41173-ZY9-000 Speed Sensor Tube - Overview. The 41173-ZY9-000 Speed Sensor Tube is an essential component of Honda marine engine systems, specifically designed to house and protect the speed sensor. It plays a crucial role in supporting the accurate measurement of water speed, which is vital for performance monitoring and control in marine engines. This tube's design ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. The Speed Sensor