is my water pump shot??

i drained my block a couple weeks ago because i thought i was headed to afghanistan for the winter. that was delayed to i took the boat out yesterday. i idled out for about 5 minutes then tried to pull a rider. i lost power and shut it down. i noticed the temp was about 190. so i pulled the impeller and saw it was chewed up. i replaced it today and hooked water up to it water and water isnt being pulled into the cooling system(i drained the strainer and it hasnt filled up). could it be a bad pump?