This product has been superseded by: 6EE-G5300-00-8D

Yamaha - Lower Unit Assembly - Gearcase Component - 6BX-G5300-01-4D

Overview

When a lower unit starts giving trouble, you’ll feel it right away—vibration, noise, or just not pushing like it should. This assembly is what takes all that engine power and turns it into clean movement in the water. I’ve swapped out worn units where the difference was night and day once everything was running true again. A solid lower unit like this brings back that smooth, confident feel when you throttle up.

Key Features

• Efficient Power Transfer – Delivers engine output smoothly to the propeller for reliable propulsion.

• Precision Gear Alignment – Ensures clean engagement and reduces internal wear.

• OEM Fit Accuracy – Matches Yamaha factory specs for proper installation and performance.

• Corrosion Resistant Construction – Built to handle harsh marine environments including saltwater use.

Engine & Boat Compatibility

Verify compatibility with your specific Yamaha outboard model and part number before installation.

FAQs

Q1: What are signs this lower unit needs replacing?
A: Grinding noise, vibration, water in gear oil, or loss of power are common signs.

Q2: Can I rebuild instead of replacing it?
A: Sometimes, but if damage is extensive, a full replacement is often more reliable.

Q3: Does this come fully assembled?
A: Yes, it’s designed as a complete unit for direct replacement.

Q4: Will this improve performance right away?
A: If your old unit was worn, you’ll notice smoother operation immediately.

Q5: Is this suitable for saltwater use?
A: Yes, it’s built to handle corrosion from regular saltwater exposure.

• Supersessions
  6BX-G5300-00-4D, 6EE-G5300-00-4D, 6EE-G5300-00-8D, 6EE-G5300-00-8D