What device ensures the magneto is in the correct timing position?

The magneto timing light is the correct choice as it is specifically designed to assist in ensuring that the magneto is set to the proper timing position during engine maintenance or installation. When performing timing adjustments, the magneto timing light provides a visual indication of the spark plug firing point in relation to the engine’s crankshaft position. This allows technicians to verify that the ignition timing is correct, which is crucial for optimal engine performance, fuel efficiency, and to prevent potential engine damage due to misfiring or pre-ignition.

In contrast, an electric governor is primarily used in controlling the speed of some engines, while an RPM gauge measures the engine speed but does not directly assist with timing adjustments. A throttle position sensor, on the other hand, monitors the position of the throttle to manage fuel flow and air intake, but it does not relate to the ignition timing of the magneto.