91302-MAL-601 O-Ring (18.1X3.6) - Overview. The 91302-MAL-601 O-Ring (18.1X3.6) is a precision engineered rubber seal essential for Honda marine engine systems. It is designed to create a watertight and airtight seal between mating components within the fuel or fluid systems, thereby helping to prevent leaks and maintain system integrity. This O-Ring ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Designed specifically to match Hon