06311-ZVT-801 Smart Key Unit Kit - Overview. The 06311-ZVT-801 Smart Key Unit Kit is a crucial replacement component designed for the smart key system used in Honda marine engine systems. This kit supports keyless ignition functionality, allowing for convenient and secure engine start/stop operations without the need for a traditional key. By restoring the smart key system, this unit kit ensures reliable performance and seamless integration with existing engine hardware, maintaining optimal dura