17203-ZV4-000 Flame Trap - Overview. The 17203-ZV4-000 Flame Trap is a critical safety component used in Honda marine engine fuel systems. Designed to prevent backfire flames from igniting fuel vapors, this trap flame ensures your Honda marine engine operates safely and reliably. It works by interrupting the flame path within the fuel system, avoiding potential fire hazards and enhancing operational security. The Flame Trap seamlessly integrates with Honda marine ignition and fuel systems to mai