My question is then how can a low battery or not hold a load cause the engine to start when you don't have a key in the ignition? My orginal question said, "So I trickle charged for about 3 hours and the voltage was at 12v. Installed back on the mower when I put the red wire on the battery it was trying to start even though the key was not in mower." This would mean to me that I have a short in it some where. I have contacted my local service center and he will be looking at it next week.