Well. The 2501 had no DPF system on it. THAT was the selling point for me. But my 2501 was a total basket case right out of the crate. I traded it in for a 3901 after 103 hours, and many returns to the dealer with no acceptable results. I know of 4 other 2501's within a 25 mile radius of me who have also had similar problems, and the dealer can't seem to pinpoint the problems. Could be a dealer problem too. The guy who bought my 2501 lives about 25 miles away, I havent spoken to him or anything, but I found out that he brought it to the same dealer for the SAME ISSUES I WAS HAVING.... So they did NOTHING to the tractor from trade in to sale. I wonder if they will tell him that there's nothing wrong with the tractor......like they told me.
Several 2501 owners that I have encountered, have the same fuel delivery problem and electrical problems that mine had. Problems seem to start around 20 hours or so, but for me, it was 23 hours of "Break In" running before I started twisting it's horns a bit and asking it to do some work. Every time I would ask it to work a bit, it would sputter, and miss and eventually stall. It would fire back up ok, but would run rough for a minute or so at 1500 RPM before smoothing out. Then it would start to do it all over again. It also kept blowing the main 40AMP fuse for no apparent reason. So I wish the guy who bought the thing all the best of luck.
Now I know that Kubota makes high quality equipment, thats why I went with a 3901. I also know there are a lot of very satisfied 2501 owners out there. But I can also point out at least 5 very disappointed owners in my local area. (and those are just the ones I know of). Is it a dealer problem, or a manufacturing problem ?? I have no clue. But I doubt you would be disappointed with the Kioti either. I have a lot of friends who own different models of Kioti and are very happy with them.
