13323-P8A-A01 Main (Upper) Brg C - Overview. The 13323-P8A-A01 Main (Upper) Brg C is an essential upper main bearing used in Honda marine engine systems. This part plays a crucial role in supporting the crankshaft within the engine, ensuring smooth mechanical motion and reliable engine operation. Engineered to meet factory specifications and tolerances, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This is a Grade C upper m