it up right, and you’re back to clean, dependable performance.

Key Features

• Consistent Power Transfer – Delivers smooth propulsion from engine to propeller.

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

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

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

Engine & Boat Compatibility

• VX200 2003-2005
• VX225 2003-2004

FAQ

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

Q: Can I rebuild instead of replacing the lower unit?
A: Minor issues can be repaired, but major damage usually makes full replacement more reliable.

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

Q: Is this suitable for saltwater use?
A: Yes, just keep up with flushing and gear oil maintenance to protect it long term.

• Supersessions
  66K-45300-10-NA, 66K-45300-12-NA, 66K-45300-13-NA, 66K-45300-13-NA
• Engine Application
  • VX200 - 2003 to 2005
  • VX225 - 2003 to 2004