91452-ZVD-000 Stopper Ring - Overview. The 91452-ZVD-000 Stopper Ring is a small but crucial component within Honda marine engine systems. Its main role is to act as a stopper or retainer, preventing unwanted movement within the engine assembly. This retention function is vital for ensuring the system operates smoothly and reliably. As a genuine OEM part, it is manufactured to meet Honda's exacting standards, with precise dimensions and tolerances for a perfect factory fit. This ensures seamless