ORIGINAL: huey-pilot
Your Hanger 9 pump is sticking because the small screw in the side of the pump is too tight. You will have to peel back the Hanger 9 label to find the screw, just back off the screw enough to allow you to turn the pump handle, if you back it off too far you will have problems priming the pump. I believe that this is the same pump that Dubro sells.
Before I go fiddling with the pump can you explain what purpose does this screw serve.
Altavillan,
You could have a point there about the pump drying out, as I do drain my tanks after use so most times the pump is empty. Will try leaving it in a primed state and see if that helps.
Karol