91301-PC9-003 O-Ring (7.7X2.3) - Overview. The 91301-PC9-003 O-Ring (7.7X2.3) is a critical sealing component used within Honda marine engine systems and automotive applications such as Accord, CR-V, Odyssey, and Pilot models. This O-Ring functions as a precise seal to prevent leakage of fluids or gases between connected components, thus maintaining system integrity and operational reliability. Designed to match exact factory dimensions, it ensures seamless integration with existing parts, maint