91305-422-000 O-Ring (9.8X2.4) - Overview. The 91305-422-000 O-Ring (9.8X2.4) is a crucial sealing component designed for Honda marine engine systems. This O-Ring measures 9.8mm inner diameter by 2.4mm thickness, ensuring a watertight seal within specific marine engine subsystems to prevent leaks and maintain system integrity. Manufactured as a genuine OEM Honda part, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precisely