This product has been superseded by: 697-45300-12-8D

Yamaha - Lower Unit Assembly - Gearcase & Drive System - 697-45300-11-4D

Overview

On a motor like the Yamaha C55, the lower unit is what keeps your power consistent and your ride smooth. This assembly is built to handle everyday use without hesitation, whether you're cruising, working, or running longer distances. If your current unit is worn or not performing like it should, this replacement brings everything back into line. You’ll notice smoother operation, better response, and that solid feel you expect every time you’re on the water.

Key Features

• Complete Gearcase Assembly – Restores proper power transfer from engine to prop for smooth operation.
• Durable Marine Construction – Built to handle corrosion, wear, and demanding water conditions.
• Reliable Performance – Supports consistent operation across different speeds and loads.
• OEM Yamaha Fitment – Engineered to factory specs for proper alignment and dependable function.

Engine & Boat Compatibility

Compatible with Yamaha C55 outboard models.

FAQ

Q: What are signs the 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 engine performance?
A: If your current unit is worn or damaged, it will restore smooth operation and efficiency.

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

Q: Is this suitable for saltwater use?
A: Yes, it’s built with materials designed to resist corrosion in marine environments.

• Supersessions
  697-45300-12-4D, 697-45300-12-8D, 697-45300-12-8D