Check for fuel flow to carb. If good there, remove the elbow going into the carb. were the fuel line attaches. The should be a mesh screen/filter, attached to the el. Check for sediment that may have been caught in there. Some spray carb. or brake cleaner will flush it out. A shot of compressed air to finish it up.
If there is no screen/filter attached to the el, remove the bowl from the carb. More then likely sediment in there. If it's there, there's a good possibility that the discharge nozzle (brass tube sticking up on abut a 45º angle) has some blockage. Remove it and check for blockage, especially in the really small cross drilled holes towards the bottom end. Also remove the jets, and spray carb. cleaner through them. A single wire from a wire brush, or a strand of wire from say 10 or 12 ga. automotive type wire makes a good cleaner.
The crappy gas they make now a days w/ethanol, seems to make crud in the fuel tanks, due to drawing moisture. 99% of the time I have problems with my gasser's, that's the problem. Once I get the system clean, I dose them with Seafoam, and try to remember to give them a dose several times a year. Especially in the late fall, and in the late winter, very early spring, when everything around here seems to go through the spring sweat. Up here, when it's been in the upper 20's to lower 30's, then gets to 60º or so, everything beads up with moisture, like they are sweating.