Tag Archives: spark

A spark plug is used in every type of gasoline engine. Many people change their own spark plugs. Spark plugs handle the ignition spark that combusts or ignites the engines fuel and moves the piston. Spark plugs have to endure very high temperatures from combustion. Spark plugs also have to handle the spark erosion from the ignition system.

There are many popular brands of spark plugs like champion, ngk, bosch, denso and autolite. Spark plugs can be gapped widely to help burn the mixture in the cylinder, especially if the mixture is lean. Spark plug gap refers to the distance between the little metal piece that hangs below the plug and the center electrode. A lean fuel mixture can not ignite as easily. A wide spark gap is used to jump across more of the chamber mixture and can help induce combustion.