Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Make and model? With engine off, look at the deck and cable and see if the cable is moving the lever on the deck when it is moved. Is the tension spring pulling the idler pulley tight against the belt?