Mechanics and DIYers, this spark plug tester is an essential tool for diagnosing ignition problems! The pitch adjustment valve and round knob let you customize the observation gap for different vehicle models, which helps prevent misfires and burnt ignition coils. The metal connectors ensure excellent conductivity and durability, giving you accurate test results every time. The high visibility design with white font scale values makes it easy to read spark gaps from 0 to 40k, even in bright lighting conditions. Using it is straightforward - just attach the rubber-coated ground wire with alligator clip to your engine, connect the other end to the spark plug wire, and watch the spark through the viewing window. The longer the spark gap you can achieve, the stronger your coil is performing. The tool measures 4.5 inches overall with a 19.7 inch cable, making it compatible with most automotive ignition systems. It's perfect for troubleshooting cars, small engines, lawn mowers, and pretty much anything with a spark ignition system. The construction feels solid and professional-grade, not cheap like some diagnostic tools. If you're tired of guessing whether you have spark issues or want to quickly test ignition coils without expensive equipment, this spark tester is absolutely worth having in your toolbox. It's one of those simple tools that can save you hours of frustration when dealing with no-start conditions or rough running engines!
Free 30-day returns 
Free 30-day returns
