Have a 4044r with less than 200 hrs. on the machine. When cutting thick hilly pasture with 6ft bh...after tractor has ran for an hour or 2, the rpms will drop, like its gas starved, then the tractor will die and the STOP light will come on. If I take the load off, it will work fine but will not work under the load for a couple of hours. Its almost like it is overworked/overheated. The oil temp gauge never reads hot. I can go out he next day and cut again but an hour or 2 in, it will do it again. Yesterday, I had this problem, stopped cutting, went and moved gravel / did loader work with no issues but if I would have continued to cut, the problem gets worse to the point it wont start. Can anyone provide guidance on how to diagnose or correct this problem? Thanks