Product Information
- 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
