[bignastyGS]

My 1200 has a 14 hp out of a 1450. I am thinking it's just the nature of the beasts. My mother in laws 1450 vibrates bad as well when at low idle.My tractor has the lower vibration but if you ever so slightly throttle it up,it seems better.Are you sure you didn't over tighten the ISO mounts? I barely tightened mine and it seemed to help. Another item that was missing on mine was the 2 rubber snubbers that are in the front of the engine rails. They are about 1/2-3/4 inch thick. I noticed them on the 800 we have as well as the 1450 here. Helped a little,but some vibration still exists yet...I too, noticed the big difference between Dustin's 149 and mine. The 149 was way more smoother operating...