14442-ZY9-000 Exhaust Rocker Arm B - Overview. The 14442-ZY9-000 Exhaust Rocker Arm B is a critical component in Honda marine engine systems. It plays an essential role in controlling the timing and movement of exhaust valves within the cylinder head, supporting efficient engine operation and exhaust gas management. Designed for seamless integration with existing engine parts, it ensures optimal performance and durability in demanding marine environments.. Key Features. Genuine OEM component man