Mower barely moves. Even replaced belt

[Waugy317]

Im not sure what my mower is doing. I noticed it was slowing down more and more even with the pedal fully depressed. Is it something with the variable speed pullies? And help would be greatly appreciated.

 

[mechanic mark]

Post mower make, model & serial numbers, engine make model & serial numbers. We need identification information in order to help you remedy problem. Thanks, Mark