You need to come down from the mountain and have a beer with me.
I'm going to guess that your 250xp has the same problem that mine (and most) end up with - the stator is kind of flopping round on the shaft as it rotates. The shaft has a taper pin in it which isn't a particularly brilliant design. The entire mechanism - stator coupler, shaft and tapered pin pretty much sucks. There's a removable coupler on the stator, and it really ought to be a taper fit on the shaft, or at least keyed. It's neither, the fit from new is kind of loose slip fit. So obviously over time the taper pin doesn't cut the mustard and the shaft and coupler flog themselves out till the stator is wobbling round like mad. At that point the pin often shears, and since the taper is so flogged out it's a common repair to drill it out and replace with a bolt, which keeps you going for a while. Till that shears, Then replace etc etc... Till eventually the coupler itself flogs out real bad.
There are various solutions, the cheapest takes the most time. The shaft is welded to the feed roller assembly. It isn't particularly a hard job to remove the lift cylinder, raise up the box, remove the bearings then remove the whole shaft/roller assembly. From there the cheapest option is to have the shaft welded back up to good material and machined true again, and same story with the coupler. They can both be welded/machined back to good for about $400-$600 but you'll probably lose a few days of use of your machine at least. Leave the feed roller on the shaft for this. I know a couple of machinists that can do this work, and I can weld it for you if that's the way you want to go.
The fast expensive alternative is to replace the entire feed roller/shaft assembly and coupler. I can't remember exact prices off the top of my head but somewhere around $2k not including bearings which were not expensive as they're off the shelf from any bearing supplier. Call marriott for pricing/availability. The third option is to replace the shaft only, and coupler but you will need an oxy or a plasma cutter and a steady hand. The feed roller is about 6mm from memory or might have been 8mm. You need to do a neat job of it so you can weld it all back together again. I went this way as marriott had a shaft in stock that they'd had forever and nobody wanted it so they sold it to me for half price. From memory the bill for shaft, tapered pin and coupler came up to about $800 and I was able to do the job overnight and be back to work the next day. The feed roller need not be super concentric/balanced as it rotates so slow, but within 1mm for sure. Again, I'd be calling marriott to check for availability/pricing on the shaft before making any decisions. The coupler alone is about $400 from memory.
My service ute has a genny, MIG, TIG, plasma and plenty of tools etc if you want a hand. I work for beer.
