I searched the old site and found alot on flojets, mostly not to rebuild them. Yet, as the glutin for punishment that i am, I want to try for myself anyway. My question is: The pump sometimes leaks air out of the muffler, sometimes not. I dont want to buy all of the kits to rebuild. wHAT is most likely my problem, and what kit should i try? Just food for thought, I submitted a request for technical support from flojet, and got no response!!!!!!!!