Engine runs, mower deck runs, but tractors suddenly stopped. No power to the wheels. This happened while I was in motion. There was no noise or other indication of trouble. If I try to put it in gear and move I saw blue smoke coming from under engine.

This sounds like big trouble, but I haven't been able to trace problem yet.

Steve, September 2005

Had the same problem happen over the weekend and it turned out to be the idler tension pulley located under frame on the rh side sitting in the seat. Replaced the pulley and it works fine.

BP, April 2007