I have a sta-rite pump/motor that is only 3 years old and is really loud. Separated the pump to see if there was anything inside the impeller and it looks ok. Sound seems to be coming from the 1 1/2 hp motor. Any ideas?
Here is a similar model, sound file of bad motor attached:

pump:
http://www.ebay.com/itm/Original-Sta...item2ebfd05d9d

sound file of noise:
http://www.mediafire.com/?4exko706ohzgl75