Here is what I was told. Ran fine until it seemed to start missing. They took the tractor to the dealer, which took the engine apart and based on the quote to fix it decided not to. Fast forward 5 years. The engine's bottom pan is off showing the connecting rod broke on the rear piston. Engine turns over fine otherwise, with the valve working the way they should on the rear. The tractor is a 520H with 906 hours on the meter. Obviously I am wanting as much for it as I can to help recoup some of the cost of the full purchase but also want to help a fellow WH person out. If anyone has an interest please PM me an offer.

The carb is spoken for but the rest as far as I can tell is there. I also will consider selling parts if that seems to make better sense.