91303-ZW9-000 O-Ring (31.2X2.4) - Overview. The 91303-ZW9-000 O-Ring (31.2X2.4) is an essential component used in Honda marine engine systems, primarily functioning within the fuel pump assembly to provide a reliable seal. This O-Ring is crafted to exact factory specifications ensuring a perfect fit and effective sealing to prevent fluid or gas leaks, crucial for the smooth operation of your marine engine. Engineered for durability and designed to integrate seamlessly with existing parts, it mai