Engine Basics: Ignition System Overview

The three main components of the ignition system are the flywheel, the magneto, and the spark plug. They work together to ignite the air-fuel mixture inside the combustion chamber. Watch the video to learn how they all work together.

[@touretteslife]

Thank you, you’re giving me hope that I can someday understand this massively frustrating piece of equipment that has caused me endless hours of frustration and pain. Your video is very informative.

[@johneric3886]

Excellent work, terrific communication skills.

[@donnacolauono5428]

Great job !

[@stanleybest8833]

The flywheel comes off when you drill and tap it for 1/4 bolts. If you file and shim the aluminum keyway, the spark can be moved closer to top dead center. It runs cooler and doesn't sag as much.

[@hepeng2627]

thanks share this video

[@kebo57]

At 6:46, the author seems to believe that when the magnet on the flywheel passes by the lamination stack of the magneto, a spark is created between the magnet and the magneto, which is then stepped up by the secondary winding. That is not true! There is only a magnetic field generated between the magnet and the lamination stack on the magneto, but NO spark!! The way it really works is that the 12 volts across the primary winding is stepped up, but only at the exact moment that the magnet passes by the lamination stack of the magneto.