The BRIGGS & STRATTON 84005190 Engine Armature Magneto Coil helps provide reliable ignition for consistent engine starting and performance. This replacement ignition component is designed to generate the electrical spark needed to ignite the air-fuel mixture in the engine\'s combustion chamber. It works by converting the magnetic energy produced by the flywheel into high-voltage electricity, which is delivered to the spark plug at the proper time. Replacing a faulty armature magneto coil can help restore dependable starting, reduce ignition-related issues, and support smooth engine operation. It contributes to maintaining the efficiency and reliability of compatible small engines.