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We've had MHF 50 gas for about 18 years now. 1. Others can probably help you with SN. 2. Some, I believe most, had live PTO in the form of a two-disc clutch. Push halfway down and the ground drive drops out. All the way down, the PTO stops. A little experimenting should show you which it has. Also, they had a ground drive mode in which the PTO was geared to the rear axle drive, and its direction and speed was proportional to the tractor direction and speed. 3. Jumping out of gear is a new one on me. Sounds like some sort of damage. It's not uncommon for them to stick in gear (1st or rev) because the shift fork slot seems to wear afterwhile. There have been a bunch of posts on that, and that can be coped with. But jumping out of gear would concern me. 4. I think they had power steering as an option by then. Ours doesn't have it and I never missed it, but then we don't have a loader either. It would be my guess you would be better to add some sort of aftermarket kit rather than look for original parts. 5. Well, gear sticking as mentioned above. But it seems to happen only seldom at worst. There have been scattered complaints of oil pump drive shafts failing. 6. That considerable choke comment is a little suspect. I would pull some plugs and check them. It could just need a tune up, or the engine (rings) could be on its last legs. Our has always started fine, even before the overhaul we did on it a few years after we got it. We've always liked ours but from what you describe I would sure hesitate to give %5000. I don't know that I would make any sort of offer until I understood more clearly what was up with the trans and engine, and what it was going to cost and take to solve both problems.
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