- The idle screw is still too far out. Try turning it in a little at a time until the engine starts. Note: If the engine speeds up, that means that the screw is too far out; and if it continues idling faster than before, and eventually shuts off again, that means the screw has just gotten even farther out.
- The carburetor:
Check the carburetor for any blockages or damage. Cleaning the carburetor may resolve the issue.
- The spark plugs:
- Make sure they are clean and properly gapped.
- The ignition system:
- Check the distributor cap, rotor, and spark plug wires for any cracks or damage.
- The fuel filter:
- A clogged fuel filter can restrict fuel flow to the engine causing difficulty in starting.
- The fuel lines:
- Make sure the fuel lines are not kinked or clogged. Inspect for leaks.
- The fuel pump:
- Check the fuel pump to ensure it is working properly and delivering sufficient fuel pressure.
- The air filter:
- A dirty or clogged air filter can restrict airflow to the engine and affect its starting ability.
- The battery:
- Check the battery for proper voltage and connections. A weak battery can affect the starting system.
