30410-ZY6-030 Case Assembly - Overview. The 30410-ZY6-030 Case Assembly is an essential component in Honda marine engine systems. This OEM part functions as a protective housing that supports electronic parts within the system, ensuring protection and seamless operation. Designed to fit within Honda's marine engine electronics, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda Case Assembly designed to factory sp