Yamaha Lower Case Packing 679-45315-A1-00

Overview

When you’re working on a lower unit, sealing it up right is just as important as the internal components. This packing sits where it needs to keep water out and gear oil in, and if it starts to fail, you’ll usually see it in your fluid pretty quickly. It’s not a flashy part, but it’s one that protects everything inside the case. Replacing it at the right time can save you from much bigger repairs down the line.

Key Features

• Critical Sealing Component – Helps prevent water intrusion and oil leakage in the lower unit.
• OEM Fit and Design – Built to Yamaha specifications for proper sealing and alignment.
• Supports Gearcase Protection – Maintains internal lubrication by keeping contaminants out.
• Reliable Replacement Part – Ideal for lower unit service or rebuild applications.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using lower case gear assemblies.

FAQ

Q: What are signs this packing needs replacing?
A: Milky gear oil, leaks, or water intrusion are common signs of a failing seal.

Q: Is this replaced during routine maintenance?
A: It’s usually replaced during lower unit service or when seals are being refreshed.

Q: Can I reuse the old packing?
A: It’s not recommended, as worn packing may not seal properly once removed.

Q: How does saltwater affect this part?
A: Saltwater can accelerate wear, making regular inspection important.

Q: Any installation tips to keep in mind?
A: Make sure surfaces are clean and properly seated to ensure a tight seal.