14620-ZW1-000 Inner Rocker Arm - Overview. The 14620-ZW1-000 Inner Rocker Arm is a critical component of Honda marine engine systems. It operates within the valve train to precisely control the opening and closing of engine valves, ensuring reliable engine function. Designed to withstand the mechanical demands of marine environments, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This part is an arm assembly intake rocker, play