Yamaha - Lower Unit Assembly - Gearcase Component - 6P2-45300-30-8D

Overview

When a lower unit starts wearing out, you feel it right away—rough shifting, noise, or just a loss of that clean push through the water. I’ve swapped out plenty of these on F250 setups, and a fresh assembly always brings the motor back to life. Everything runs smoother, quieter, and more predictable under load. It’s one of those upgrades that makes the whole boat feel right again.

Key Features

• Complete Gearcase Assembly – Provides a full replacement with matched internal components.
• Smooth Power Transfer – Delivers consistent output to the propeller for reliable performance.
• OEM Precision Fit – Built to Yamaha specifications for proper alignment and installation.
• Corrosion-Resistant Build – Designed to withstand harsh freshwater and saltwater use.

Engine & Boat Compatibility

Designed for Yamaha F series outboard engines, including high-horsepower four stroke models. Commonly used across a range of Yamaha outboards where dependable propulsion and smooth gearcase operation are essential.

FAQ

Q: What are signs this lower unit needs replacing?
A: Grinding noise, vibration, water in gear oil, or poor performance.

Q: Has this part been updated or replaced?
A: Yes, this assembly has been superseded by a newer Yamaha part.

Q: Is this a complete lower unit or internal parts only?
A: It’s a complete assembly ready for installation.

Q: Do I need to add gear oil before running it?
A: Yes, always fill and check gear oil before use.

Q: Can I install this myself?
A: It’s possible with experience, but proper alignment is important.

• Supersessions
  69J-45300-31-8D, 69J-45300-32-8D, 69J-45300-33-8D, 6FJ-45300-12-8D, 6FJ-45300-12-8D, 6P2-45300-31-8D