With any carbureted vehicle if it sits for long periods, water or moisture collects in the bowls causing corrosion in the aluminum accelerator pump check ball and passage. Also, the stagnant fuel thickens, collects a sticky goo that gets the floats sticking to the bottom in which causes flooding. The floats usually float to the top to cut fuel inside the carb. There is fuel stabilizer for the tank, but just driving it at least once a month prevents this. Anyways, I'd take the carb top off, inspect, clean as necessary and as necessary replace accelerator pump check ball and make sure passage is clear. This hole with ball produces fuel feed to the accelerator pump, opens to let in, but closes when accelerator pump is used. The check ball just falls into the hole to seal it by buoyancy, if it is out of round won't seal that well when the pump moves down to produce the squirt of fuel on acceleration.
Can feel like lack of fuel. Test by using eye protection safety glasses and have wet rag handy just in case for eyebrows in case of backfire, if car is running. Alternatively put a video device as your eyes for further safety and review video at end of test. Look in carb while accelerating and see for a good stream/squirt. You can do short ones or long ones.