Yosoo Car Spark Plug Tester,6-12V Inline Spark Plug Tester Auto Diagnostic Tester Tool for Lawn Mower Trucks Motorcycles Big/Small Engines

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  • Quick Diagnosis of Problems The ignition tester easily tests the continuity of the ignition circuit of each cylinder, and quickly diagnoses problems with the ignition system. It is a useful troubleshooting tool for all internal combustion engines.
  • Cellulose Acetate This ignition tester is made of high-quality cellulose acetate plastic, which can ensure maximum strength and versatility, and extend the service life.
  • Easy to Use Use this spark plug test light to easily determine which cylinder is causing the problem. With the engine off, remove the spark plug wire. Connect the black connector spark plug, insert the metal end of the tester into the spark plug wire and try to start the engine. If the ignition circuit is complete, the bulb will flicker.
  • How to Use The ignition tester is connected between the spark plug and the plug wire. If sparks are being sent, the tester will reflect the sparks and light up-look for dirty spark plugs, defective points, cables or poor connections, etc.

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