91301-ZG3-000 O-Ring (42.2X2.4) - Overview. The 91301-ZG3-000 O-Ring (42.2X2.4) is a crucial genuine OEM component designed for Honda marine engine systems. Serving as an essential sealing element within the water pump and impeller system, it prevents water leakage and air ingress, ensuring the engine operates reliably and efficiently. Crafted to meet precise factory specifications, this O-Ring integrates seamlessly with existing parts, maintaining optimal performance and durability over time..