Does anyone know off hand what year gravely started using engines with their own internal electrical system and not a cam shaft driven magneto ? I have a few old L Models ,of which none run . The most complete one is a super convertible with a bad magneto . I personally do not care for the B.S. of magnetos and would like an engine with a lawn mower type flywheel driven electric system . I see the 5000 series used Kohler Cast Iron engines on their units ,an engine type I am very familiar with . I do not know if any of the L models used an internal flywheel type ignition or if they all used magneto.