I might be selling my 129 - not sure how much interest there would be in this. Long story short...it threw a rod this past summer. I took out the engine and gave it to a guy who knows these old machines inside and out...said he has a block for mine that has already been bored and so he'd be willing to transfer all the parts that were still on my engine when I took it to him, would put in a new piston, etc. Keyway on mine is pretty well worn out too - so he said he could do that. I still have the head since I always intended to plane it down with some wet sand paper, though he strongly suggested that it be machined. I did plane it a few months before the rod broke.
Anyway, over the past few months he developed health issues and I'm thinking that he probably won't get around to doing this anymore. So, I've got a 129 in my garage that is pretty much stripped down to the frame - have all the hydro connections undone in preparation to separate the tractor since I had intended to replace the cork gasket (pretty sure that is the cause of a leak that's been going on for over 20 years now).
Have $119 worth of new parts I just bought for it: (fan and retaining ring, pin, disc-flex coupling, gaskets: head, cork, and engine, as well as the eccentric bearing and locking collar. So you can see I had great intentions and still would proceed with a bit of reno on this thing if I can get the engine working. Besides the tractor, I also have the 42-inch deck, blade, chains for both rear tires, mule drive and also (I think anyway) a moldboard plow and brinley attachment. I have other parts too - spare tie rod ends, new spring and pulley for the mule drive, and a whole bunch of those round fittings for the front PTO. Also fairly new S/G and brand new carb that has less than 10 hours on it.
I will try and find out if this guy still intends to work on my engine, but if not, I'm not going to proceed any further and would prefer to sell it as is - essentially the frame and all the parts. I don't know if the outfit I bought the parts from back in September would accept them as returns at this point or not. I suppose I could try to sell all the new stuff piecemeal, but could also just let it all go with the Cub for the right price.
I'll report back when I find out more from the guy who has my engine, but if he tells me he can't do this work anymore, then I'm done and might list the Cub here. Unfortunately, I don't have the knowledge and experience to proceed further on the engine by myself, and without doing that, can't see the point of going further with the hydro either.