40105-ZV3-000 Case (Lower) Grom - Overview. The 40105-ZV3-000 Case (Lower) Grom serves as a critical protective and sealing component within Honda marine engine systems. Specifically designed for the lower housing assembly, this grommet provides cushioning and sealing to prevent water intrusion and debris contamination, thereby supporting the engine's reliable and smooth operation. Manufactured to strict factory specifications, it ensures seamless integration with existing parts, maintaining opt