I apologize if I am being a pest as I am still trying to get my 125, 48" mower deck running without any success. I have taken the deck, and under carriage off the 125 numerous times hoping to see something that might explain why the apparently correct IH-489397-R3 3/8" wide 75 1/2" long belt between the PTO, and the deck pulley is super tight. I took a few more photos of the deck with the mule drive propped up with wood hoping some eagle eye might see something I have not. The one thing I do not want to do is a hack job on the deck, so my only avenue seems to be trying to use a piece of clothesline to simulate a belt? Then measure the clothesline, and seek out a belt that length? I am leaning toward towards the 80" IH-490489-R2 or an 81" IH 473462-R4. The only difference I noticed was in the on line manual where a photo of the mule drive "idler wheels" indicated my "idler" wheel assembly was reversed. At last I thought I had found something, but it now appears that the assembly can be installed, and welded either way.