87121-ZV7-F01 Rr (25) Mark - Overview. The 87121-ZV7-F01 Rr (25) Mark is a genuine Honda marine part designed for use in the marine marking system of Honda marine engine systems. This rear mark serves as a precise identifier for 25 horsepower class engines or components, helping maintain clear and reliable system identification. Manufactured to meet exact factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM rear mark element, specific to 25 horsepower marine engines.. Ensures precise and durable identification marking for marine engine systems.. Manufactured to match original factory specifications, dimensions, and tolerances.. Allows easy integration with existing engine hardware and seals.. Contributes to maintaining system reliability and professional appearance of the engine.. Designed to endure marine environments with resistance to corrosion and wear.. Why Choose Genuine OEM.