The Carter AFB may experience hard starting due to a variety of issues. Some common causes include:
- Dirty or clogged carburetor: Over time, the carburetor can become clogged with debris and dirt, making it difficult for fuel to flow properly and resulting in hard starting.
- Incorrect choke adjustment: If the choke is not adjusted properly, it can prevent the engine from receiving enough fuel and air to start. When cold make sure the choke valve is closed. You need to press the gas pedal once when 1st starting. This does 2 things. Allows the choke valve to close and squirts a bit of gas into the carburetor which is needed on a cold start. When cold you can look down the carburetor and press the gas to make sure there is a squirt.
- Faulty fuel pump: A malfunctioning fuel pump can cause insufficient fuel delivery to the carburetor, making it difficult to start the engine.
- Worn out spark plugs: Worn out or fouled spark plugs can make it difficult for the engine to start, as the spark needed for ignition may be weak or nonexistent.
- Low fuel pressure: If the fuel pressure is too low, the carburetor may not receive enough fuel to start the engine.
- Faulty ignition system: A malfunctioning ignition system can prevent the spark needed for ignition from reaching the spark plugs, resulting in hard starting.
- If the hard starting is after a run and the engine is hot then it might be the main discharge is leaking gas into the intake with the engine off. You would then need to over crank to start. After turning off the hot engine look down the carburetor to see if gas is dribbling from the venturi. If so, then the discharge is leaking, emptying the bowl . **Look here on how to test the discharge.**
https://youtu.be/VR1u25p3QZw