I have one of those Jap 25 hp motors made in 2003 Nobody in north Louisiana wants to work on it. I have an problem the charging dont work. Watched U-Tube for days on all types of motors---- under the flywheel on the Capacitor Discharge system is a sensor that also sends the alarm signal to the light. It affects the power Pacs that fire the coils to the plugs Is what I remember them saying --- I think it is standard on four strokes several years now--- Go ask the dealer --- Hope that helps