The Honda Marine 30590-ZV5-003 Exciter Coil Assembly is an electrical component used in the ignition system of compatible marine equipment. It generates electrical energy through electromagnetic induction as the engine rotates, supplying the voltage required by the ignition system. The coil supports the electrical process needed for spark generation and engine operation. Replacing a f... https://www.wholetoolbox.com/honda-marine-30590-zv5-003-exciter-coil-assembly/30590-ZV5-003.html