40106-ZW9-000 Oil Case Grommet B - Overview. The 40106-ZW9-000 Oil Case Grommet B is a crucial rubber seal designed for Honda marine engine oil case systems. It ensures a tight, leak-proof seal that protects the engine's internal components from oil leaks and external contaminants, contributing to the overall reliable operation of Honda marine engines. Its design guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specialized OEM ru