Cautiously optimistic
Tech was here earlier. I had warmed up tractor and knew it would stall.
He hooked her up to his ODB II diagnostic and laptop. 2 codes, not seen before. He got mainland support tech on phone. Some discussion. I don’t remember the codes.
Had us draw off a fuel sample, clean, no water.
Another discussion and he had my tech bypass the fuel filter assembly by hooking tank directly into fuel pump. Started right up and ran nicely. Option was to put it to work. Dragged the rotary cutter a few laps around the area cut just a few days ago then headed off into the wild, same area it choked on last visit. No problem. Headed back to tractor shed. Could it be we found the problem? As said before, the simple thing? That filter was the first thing I changed when problem started last year. Tech is guessing a problem with the filter assembly itself, so has one on order. Fitted with an inline filter we left it in bypass. This weekend I will run it until it fails or feel we found the solution. I did let it run a couple hours after he left.
A bit comforting if this is the solution and nothing serious, but also frustrating that it was so hard to identify. Is it possible I got a bad filter to replace the old? Or is there something gone wrong in the assembly itself? Seems like so much time wasted.

we found the problem.