Fuel injection has made starting an engine easier. Usually you just turn the key and the engine jumps to life after only one or two revolutions. Carburetors, on the other hand, require the engine to be cranked for several revolutions before the fuel reaches the cylinders and the engine fires up. If everything is not perfect on a carburetted vehicle, then the engine may not start due to too much or too little fuel. Holding the accelerator pedal to the floor and cranking the starter will eventually get the engine running, but it will probably sputter and runs rough until heat is built up in the engine and the engine is no longer flooded.
Many people attempt repairs by bending or adjusting the carburetor linkage.
Seldom do carburetors go out of adjustment. If they were working correctly once, then the adjustments are usually satisfactory. Three problems commonly occur with carburetors. The first two are the linkage becomes sticky, or a passage inside the carburetor becomes plugged. Disassembling the carburetor, cleaning it, and installing a new carburetor kit is necessary if this occurs.