I dont do forums normally, but had searched here about folks that have had the same problem with their BX25 as I did, prompted me to do so!! I may be to late but found out some great info that may be helpful about their bx25 sputtering along with several other issues! So, Ill begin by saying that my Bx25 was bought about 20 months ago and all of last year, ran perfect! But this year about 2 months ago, all of a sudden, my bx started sputtering til it died! So, I called my dealer and was told I should change my filters, There is 2! I did, and it ran great for an hour or two, then, yep, it did it again! Moving along, % filter change outs later, it would do the same thing, ru great for a while and then, ultimately stop! Crap! What could it be? Couldnt be the filters, at least while it ran good!! So, I figured there must be junk in the tank! Problem is..... ya cant get in the tank! So, I cut a 3.5" hole with a hole saw where I could get my hand in there and could see the fill inlet! Yep, its ok! Diesel dont blow, its plastic, no spark! I pumped the good fuel out and low and behold, there was what appeared to be some sort of grit in a well right beside the inlet! Also, I might add, the inlet, is only 1/4" tall(not tall enough) is right beside the well wher the trash was, so any shaking would let the trash right down the inlet! Cleaned and dried and vacumed the tank out and while I was in there, I could feel the float that tells ya how much fuel ya have, and the arm on the float was horribly rusted and flaking off into the tank!!!! So, after cleaning the tank thouroghly, I cut a piece of alluminum tread plate, 1/8" over the hole with Permitex, filled up the tank after putting new filters on again, and yep, fired up and ran great!,,,, for about and hour and half!! Tired of it all< I called my dealer I know pretty welll and he ask if i had changed the filters, yep, I said, I started to tell him about the rusty arm inside and he interupted me and said, I was going to mention that, weve had several tractors with the same problem as you! He said, we changed the metal arm out with a new one and changed the filters and that cured the problem! So, Its scheduled to be changed next week! The sputtering ti it dies is probably all the rust in the tank cluttering your filter, and it does it very fast, like an hour! Also, he told me thar the 2 switches under your seat on the right side, sometimes had caused very similar problems, diesels just dont stop when cut off sometimes, ya know, but i checked those, and that wasnt a problem! Heres the other problem! Ya might say, that was stupid to cut a hole inyour tank , but when asked, have they(Kubota),changed what the fuel arm is made out of? I dont know he said! So, if they havent changed what the arm is made of, itll happen again!! SO, if your reading this and have the same issue, and it under warranty, let"m know you know about the rusted arm in the fuel tank! I acctually thought about taking it out and using the old method of knowing how much fuel i had, but, its warranted, so, Ill get it fixed. They really are awesome machines! But just had to figure it out and I hope this helps give ya some helpful info!! Ill post later to let ya know for sure if that cured it!!