Hi Guys, I have a friend with a Sta-Bilt 3/4 horse and it will not prime. The pool is full to the overflow, I have check all fittings nothing loose or cracked. Line from skimmer not stopped up. I removed the cover and the discharge line. Filled the pump and turn it on. It pumps very little but the garden hose supplies more water than it will pump. I have the pump housing separated and nothing is broken or clogged. There is no water leaking. I am at a loss. Please help. Thank You