🔧 Adjustable Spark Plug & Ignition Coil Tester

Quickly diagnose ignition system faults by observing spark color and spark‑gap distance. This handy diagnostic tool works for cars, motorcycles, generators and lawn‑mowers, perfect for professional mechanics and DIY vehicle repair.

✨ Key Features

▪︎ Adjustable Spark Gap Knob: Turn the top red knob to modify spark viewing pitch for different engine models. Helps prevent misfire and protects ignition coils from burn‑out during testing.

▪︎ Reliable Conductive Metal Joints: High‑quality metal connectors deliver stable high‑voltage current transmission, improving test accuracy and long‑term durability.

▪︎ Clear Visible Testing Window: White printed scale marks support gap measurement from 0‑40k. Scale remains easy‑to‑read even under bright daylight for precise visual judgment.

▪︎ Safe Grounding Setup: Comes with rubber‑insulated ground wire and sturdy safety alligator clip. Securely grounds the unit when feeding high‑voltage current for risk‑free operation. Judge component status easily: healthy ignition produces steady blue‑purple spark; yellow‑red or intermittent spark indicates faulty coils or plugs.

▪︎ Compact Hand‑held Size: Main body measures 4.5 inch, 19.7‑inch long ground cable, easy to hold and maneuver inside tight engine bays.

🛠️ Broad Compatibility

Fits most ignition systems for passenger cars, motorcycles, marine engines, generators, lawn mowers and other small‑engine equipment. Great for auto repair shops, home garage DIY troubleshooting and routine maintenance checks.

📝 Simple Operation Steps

1. Shut down engine and remove spark plug coil
2. Fasten the tester’s alligator clip to engine ground point
3. Connect the tester metal terminal to spark plug wire
4. Crank or start the engine
5. Observe spark color and jump distance through viewing window to tell if ignition coil or spark plug works properly

📦 Package Includes

1 x Spark Plug Ignition Coil Tester