Losing Fuel Pressure ?

[54blackhornet]

I had my QJet rebuilt by the Carb Shop in Ontario Calf. Throttle shaft rebushed and complete overhaul including well plugs epoxied. Before I reinstalled the carb I plumbed in two inline fuel filters, one a clear glass see thru type to insure no foreign matter got into the carb. After sitting a day or two you can see NO fuel in the filter and it takes forever to restart. Appears that the fuel is leaking back out thru the pump ? Any one experience this before ? Thanks