1. Fuel Supply Issues:
- Check the fuel level and ensure it's adequate for the mower.
- Ensure the fuel line is connected securely to the fuel tank and carburetor.
- Check for kinks or blockages in the fuel line or fuel filter (if equipped). Clean or replace if necessary.
2. Carburetor Problems:
- Check for any dirt or debris that may be clogging the carburetor. Clean the carburetor following the manufacturer's instructions or refer to a qualified technician.
- Check the carburetor settings. Adjust the air-fuel mixture screw as per the manufacturer's specifications to achieve the proper fuel-to-air ratio.
3. Governor Problems:
- Inspect the governor linkage and ensure it is connected correctly. Check for any damage or wear that might prevent the governor from functioning properly.
- Clean any debris or dirt around the governor linkage or any moving parts.
4. Spark Plug Issues:
- Remove and inspect the spark plug. Ensure the plug is clean, properly gapped, and not worn out. Replace the spark plug if needed.
- Make sure the spark plug wire is securely attached and not damaged.
5. Air Filter Restrictions:
- Check the air filter. A dirty or clogged air filter can restrict airflow and affect engine performance. Clean or replace the air filter if needed.
6. Check the Primer Bulb:
- Make sure the primer bulb is installed correctly and not damaged. A faulty primer bulb can cause fuel flow problems.
- When priming, press the bulb only 2-3 times. Excessive priming can flood the engine and lead to surging.
7. Compression Issues:
- Check the engine compression. Low compression can cause the engine to run poorly and surge. Have an experienced technician check the compression if needed.
If the surging persists after checking and addressing these issues, it's recommended to consult with a qualified mechanic for further diagnosis and repair.
