Check the listing for details. 2 Pcs Inline Spark Plug Tester, Plug Engine Ignition Tester, Auto Motorcycle. Condition: New. Listed at 9.45 USD. Feature： PRACTICAL DIAGNOSTIC TOOL: Diagnose problems quickly! Our spark plug ignition tester is fit for small engines and vehicles to quickly and easily diagnose ignition, engine problems, and defects, and troubleshoot spark plug connections, contact points, defective cables, etc. A NICE INVESTMENT: You will get a 3pcs small engine troubleshooter is an excellent tool for checking the spark from a coil on a lawnmower or other small engine. Essential Troubleshooting for All Internal & External Combustion Engines, cars, trucks, motorcycles, lawnmowers, chainsaws, trimmers, snow-blowers, generators, etc. A must-have for any individual, professional mechanic garage, and auto shop. SUPERIOR MATERIAL: Rubber sheath, high-quality high-temperature-resistant wire, environmentally friendly acetate fiber plastic, work in high and low-temperature environments have no effect. NICE&DURABLE: Internal bulbs last for years, replaceable transparent housing design. The wires are well insulated, it fits snugly to the connectors, and the light is bright enough to see during daylight hours. Saves a lot of diagnostic time. How To Use： With the engine off, remove the spark plug wire. Attach a black connector to the spark plug. Insert the metal end of the tester into the spark plug wire. Start the engine. (If the ignition circuit is complete, the bulb will flash.) Specification: Type: Spark Tester Material: Plated shaft Product Size: Approx. 11.3 inches/ 28.8 cm in length Quantity:2 Pcs Application: All Internal & External Combustion Engines, cars, trucks, motorcycles, lawnmowers, chainsaws, trimmers, snow-blowers, generators, etc. Suitable for :For any individual, professional mechanic garage, and auto shop. Package Included： 2Pcs Spark Tester Note： The engine spark tester is a diagnostic tool for any engine with a spark plug, which can quickly and easily diagnose ignition/engine outboard motor issues or a fault in the fuel delivery system. Just connect the tool between the spark plug and the plug wire. The tool is double-ended to offer a straight boot and a 90 boot on one tool.