fill plug is a pipe type plug with either a 3/8" square inny or outty. the outty you can put a ratchet extention into it. the other either requires a square socket or if you can get a wrench on it. the drain is to remove the cover!!! you can clean out old gear lube with carb cleanner and replace with new gear lube depending on your climate. your owners manual will specify what type to use.