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!
Drive belt is loose between the engine and the hydrostat. What is the model number and I will send link showing the drive belt. If you have owners manual , look at he drive belt illustration.
I see question is still open, did you find the drive belt and check it?