Go to a Toro dealer. They can give you all the information you need. If you aren't aware, Toro (unfortunately) bought the Wheel Horse name several years ago. They stick "Wheel Horse" on everything like it is a real Wheel Horse. The only true Wheel Horse they still sell is the Classic, and they seem to be phasing even it out. However, they can still get most everything for yours, including a tiller. The Yahoo Wheel Horse Club can also be helpful, maybe in helping you find a used tiller.