Inline Spark Plug Tester, Plug Engine Ignition Tester for Automotive, Car, Lawnmower, Small Motor Vehicles Engines - Coil/Armature Diagnostic Detector Tool Spark Plug Tester (4 pcs)
- ...nd low temperature environments have no effect..
- ✔ 【Easy To Use】It takes about 30 seconds essential for trouble shooting all internal combustion engines. Easy to use just simple connect the tester between the spark plug and the plug wire. Inline spark tester of black connector attach the spark plug, insert metal end of tester into spark plug and then to start the engine. If ignition circuit is complete, the small engine spark tester's bulb will flash..