Of course, if your machine has been running you may not need to replace the plug...necessarily How to change a spark plug on a chainsaw This is perhaps kind of obvious but your machine needs to be turned off. Release the trigger on your chainsaw and slide the ignition switch in the ...
Your starting point for guidance is in your instruction manual. This will tell you what sized spark and gapped plug you need. Look in the 'Technical data' chapter of your manual. If do not have one to hand, google your machine type and model for a PDF version. Remember, while your mac...