The ECHO 15660109861 Ignition Coil is a genuine OEM replacement part specifically designed for ECHO CS-series chainsaws. This essential component is responsible for generating the high voltage required for the spark plug to ignite the fuel mixture, ensuring reliable engine starting and smooth operation. Engineered to meet original equipment specifications, this ignition coil provides precise fitment and durable performance for various ECHO chainsaw models, including CS-300, CS-3000, CS-301, CS-305, CS-340, CS-3400, CS-341, CS-345, and CS-346.