Question

If the engine magneto switch is turned to the "OFF" position, but the engine continues to run, the probable cause is ________.

1) Faulty ignition switch
2) Faulty magneto
3) Faulty spark plugs
4) Faulty fuel pump

Answer 1

The most likely cause for an engine continuing to run with the magneto switch in the 'OFF' position is a faulty ignition switch, which should normally ground the magneto to prevent it from sparking.

Step-by-step explanation:

If the engine magneto switch is turned to the "OFF" position, but the engine continues to run, the probable cause is a faulty ignition switch. The magneto is a type of ignition system used in many piston-engine aircraft and small engines. It generates voltage for spark plugs, allowing the engine to ignite the fuel-air mixture.

When the magneto switch is turned to "OFF", it should ground the magneto to prevent it from producing a spark, thus stopping the engine. If the engine does not stop, it is likely that the switch is not properly grounding the magneto.