OREGON spark plug for 4T, thread M10×1.00, thread length 12.7 mm, marking A7TC. Suitable for Alpha, Delta and 4-stroke scooters. The spark plug ignites the fuel mixture with a spark.
Replace the spark plug if starting is difficult, if there are misfires or carbon deposits. Check the gap and the condition of the electrode. 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.
