30520-RRA-007 Plug Hole Coil - Overview. The 30520-RRA-007 Plug Hole Coil is an essential ignition component for Honda marine engine systems. This coil functions by generating the necessary high-voltage spark within the spark plug hole to ignite fuel for efficient combustion. Designed specifically for Honda marine use, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM plug hole coil designed for direct ignition i