1. Carburetor issues: Check if the carburetor is clean, properly jetted, and there are no air leaks.
2. Spark plug issues: Make sure the spark plug is in good condition and the spark plug gap is correct.
3. Air filter: Check and clean the air filter to ensure there is sufficient airflow.
4. Fuel issues: Verify if there is fuel in the tank and the fuel filter is not clogged.
5. Idle circuit: Ensure the idle circuit in the carburetor is clear and functioning correctly.
6. Fuel-air mixture: Adjust the fuel-air mixture screw to achieve the proper idle mixture.
7. Throttle cable adjustment: Check if the throttle cable has proper free play and is not binding.
8. Compression issues: Check if there are any leaks or damage in the engine's compression system.