14420-ZZ0-000 Rocker Arm Assembly - Overview. The 14420-ZZ0-000 Rocker Arm Assembly is a crucial component within Honda marine engine systems, specifically supporting the valve train. It plays an essential role in converting the motion of the pushrod into movement that opens and closes the engine's intake and exhaust valves, thereby enabling reliable combustion. Designed as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. K