91319-PR3-003 O-Ring (13X1.5) - Overview. The 91319-PR3-003 O-Ring (13X1.5) is a vital sealing component designed to support Honda marine engine systems. This rubber O-ring, with an outer diameter of 13mm and a cross-section of 1.5mm, serves as an essential sealing element that prevents fluid and pressure leaks within the engine or fluid systems. Engineered as a genuine OEM component, it ensures seamless integration with existing parts, maintaining optimal performance and durability, and conform