I wouldn't go with a 212. The engine that's currently on there is right around 10hp or so. Plus the driver pulley for the CVT is a 1" bore, 212 is only a 3/4" pto. Minimum you'd want a 420 predator, to at least be close to the power rating and because that has a 1" pto on it. If I remember right, Tecumsehs are a bit odd in that the larger engines still have a smaller engine bolt pattern, but I could be wrong. You'll have more work if you drop down engine size when you're moving that much weight. I don't know what the gear ratio is of the transaxle, but I doubt it'll fully be low enough (high numerically) to compensate for a lower powered engine.