2-pc. In-Line Ignition Spark Tester.
Tests for lack of spark condition.
Essential for trouble shooting all internal combustion engines.
Easy to use, get results in seconds.
Finds dirty spark plug connections, defective points, bad cables or connections, and more.
Bulb flashes when spark circuit is completed, indicates ignition system or fuel delivery problem.
Simply connect between spark plug and spark plug wire.
How to use:
With engine off, remove spark plug wire.
Attach black connector to spark plug.
Insert metal end of tester into spark plug wire.
Try to start the engine.
If ignition circuit is complete, bulb with flash.