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Hi Bill, Break your problem into small diagnosing steps. 1) Pull the fuel line off the carb
2) Do you get a fuel flow out of the fuel line? Yes, then your fuel tank and line are ok. Goto step3
No, then your fuel line or cap is plugged. Take the fuel cap off. Fuel out of the line? yes, then the cap is plugged. No, then the line or tank is plugged. 3) The carb has a diaphram that is a fuel pump. Diaphram is a rubberized gasket with a steel washer in the center, on that washer is a diaphram return spring, and engine vaccum runs the diaphram. The vaccum comes from the running of the engine so theres either a internal vaccum port in the carb or a external vaccum line. I vote for the internal vaccum port and it's plugged. Reclean the carb with Berryman B-12. You can get B12 at any auto parts store. Every passage port has to have a cleaner flow or it's plugged. You may have to use a fine wire to unplug the passage. 4) The engine vaccum is created by the piston on the compression stroke. Check compression. Yes good compression? Then there is a crankcase gasket leak as the vaccum is created in the crankcase on the piston compression stroke or the vaccum port to the carb is plugged. See if that helps. T_Bone
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