Configured with a double-ended design featuring both a straight and a 90° boot, this inline spark tester provides a visual check of ignition system performance. It connects directly between the spark plug and the plug wire to flash a mirror image of the ignition spark while the engine is running. This 5 oz (141.7 g) tool allows for the rapid diagnosis of ignition issues across various engine configurations.

Configured with a double-ended design featuring both a straight and a 90° boot, this inline spark tester provides a visual check of ignition system performance. It connects directly between the spark plug and the plug wire to flash a mirror image of the ignition spark while the engine is running. This 5 oz (141.7 g) tool allows for the rapid diagnosis of ignition issues across various engine configurations.