06311-ZVL-804 Smart Key Unit Kit - Overview. The 06311-ZVL-804 Smart Key Unit Kit is a crucial component for Honda marine engine systems, enabling keyless ignition and enhanced control functionality. It replaces traditional ignition keys with a smart key fob, allowing boaters to start and operate their marine engines effortlessly. Designed to maintain reliability and ensure smooth operation, this unit integrates seamlessly with existing Honda marine equipment, providing optimal performance and d