91310-ZZ5-003 O-Ring (19.8X2.4) - Overview. The 91310-ZZ5-003 O-Ring (19.8X2.4) is a vital sealing component used in Honda marine engine systems. It plays a crucial role in ensuring a watertight and leak-free connection within the engine's fuel and cooling systems, thereby supporting reliable marine engine operation. Crafted from durable rubber material, this O-ring is engineered for seamless integration with existing parts, maintaining optimal performance and long-lasting durability.. Key Featu