Sierra Upper Casing Gasket Replaces Yamaha Gaskets & Seals

The Sierra Upper Casing Gasket is an aftermarket replacement gasket for Yamaha outboard lower unit and drive housing applications. It seals the upper casing (also called the exhaust housing or upper unit casing) mating surface. This helps keep water, exhaust and lubricants where they belong. Sierra designs it as a direct replacement for the matching Yamaha OEM part.

Key Features:

• Made as a replacement for the corresponding Yamaha OEM upper casing gasket
• Seals the joint between the upper casing and adjoining housing surfaces
• Built for the marine environment, including exposure to water, heat and lubricants
• Engineered by Sierra to fit and function like the original part
• Each part number cross-references to a specific Yamaha OEM number

Sierra International is a well-known marine engine parts brand. Replacing a worn or damaged upper casing gasket during service helps maintain a proper seal and protect your outboard's internal components.