Which of the following is NOT a basic component of the magneto system?

The mechanical governor is not considered a basic component of the magneto system. The magneto system itself is primarily responsible for generating electrical energy to ignite the fuel-air mixture in an engine cylinder. Core components of the magneto system include the pulsar coil, which generates a signal as the engine runs; the ignition coil, which converts the low voltage from the magneto into a high voltage suitable for creating a spark; and the breaker points, which help control the timing of the spark by opening and closing circuits.

On the other hand, a mechanical governor is used in some engines to regulate engine speed by controlling fuel flow or ignition timing, but it does not play a direct role in the ignition system that the magneto comprises. This separation of functions highlights that while the governor is essential in maintaining engine performance under varying loads, it is not a fundamental component of the magneto system itself.