What tool is used to verify spark from the ignition system?

The tool that is specifically designed to verify spark from the ignition system is the spark tester. This device connects to the spark plug wire and allows you to visually see if a spark is generated when the engine cranks. By providing a controlled environment for the spark to jump, it helps to determine if the ignition system is functioning properly. The spark tester can indicate if the spark is strong enough to ignite the air-fuel mixture in the combustion chamber.

Using other tools for this purpose might not yield the same direct insights. While a multimeter can measure voltage and continuity in electrical components, it does not provide a visual output of the spark itself. A compression tester is used to measure the engine's compression pressure, which helps diagnose issues related to engine health but does not assess the ignition system's functionality. A timing light is typically used to check the ignition timing of an engine, but it does not directly test if spark is present. Thus, the spark tester is the most appropriate tool for this task.