13342-P8A-A01 Main (Lower) Brg B - Overview. The 13342-P8A-A01 Main (Lower) Brg B is a critical component in Honda marine engine systems. As a lower main bearing, it supports the crankshaft's rotation within the engine block, ensuring smooth mechanical operation and reducing friction. Designed to maintain optimal engine performance and reliability, this part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM lower main bea