50158-ZY9-000 Mount Stopper - Overview. The 50158-ZY9-000 Mount Stopper is an essential OEM component designed for Honda marine engine systems. It functions as a mechanical limit or stopper within the rigging assembly, primarily aimed at preventing over-extension or improper mounting positioning. By securely restricting excessive movement, it plays a vital role in protecting connected rigging parts and enhancing overall system reliability. Manufactured to meet the precise factory specifications,