40105-ZW9-832 Oil Case Grommet A - Overview. The 40105-ZW9-832 Oil Case Grommet A is a crucial rubber seal designed specifically for Honda marine engine systems. It plays an essential role in sealing the oil case and preventing oil leaks, thereby maintaining the engine's integrity and reliable operation. Engineered to factory specifications, this grommet ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed as a rubber seal for