I can't imagine why Victa would have even considered it, the difference in manufacturing costs would have been insignificant so why complicate matters with another engine. They got it right when the came out with the Powertorque and that has been proven by the fact they only stopped making them this year. Pretty good run for a motor, over 30 years with only the plastic top being changed to make it look like a new model. My guess is sales dropped off on them because people got sick of problems with the carby causing over revving and the cable getting stuck on the lumps and bumps they put in the cam. Once people realize just how much better a 2 stroke will cut grass they are amazed. People forget that the 2 stroke turned millions of Australian back yards into easily managed lawns, and a lot of those were Victas. Remember Victa was selling 1000 of the toe cutters a day once people saw how well they performed