91354-ZW4-H11 O-Ring (2.0X45.5) - Overview. The 91354-ZW4-H11 O-Ring (2.0X45.5) is a critical sealing component in Honda marine engine systems. This O-ring supports vital sealing functions within the fuel and hydraulic systems, ensuring reliable containment and preventing fluid leaks. Its precise 2.0mm cross-section and 45.5mm outer diameter enable seamless integration with factory components, maintaining optimal engine performance and durability.. Key Features. Genuine OEM Honda O-ring designed