Lisle 50850 Ignition Spark Tester with Jump Feature
- A handy tool to check ignition spark without removing the spark plug.
- The tool is specially calibrated to measure ignition voltage.
- Works on both standard and electronic ignition systems.
- Easy to use.
- Simply adjust calibration screw to proper gap size.
- Attach spark plug wire to end of tester.
- Clamp tester on engine to ground. Crank engine and check for spark.