Hey all, new to these forums. thanks for having such a great forum. Anyways, just bought a used T1600 with 720 hours. Did oil, lbed, new battery, and starts with no issues. Was doing a little mowing with it, and noticed that all the sudden it started vibrating hard. Thought it was the deck, so shut it off and it was still harsh. lowered the rpms and drove to the shade. seems like nothing let go in the engine, but the engine is shaking on full rpm, and even lower rpms too. maybe a motor mount? both cylinders seem to be hitting. aint got a clue. Any help would be awesome.