Ivor
We have the same problem in West Australia. The F-2020 is a Ryobi Lawn Hornet, but Ryobi Australia has the pulley for a few dollars less than the cost of the whole unit. They will not supply the part unless they repair as well, thus the cost is more than a new unit. Do as I did. Throw it in the bin & buy a new trimmer with a dependable brand & backup (IE-Stihl or Honda)
Mick
March 2010