This ignition coil is a critical component in the ignition system of a power tiller and water pump engine, which is essential for starting and running the engine efficiently. Its primary function is to convert the low voltage from the battery into a high voltage that is necessary to create a spark at the spark plug. This spark ignites the air-fuel mixture in the combustion chamber, allowing the engine to operate. This ignition coil is suitable for 168F/170F engine power tiller and water pump.