This authentic OEM replacement spark plug is specifically manufactured for use with Makita generators and is supplied directly by the original equipment manufacturer to ensure quality and compatibility. The spark plug delivers electric current from the ignition system to the engine’s combustion chamber, igniting the air-fuel mixture to po...Read morewer the engine. Over time, spark plugs can become dirty or fouled, leading to poor performance or starting issues, and should be replaced as part of regular maintenance. This item is sold individually and includes one spark plug per order. Be sure to gap the spark plug according to the specifications in your outdoor product’s owner’s manual for optimal performance.