Hand bore drawing muddy water

What to do when hand bore draws muddy water?

Hi Team, We had dug up a hand bore 10 years back and were using a 1hp motor. All of a sudden, water stopped. We replaced our motor with a submersible one. Now the water is coming but it's too muddy. We have cleaned and removed the silt. We have also gushed out muddy water for a week now but the issue is still the same . Any advise would be of great help.

Thanks. Indumathi