no fuel to carb on crank

It is physically impossible for fuel to leave the float bowl and travel down the fuel line to the tank. As said above, the fuel is evaporating out of the float bowl. Modern fuels contain a lot of ethanol which vaporizes easily. When the car has been sitting for a few days first crank the engine for ten seconds or so, then stop and pump the gas four or five times to prime the engine and set the choke, then start it.