1. Fuel filter: Check if the fuel filter is clogged or dirty. If it is, clean or replace it.
2. Fuel line: Inspect the fuel line for cracks, kinks, or leaks. Ensure that the fuel line is properly connected to the carburetor.
3. Fuel tank vent: Make sure the fuel tank vent is clear and unobstructed. A blocked vent can cause a vacuum in the tank, preventing fuel from flowing to the carburetor.
4. Carburetor: Check if the carburetor is clean and free from debris. Clean or adjust the carburetor if necessary.
5. Air filter: Inspect the air filter and clean or replace it if it is dirty. A clogged air filter can restrict airflow to the carburetor, causing the trimmer to stall.
6. Spark plug: Check if the spark plug is worn, damaged, or has a faulty gap. Replace the spark plug if needed.
7. Spark plug wire: Ensure that the spark plug wire is properly connected to the spark plug and the ignition coil.
8. Fuel mixture: Check the fuel mixture ratio. If it is too rich (too much oil and not enough gas), it can cause the trimmer to stall. Adjust the fuel mixture ratio according to the manufacturer's recommendations.
If the problem persists after trying these steps, it's best to consult with a qualified repair professional or contact Ryobi customer support for further assistance.
