87121-ZVT-000 Rr (150) Mark - Overview. The 87121-ZVT-000 Rr (150) Mark is a crucial identification component used in Honda marine engine systems. This mark supports the visual identification system on the engine's rear, ensuring precise model recognition and aiding in maintenance and service. Designed to meet Honda's exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda Identification M