Quickly diagnose problems with all ignition systems. Connect the tool between the spark plug and the plug wire. With the engine running, the tool flashes a mirror image of ignition spark.
Lisle 20610 Inline Spark Tester, Double Ended Straight Boot and 90 Degree Boot
Lisle Tools 20610 - Inline Spark Tester (One Size Factory)
Lisle Corporation 20610 Inline Spark Tester, 90 Deg. Or Straight
Lisle Tools 20610 Inline Spark Tester Gives Visual Check Of Ignition System
Lisle 20680 Replacement Bulb, for 20610 Inline Spark Tester
