I need help with my Yanmar FX20d. My battery charge light is on and I have to jump my tractor every time I use. What I would like to do if possible, is to replace my current dynamo and voltage regulator set up with an automotive type alternator containing an internal voltage regulator. My tractor is an FX20D 3-cylinder diesel model number 3TN82U. My tractor has a 12 volt negative ground 75 Ah dynamo(AC). If there is any one out there that can tell me how to do this if it can be done I sure would appreciate it. Thank You! denny