87121-ZZ0-000 Rr (90) Mark - Overview. The 87121-ZZ0-000 Rr (90) Mark is a genuine Honda part designed for use in Honda marine engine systems. This rear mark decal serves as an identification emblem indicating its specific location and function on the engine, contributing to clear labeling and component recognition. Manufactured to meet factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. OEM Honda genuine rea