you coule eliminate places wghere the blockage isn't. Take the feed pipe off the carb. Does fuel trickle out (possibly blockage upstream from that point) or run freely? (possibly blockage downstream from that point).
Take the pipe off the tank. Does fuel trickle out (possibly blockage upstream from that point (Sediment in the tank? or run freely? (possibly blockage downstream from that point).
etc., etc.
XXX, July 2016