40106-ZY1-870 Oil Case Grommet B - Overview. The 40106-ZY1-870 Oil Case Grommet B is a crucial component in Honda marine engine systems. It functions as a seal within the oil case assembly to prevent oil leaks and absorb vibrations, ensuring reliable engine operation. Designed to meet exact factory specifications, this grommet integrates seamlessly with the oil case, maintaining optimal performance and durability of your Honda marine engine.. Key Features. Genuine OEM Honda component designed sp