91358-ZW4-H11 O-Ring (3.5X41.7) - Overview. The 91358-ZW4-H11 O-Ring (3.5X41.7) is a precision-engineered sealing component used within Honda marine engine systems. This O-Ring plays a crucial role in maintaining the integrity of mechanical seals, preventing fluid leaks, and ensuring efficient operation of the engine's systems. Made to factory specifications, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Specific size O-Rin