Tom glad to help. It was a Murray OEM 36" belt, #319596MA. I bought it on Ebay from equipatron . I have to tell you that I tried 2 other sellers that had replacement belts for #319596MA and both of them did not fit. One was 1/2" to long and the other was 1/2" to short. The belt MUST BE 36", that`s why it must be OEM. I emailed them before I bought it and had them measure the belt before I ordered it. Be wary of replacement belts from Amazon with this model #.
On a side note, I also needed a new auger belt for my 2 stage YardMan and could not locate a OEM 44" belt. I went to Advance Auto and told I needed a 1/2" x 44" belt and they brought out several that I measured right in the store. I found the right one and it is working just fine so if you can`t find the Murray try a auto parts store and bring a clothing measuring tape with you. Your belt must be 36" . Let me know how you make out.