Calibrated to measure ignition voltage, this ignition spark tester evaluates both standard and electronic ignition systems without the need to remove the spark plug. It utilizes an adjustable calibration screw to set the proper gap size, allowing the operator to check for spark by attaching the spark plug wire and grounding the 2 oz (56.7 g) tool to the engine.

Calibrated to measure ignition voltage, this ignition spark tester evaluates both standard and electronic ignition systems without the need to remove the spark plug. It utilizes an adjustable calibration screw to set the proper gap size, allowing the operator to check for spark by attaching the spark plug wire and grounding the 2 oz (56.7 g) tool to the engine.