91452-ZW9-000 Stopper Ring - Overview. The 91452-ZW9-000 Stopper Ring is a critical component within Honda marine engine systems, specifically supporting the stopper ring system. This small but vital ring functions as a retainer to prevent other parts from moving beyond designated points, ensuring the assembly operates reliably and efficiently. Designed to factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. O