Yea, your right about the wheel. My friend's 125 hardly has any flow, so the wheel doesn't even move. I've taken it apart and cleaned everything for him, and got the same result. Mine on the other hand has great flow, the wheel goes around very fast and almost no water comes out of the intake area. A ton of water used to come out of the intake area like last month. I cleaned everything, and it still happened. But then one day a few weeks ago, I looked at it, and it was doing great. Hope it continues to be doing fine.