Must-have diagnostic tool for any engine with a spark plug;When engine won't start, gives instant answer to 'does it have spark?';Simple to use - just remove rubber boot from spark plug, insert tester & place tester boot on plug;Turn the engine over - if ignition is being sent to the cylinder, light in tester glows;Great time and frustration-saver with cars, motorcycles, boats, chainsaws, lawn mowers & more

• Fool-proof Engine Ignition Spark Tester

Fool-proof Engine Ignition Spark TesterJND