90304-ZW5-000 Adjuster Rod Nut - Overview. The 90304-ZW5-000 Adjuster Rod Nut is an essential component in the Honda marine engine systems, specifically within the rigging and accessory system. This part functions to secure and adjust the rod mechanism within the engine's rigging setup, ensuring precise control and mechanical stability. As a genuine OEM part, it is manufactured to exact factory specifications to guarantee seamless integration with existing hardware, maintaining optimum performan