30520-PNA-007 Plug Hole Coil - Overview. The 30520-PNA-007 Plug Hole Coil is a critical component of Honda marine engine systems. This spark plug ignition coil generates the high voltage necessary to ignite the fuel-air mixture within the engine cylinders, supporting seamless engine operation. Manufactured to meet Honda's factory specifications, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. This ignition coil serves as the ess