Noisy Mag 7

[Leon71]

I have a Mag 7 pump that I bought about 5 years ago. I decided to use it for my 120g. Being that the tank is drilled with a 1" bulkhead (600gph), I figured it would be big enough. So I finally get the sump plumbed and the DT ready and filled. Plug in the pump, and damn is that thing ever loud. Did it get damaged lying around? I thought these pumps were relatively quiet. Any suggestions?