According to the parts manual , Ser # 966809000 and higher I have here ( free download from Husqvarna ) the belt number is 575 852401
That was the correct drive belt #. Thank you
According to the parts manual , Ser # 966809000 and higher I have here ( free download from Husqvarna ) the belt number is 575 852401
Fixed! I am embarrassed to say but I had the pulley/fan on wrong (fan on top of pulley) and the belt wouldn't fit. Just for anyone else that may search this in the future, you have to loosen the bolt/nut over the right side transaxle pump holding the idler arm almost to the point where you are taking the nut off to get enough room to get the belt over the right side pump pulley. Even with the bolt on the idler arm loose you still have to work to get the belt on the right pulley. Once on the pump pulleys you have enough slack in the idler pulley to feed the belt around it and the engine pulley.