40102-ZVD-000 Case Grommet A - Overview. The 40102-ZVD-000 Case Grommet A is a vital rubber sealing component within Honda marine engine systems. Designed primarily for marine rigging and accessories, it safeguards electrical or mechanical connections from water intrusion, debris, and vibrations, ensuring consistent and reliable engine operation. Crafted to meet exact OEM specifications, it provides seamless integration with existing hardware and equipment, helping maintain optimal marine engine