General description The Engine Ignition Tester is an essential diagnostic tool for any engine equipped with a spark plug. It is designed to quickly and easily diagnose ignition issues or fuel system failures in various small engine vehicles, including lawn mowers and motorcycles. Technical specifications Type: In-Line Spark Plug Tester Material: Nickel-plated shaft Design: Double-ended flexible tool with a straight bellows Durability: Internal bulb lasts for years Usage Turn off the engine and disassemble the spark plug coil. Connect the black tip of the tester to the spark plug. Connect the metal end of the tester to the spark plug coil. Start the engine. If the ignition wire is in good condition, the indicator light will flash. Other information Package includes: 1 Piece The tester features an excellent protective shield to prevent loose wires and electric shock.