Yamaha - Lower Case Packing Lower Unit Sealing Component 6EE-G5315-00-00. Overview. Packing like this is one of those parts you don't see once everything's buttoned up, but it's doing important work the whole time. I've seen lower units come apart because of leaks that started with worn or flattened packing. It helps keep water out and oil where it belongs, especially in smaller gearcases. When it's fresh and installed right, the lower unit stays sealed and protected.. Key Features. • Lower Unit Seal Support - Helps maintain proper sealing within the lower case assembly.• Leak Prevention Design - Reduces the risk of water intrusion and gear oil loss.• Durable Sealing Material - Built to withstand pressure, heat, and constant exposure to water.• Precision Fit Profile - Designed to align correctly within Yamaha lower unit components.• Direct Yamaha Replacement - Matches factory specifications for reliable installation and performance.. Engine & Boat Compatibility. Designed for Yamaha out