Yamaha - Lower Unit Assembly - Gearcase & Drive System - F350 - 6AW-45300-34-8D

Overview

On a V8 like the Yamaha F350, the lower unit is carrying serious load every time you push the throttle forward. This assembly is built to handle that kind of power, delivering smooth, consistent transfer from the engine down to the prop. If your current unit is worn or starting to show signs of failure, this is the kind of replacement that brings everything back into line. You’ll notice it right away—clean shifting, steady performance, and confidence when you're running hard or heading offshore.

Key Features

• Heavy-Duty Gearcase Assembly – Built to handle high horsepower demands from Yamaha V8 outboards.
• Smooth Power Transfer – Ensures efficient delivery of engine power to the propeller.
• Corrosion-Resistant Construction – Designed for durability in both saltwater and freshwater environments.
• OEM Yamaha Fitment – Precision-engineered for proper alignment and reliable operation.

Engine & Boat Compatibility

• F350 - 2014-Current

FAQ

Q: What are signs my lower unit needs replacement?
A: Grinding noise, vibration, shifting issues, or water in the gear oil are common indicators.

Q: Is this a complete lower unit assembly?
A: Yes, it’s a full gearcase assembly designed for direct replacement.

Q: Will this improve performance?
A: If your current unit is worn or damaged, it will restore smooth operation and power transfer.

Q: Is installation difficult?
A: It’s a more advanced repair and typically handled by experienced technicians.

Q: Is this designed for high horsepower engines?
A: Yes, it’s specifically built for Yamaha V8 platforms that require heavy-duty components.

• Engine Application
  • F350 - 2014-Current