Tranny won't allow that. The damn thing died in the middle of mowing a couple weeks ago. Got a spark, it just wouldn't turn over. In my anger in trying to get it started, I inadvertently left the ignition on. I'm not sure it's the battery. I think the fuel line might be plugged, but I haven't had time to check.depending on the type of transmission you have you might be able to getting rolling and pop it into gear to get the engine started if for whatever reason you cant use the car battery. but that method isnt exactly good for any of the drive train parts.