I don't know why cub hasn"t notified the owners of the 723X and 727X owners of the potential for these bolts to work loose. The bad part is, if they break loose and you have to repair the motor it is your fault totally. I don't think the other manufacturers are having these problems of this magnitude or at least I hope not. Come on cub notify the owners, because I am sure a lot of owners do not know of this potential problem. Just my opinion. The old Gunny