YTH24V48 blades not engaging

[Cool-Ace]

I think what Joed756 is referring to is the Key on the motor shaft for the PTO!? There is no Keys on any of the deck pullies, spindles or other guide pullies. Unless you had the wrong size blades there should be no reason for them to ever touch or even jam, If they jammed there is one cause that I can think of. Check each spindle on the bottom side to be dang sure none of the 4 little bolt points did not break. Unless you have an older deck that uses the 3 point bolt spindles regardless if just one breaks or shears the bolt off it can move enough to jam up the blades.