You are going to fast for the mower to cut properly! Drop to 3d low, and up the reeves a little. I don't know weather you are just topping it, or if you are going to make hay, well # !? ops. It is a nice Tractor though, look after it and it will go on forever. You have the best 3 cylinder engine, the faithful Perkins, excellent.
A small fine tractor working with top edge performance; I know it first hand, needless to mention mint condition. I think you understand the feeling.. Gruß von Costa Rica.. Centroamérica..
A beautiful tractor. I have a IMT 539 identical to the 35 Massey Ferguson .Great tractors. With mine I Bushhog in 3rd low rpm's between 1,800 and 2,200. Good video.