Just figured out that the spring that presses down on the safety switch (when the brake is applied) was missing... And because of this no power was getting to the starter/generator. So therefore I temporarily bypassed it and now I can start it off its own battery without jumping it.

AND to my surprise the amp meter showed that the battery was being charged - which was quite a bonus.
My question here is now that everything seems to be working electrically, is there anything I should check to make sure im not frying any thing? I noticed that the amp meter will sometimes "jump" around from "O" to the charge side and sometimes when idling it will move to the discharge side. Is this normal operation?
Also, what should the voltage and amperage be at the battery when at full throttle?