I purchased this zero turn lawnmower about 2 months ago, since then we have had a couple problems. My main concern right now is that the lawnmower does not shift gears like it should. I do not really understand how it works but it has 4 gears to shift into. You shift it by moving a lever either left, then up or down which would shift it into either 1st or 3rd gear, and then shifting right, then up or down goes from 2nd gear or 4th gear. The problem is that the lawnmower is being unresponsive to any gear i put it into and i dont know why. The only thing i can do to get it to move is to shift it into 1st gear after waiting a couple minutes and it will have a little bit of power. The gears sometimes do work but it is only when it wants to and can never say how long they work for, before they just give out and have no push. Yes i do move my forward and reverse lever and make sure i am going forward, and the brake is not on while i try to move either. If anybody has any ideas of what is wrong i would greatly appreciate some insight to this.