I have the deck off of my Troy Bilt Pony to change the blades when I noticed that one blade turns freely in both directions and the other turns a little harder in only one direction. Is this normal? Also, can I start the tractor without the deck on it without causing damage to anything? It wouldn't crank before I removed the deck and I thought it might be one or both of the blades being stuck. I should also sheepishly mention that I hit the side of my house hard enough to flatten the left front tire. I put it in reverse and backed it down hill to a flatter surface so that I could take a look at it. It would not start after that. Flywheel was very hard to turn. I took a look at the flywheel key but it looks OK(not sheared). I put it back together and then I could turn the flywheel by hand a bit. It seemed to get looser and looser as I turned it, and I'd like to try to start it to find out if it will run before I change the blades and put the deck back on. I am pretty amateur at best and only know what I could find out on Youtube. Any help would be greatly appreciated.