Spark plug wrench for 2-stroke engines. Used to remove and install the spark plug in the cylinder head.
Choose the size by the hex of your spark plug. Do not overtighten during installation so as not to strip the thread. The color of the deposits on the electrodes shows how the engine is running: light brown is normal, black and wet means a rich mixture. Before installing, check the electrode gap and compare it with the engine manufacturer's recommendation.
