30500-ZY1-013 Ignition Coil Assembly - Overview. The 30500-ZY1-013 Ignition Coil Assembly is a vital component of Honda marine engine systems. It is responsible for generating the high-voltage spark needed to ignite the fuel inside the engine's cylinders, which drives the combustion process. Designed to work seamlessly within the ignition system, it ensures reliable engine startup and smooth running. Built to OEM specifications, this ignition coil assembly integrates flawlessly with existing par