The Thexton Ignition Spark Tester (404) is a professional-grade diagnostic tool engineered to help mechanics and DIY enthusiasts quickly and accurately troubleshoot ignition system problems. When a vehicle or engine fails to start, this tool is the first line of defense in determining if the issue is related to a lack of spark. It provides a reliable method for testing the ignition coil’s ability to generate a powerful spark under conditions that simulate a running engine. Its adjustable gap feature is what sets it apart, allowing you to test the coil’s voltage output against a specific resistance, thereby providing a more thorough and reliable diagnosis than a simple open-air spark test. The tool is designed to work across a broad range of ignition systems, from modern, high-energy electronic systems found in cars to the simpler systems in small engines, making it an indispensable part of any diagnostic toolkit.KEY FEATURES AND BENEFITS: Adjustable Spark Gap: Simulates the high-pressure environment of a running engine for accurate diagnosis. Versatility: Suitable for high-energy automotive ignition coils as well as small engines like lawnmowers, chainsaws, and motorcycles. Clear Visibility: Integrated gauge with high-visibility background allows spark observation even in low light. Safety Shield: Protects the user from sparks and electrical shock during testing. Quick Feedback: Provides immediate spark confirmation to streamline troubleshooting.SPECIFICATIONS: Adjustable Gap: 0 to 40,000 volts Included in Product: Thexton Ignition Spark Tester (404) with attached ground clipHOW TO USE: Prepare the engine: Ensure the engine is off and cool before starting. Locate the spark plug boot to be tested. Connect the tester: Remove the spark plug boot from the spark plug and insert the metal tip of the tester into the boot. Ground the tool: Attach the testers alligator clip to a clean, unpainted metal surface on the engine block. Crank the engine: Have a helper crank the engine briefly while you observe the tester. Observe the spark: Watch the adjustable gap for a spark. Adjust the gap to measure coil strength and performance.BENEFITS OF USING THEXTON IGNITION SPARK TESTER (404): Accurate Diagnosis: Offers a reliable assessment of ignition system performance beyond open-air tests. Time-Saving: Quickly determines if a no start issue is spark-related. Versatile Application: Compatible with a wide range of engines and ignition systems. Enhanced Safety: Safety shield minimizes the risk of electrical shock or burns. Cost-Effective: Prevents unnecessary replacement of ignition components by pinpointing faults.FEATURES: Adjustable screw mechanism for setting spark gap and simulating compression Clear spark visibility with high-contrast gauge background Safety shield ensures user protection during operation Alligator clip provides secure and easy grounding Compatible with multiple ignition systems, including modern electronic and small engine coils