Which part of a magneto system creates a magnetic field?

The rotating magnet in a magneto system is vital for generating the magnetic field needed for the ignition process. As the magnet rotates, it passes by a coil of wire, inducing a magnetic field around the coil due to electromagnetic induction. This process is fundamental since it not only produces the magnetic field but also leads to the generation of high voltage within the ignition coil when the magnetic field collapses, ultimately allowing for the spark that ignites the fuel-air mixture in the engine cylinders.

The ignition coil is important in the overall process, but it does not create the magnetic field itself; it relies on the magnetic field established by the rotating magnet. The P-lead serves to connect the magneto to the ignition system and allows for shutting off the ignition, while breaker points help to interrupt the current in the primary circuit to induce the high-voltage spark but do not create a magnetic field either. Hence, understanding the role of the rotating magnet clarifies its critical function within the magneto system.