Used to accurately check spark plug in ignition systems without removing spark plug from engine.
Verifies if energy is sufficient for spark plug to fire. If Voltage on HEI tester is great enough, the center electrode is not used.
Attach spark plug wire to tester end and clamp tester to engine as ground, Crank engine and check for spark.
Package:
in sliding blister card
144 sets/carton/9.0, 10.0 kgs/1.2'
