Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Quick way to tell if fuel pump is bad, is attach test line direct to the pump, and see if it will pickup fuel from a fuel container. If it does, pump is ok, and problem is with tank or line going to the fuel pump.
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Will the fuel pump suck from a fuel container? If so, you have a vacuum leak, or a plug at tank or hose before the fuel pump.