I bought a new Exmark Lazer Z HP with a 52" deck and a 23 Kohler. It is only a month old and I have gone through two springs. The big spring for the pully that runs the drive and keeps the tension. The ends of the springs keep breaking off. I just had a new one put on a week ago and today the new one broke the same way. Anyone else have this problem or has anyone had this problem? Please help if you can.