Getting my bush hog ready to do some cutting. Is it absolutely necessary to have an overrunning clutch on the installation?
If you have a live or independent PTO you won't have any problem with the inertial of the bush hog pushing the tractor; it's only tractors with the PTO shaft directly connected to the tractor's transmission that can experience that problem.
I have a tractor with an independent pto and I use a ORC with our bush hog to keep from burning out the internal clutch when I throttle back. I don't have to worry about driving the rear wheels of the tractor with he rotational inertia of the mower because I have an independent PTO but I wan't to preserve the internal pto clutch.