Yamaha - Lower Unit Assembly - Gearcase Component - F4 F6 - 6EE-G5300-00-8D

Overview

The Yamaha Lower Unit Assembly | 6EE-G5300-00-8D is what keeps your small outboard putting power into the water the way it should. On F4 and F6 motors, even a small issue in the lower unit shows up fast—rough rotation, noise, or weak push. This assembly handles everything from gear transfer to prop output, so it needs to stay tight and aligned. If your motor isn’t running as smooth as it used to, this is often the fix that brings it back.

Key Features

• Efficient Power Transfer – Delivers engine output smoothly to the propeller for consistent performance.

• OEM Fit Precision – Built to Yamaha specifications for proper alignment and easy installation.

• Complete Gearcase Assembly – Pre-assembled unit for straightforward replacement and dependable operation.

• Corrosion-Resistant Construction – Designed to withstand freshwater and saltwater environments.

Engine & Boat Compatibility

• F4 2016-Current
• F6 2016-Current

FAQs

Q1: What are signs the lower unit is failing?
A: Grinding noise, vibration, or reduced propulsion are common indicators.

Q2: Can I repair instead of replacing it?
A: Minor issues can be repaired, but full replacement is usually more reliable.

Q3: Does this come ready to install?
A: Yes, it’s a complete assembly designed for direct replacement.

Q4: Is this important for small engines like F4 and F6?
A: Absolutely, since efficiency and smooth operation are critical on smaller motors.

Q5: Is installation difficult?
A: It’s generally straightforward with basic tools and proper alignment.

• Supersessions
  6EE-G5300-00-4D, 6BX-G5300-01-4D, 6BX-G5300-00-4D
• Engine Application
  • F4 - 2016 to Current
  • F6 - 2016 to Current