Did a oil change. Made sure oil level was good after 2 qts rode for about 40 minutes of and on with no problem then all a sudden it stalls out. I let it sit for a minute it started back up rode about 100ft and it died again i checked the oil it was over filled in the oil tank and it was cold. I ad it towed back to the house and checked the oil in the case and it was empty. What would cause this?