Spark plugs are devices that deliver electric current from an ignition system straight to the combustion chamber. Spark plugs can be found, of course, in spark-ignition engines and they are responsible for igniting the compressed air/fuel mixture while containing combustion pressure within.
While inspecting these devices, there are several things that you ought to look for. You need to check the electrode because it may worn out and you also have to make sure that the electrode insulator is in good shape. In addition, an essential point is to replace the plugs with the ones that the manufacturer recommends.
In the video below, you’ll find out everything you need to know about a spark plug, how to inspect it and how to change it. Check it out!