Brand new spark plug tester with adjustable 0-3 strength scale. This handy diagnostic tool allows you to quickly test spark strength and ignition system performance on gasoline engines. • Clear viewing window with numbered scale (0-3) and spring-loaded indicator • Metal probe tip and splined connector end • Includes attached power/ground cable with connector • Compact handheld design for easy use in tight engine bays Perfect for mechanics, DIYers, small engine repair, automotive troubleshooting, lawnmowers, motorcycles, boats, and more. Simply connect in-line between the spark plug wire and plug to verify strong, consistent spark.
