Here's a sneaky trick that has worked pretty often for me. Open up the idle mixture screw a couple of turns, then rev the engine up close to cruise RPM and either close the choke or clap your hand over the top of the carb. Do this several times. If there's a tiny bit of debris stuck in the idle circuit, the quick shot of high vacuum will draw liquid gasoline through all the passages in the carburetor and maybe flush it out. If it works, fine- - - -readjust the idle mixture and press on. If not, you're going to have to open up the carb and put high volumes of air through every passage to clear the clog.
I hope you didn't use thread tape on any of the fittings of the new pump- - - - -tiny slivers of that stuff love to clog carburetor passages!
Jerry
