1994 Arctic cat wildcat 700 snowmobile dies after 3 seconds?

It will start every time and run for about 3 seconds. The battery is gone only way i can get it to work is on the charger and battery will hold 0 charge without charger on it. So does the gas get pumped into the engine electrically? Is there a chance that the battery isn't allowing the gas to be pumped in because it cant hold enough charge? What do you guys think is wrong? carbs?|||replace battery|||As the battery is stuffed,why not renew it %26amp; see if that cures it?