06312-ZVT-801 Smart Key Unit Kit - Overview. The 06312-ZVT-801 Smart Key Unit Kit is a sophisticated accessory designed to upgrade Honda marine engine systems with advanced keyless ignition and remote control functionality. Serving the ignition system, this kit enhances the ease of starting and stopping your outboard motor, providing a modern, convenient solution that integrates cleanly with existing hardware, maintaining optimal performance and durability.. Key Features. Genuine OEM Honda part