Spark tester with adjustable gap. Effective on electronic and small engine ignitions. Provides instant diagnosis of ignition problems whether a faulty coil or ignition wire. Adjustable gap measures spark strength from 0 to 40,000 volts.
This easy to use tester eliminates the guess work! For automotive, motorcycle, marine, rv, lawn and garden ignition systems.
Accurately test ignition system performance by measuring the effective ignition voltage strength. Isolate faulty plug wires and ignition coils by measuring voltage available at the ignition coil and again at the spark plug end. Merely testing for ignition voltage regardless of strength using other test lights and fixed gap testers is very misleading. Weak ignition components may still deliver a low voltage but will inadvertently produce annoying engine misfires.