How often should I replace my spark plugs? Unfortunately, there is no single answer to this question. As spark plugs grow older, they lose their sharp edges as material from the center and ground electrodes is slowly eroded away. As the gap between these…

Power Equipment Spark Plugs Did you know there are several different spark plugs for power equipment applications? With so many spark plug options, it is very important to use the correct spark plugs for each application. Grouping all power equipment…

Decoding Spark Plug Part and Stock Numbers Did you know every NGK spark plug has both a plug number and a stock number? Only the plug number is labeled on the spark plug, while both are printed on the box. The plug number is used to decode the spark plug…

Waste Spark Ignitions Like most automotive systems, the ignition system has undergone many changes. One example is the Distributorless Ignition System, or “DIS” for short. This system introduced in the 1980s. The distributor, coil, cap and rotor the…

Understanding Spark Plug Heat Range One of the most misunderstood aspects of spark plugs – is the heat range. One misconception is that the heat range is related to the spark temperature or intensity. Another common misconception is that the spark plug…