Hard starting can be from so many different things that it is hard to point to any 1 thing.
You 1st need to determine if the hard starting is from flooding, or lack of gas.
If when you do get the vehicle started and you see black smoke out of the tailpipe, then you are flooding.
If the smoke out of the tailpipe is not black, then you are probably too lean.
Too Rich (too much gas)
- Check the points, plugs, wires and any other ignition component.
- Look down the carburetor after turning it off. Any gas dribbling from the venturi indicates a problem with gas getting siphoned from the float bowl.
- Test the main discharge.
- Gas cap should be vented – test by driving with the gas cap loose and look for discharge problems.
- Vent line going to the gas tank might be plugged.
- Check for any carburetor vent plugging.
- Float level
- Float leaking
- Needle & seat leaking
- Fuel pump pressure too high