1. Check the Gasoline:
- Ensure the lawn mower has sufficient fuel.
- Use fresh, clean gasoline if the mower has been sitting unused for an extended period.
- Verify that the fuel is of the correct octane rating recommended by your lawn mower's manufacturer.
2. Air Filter:
- Inspect the air filter. If it's dirty or clogged, clean or replace it.
3. Spark Plug:
- Check the condition of the spark plug. If it's worn or fouled, replace it.
- Ensure the gap between the spark plug electrodes is set correctly according to manufacturer specifications.
4. Fuel Filter:
- Check the fuel filter if your mower has one. Clean or replace it if it's dirty or clogged.
5. Fuel Lines:
- Inspect the fuel lines for cracks, leaks, or kinks. Replace damaged lines.
- Ensure that the fuel lines are connected properly and there are no obstructions.
6. Carburetor:
- The carburetor might be clogged or needs adjustment. Cleaning the carburetor or adjusting the fuel mixture might be required. It's best to take the lawn mower to a professional for this step unless you are comfortable working on small engines.
7. Choke/Throttle:
- Ensure that the choke/throttle is set to the correct position for the running condition.
- If the choke is engaged when it shouldn't be, it can cause the mower to cut out.
8. Governor:
- The governor is responsible for controlling the speed of the lawn mower engine. If it's not working correctly, it can lead to surging and cutting out. You might need professional assistance to fix the governor if it's faulty.
If checking and addressing the above doesn't resolve the issue, it might be necessary to perform further diagnostics and repairs. In such cases, it's best to consult with a professional lawn mower repair service.