06311-ZVL-805 Smart Key Unit Kit - Overview. The 06311-ZVL-805 Smart Key Unit Kit is a key accessory for Honda marine engine systems, specifically supporting the key ignition system and enhancing security measures. This smart key unit kit replaces traditional ignition keys, providing a keyless operation system that optimizes convenience and security for boat engine use. Designed to integrate seamlessly with existing Honda marine hardware, it ensures reliable starting performance and secure engin