Yamaha - Lower Unit Assembly - Complete Drive System - 697-45300-12-4D

Overview

When a lower unit goes, you feel it right away—noise, poor shifting, or just not running right. This assembly is built to bring everything back to how it should feel on the water, with smooth engagement and solid power transfer. It’s a full setup, so you’re not piecing things together or guessing on internal components. If you’re doing the job, this is the kind of replacement that gets you back out there with confidence.

Key Features

• Complete Lower Unit Assembly – Includes internal components for full power transfer and drive operation.
• Genuine Yamaha OEM Build – Designed to match factory specifications for fit and performance.
• Superseded Component – 697-45300-12-4D has been replaced by 697-45300-12-8D for updated fitment.
• Corrosion Resistant Construction – Built to handle harsh marine environments and extended use.
• Smooth Power Transfer – Supports proper shifting and consistent propulsion on the water.

Engine & Boat Compatibility

Compatible with select Yamaha outboards requiring this lower unit assembly. Always confirm fitment based on your exact engine model.

FAQ

Q: What are signs the lower unit needs replacing?
A: Grinding noise, difficulty shifting, water in gear oil, or loss of propulsion are common signs.

Q: Is this a complete assembly or do I need additional parts?
A: This is a complete lower unit assembly, but always confirm if your setup requires additional hardware.

Q: Has this part been updated or replaced?
A: Yes, this part has been superseded by 697-45300-12-8D.

Q: Can I install this myself?
A: It’s possible if you have experience, but proper alignment and setup are important, so many leave it to a technician.

Q: How does it hold up in saltwater conditions?
A: It’s built for marine use, but regular maintenance and inspection are key for long-term durability.

• Supersessions
  697-45300-11-4D, 697-45300-12-8D, 697-45300-12-8D