Auto Spark Tester — quick, reliable ignition check Key benefits Instantly tells you whether a spark is reaching the cylinder, so you can quickly decide if a no-start is ignition-related or something else. Saves time and frustration during diagnostics and maintenance by providing a clear visual indication. Built from high-grade material for durability in workshop and field use. What it does Turn the engine over; if ignition is being sent to the cylinder, the light in the tester glows. When an engine won’t start, the tester answers the key question: “does it have spark?” Compatibility and applications Works with a wide range of small and automotive engines: cars, motorcycles, boats, chainsaws, lawn mowers, etc. Suitable for both professional mechanics and DIY users who need a fast, dependable spark check. Features and performance Clear indicator light provides immediate, easy-to-read feedback during cranking. Durable construction ensures reliable operation under repeated use. Simple operation requires no special tools or setup — use as part of routine troubleshooting. Typical use scenarios Roadside diagnostic: Check whether a car’s ignition system is producing spark before replacing parts or towing. Motorcycle tune-up: Verify ignition output while adjusting timing or replacing plug wires. Small engine service: Confirm spark on lawn mowers or chainsaws before performing repairs or parts replacement. How to use (brief) Connect tester to the spark circuit as appropriate for your engine. Turn the engine over; the tester light will glow if ignition is being sent to the cylinder. A straightforward, durable auto spark tester for fast ignition checks on cars, motorcycles, boats, chainsaws, lawn mowers, and more.