91351-ZW1-B02 O-Ring (94X4.1) - Overview. The 91351-ZW1-B02 O-Ring (94X4.1) is a crucial sealing component within Honda marine engine systems. This specially sized rubber O-ring is designed to provide a watertight and airtight seal in critical assemblies, preventing leaks and ensuring the proper operation of the marine engine. As a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisely sized O-ring (94x4.1 m