Originally the lawnmower engine used a magneto coil ignition system, magnetos are simple and very common in lawnmowers. The magneto is designed to produce a high voltage spike when influenced by a ...

Davis Unified Ignition (DUI) install In An AMC 304 Four Wheeler's Verne Simons installs a ignition system known as HEI or high energy ignition by Davis Unified Ignition in an AMC 304. Related Videos ...