30500-ZW9-013 Ignition Coil Assembly - Overview. The 30500-ZW9-013 Ignition Coil Assembly is an essential component of Honda marine engine systems. It supports the ignition system by generating the high voltage spark necessary for reliable fuel combustion and engine start-up. This critical part ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. High-quality ignition coil designed to deliver precise electrical pulses to spark plugs for