That Quietline looks like it has to potential to be a good tractor for your needs.
I have a 1250 as well, and it was in repairable condition when I bought it five years ago. I replaced the engine mounts with genuine Cub Cadet mounts, made the cradle modification, overhauled the steering box, installed lights, fixed the electric PTO, and did a bunch of other repairs.
For awhile, I thought I would never get it working as it should be and wondered what I had spent all that money on. It was a nightmare! A fellow Cub Cadet forum contributor urged me to keep working on it. Soon, it will be a nice tractor again. Thus, I now have a 1250 Nightmare, that I dearly love, have worked it hard, and have had way too much fun with it to ever give it up.
You have a 1250 with a hydraulic lift. Most 1250s had a manual, arm-strong lift. Were this me, I would use the genuine Cub Cadet factory replacement motor mounts. Yes, they are spendy, but are a lot more heavy duty than those from CC Specialties, or other aftermarket suppliers. Do the cradle modification, and use new bolts, washers and Nylock nuts of the correct size and length. Start with two threads showing, and tighten them down after running the machine for awhile. As you let the mounts wear in, and tighten accordingly, you will find a spot where they won't allow the engine to vibrate all that much. It took me about six weeks of tightening and loosening to find the sweet spot.
It seems to me that solid mounts would absorb no shaking and only transfer vibration to the rest of the tractor.
You also must remember that single cylinder engines vibrate. That is their nature. The bigger the one-lunger, the more it will shake!
So, I'll, once again, pass on the sound advice given to me. "Keep working on it. You will get it fixed eventually." Quietlines are great tractors!.
Be well.
Brian Wittman
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