Okay, here we go again. Last year I was trying to figure out what was wrong with my Atlas 5HP because it wouldn't pump water. It was suggested that I get a new wobbler impellor which I did and I replaced the old one but it still doesn't slobber any water out! Am I missing something? What else could be the problem? Maybe the concentric (though that seems fine)? The housing? I'm out of ideas though I'm sure it's probably something simple. Please help. Thx