This Genuine Tohatsu Marine Part is an ignition coil, specifically designed as #1 in the ignition system. The part number for this ignition coil is 3T5-06171-1. It is a high-quality component manufactured by Tohatsu, a trusted brand in the marine industry. The ignition coil plays a crucial role in the engine's ignition process, generating the necessary voltage to ignite the fuel-air mixture in the combustion chamber. With this Genuine Tohatsu Marine Part, you can ensure optimal performance and reliability for your marine engine.