45.4cc Gasoline Grass Trimmer Machine Brush Cutter

Common faults and causes of lawn mowers: maintenance and handling methods for lawn mowers

Fault 2: Insufficient power. The cause analysis and handling methods are as follows:

1. The fuel tank switch is not fully open. Troubleshooting method: Fully open the fuel tank switch.

2. The fuel tank cap vent is blocked. Troubleshooting method: Open the vent hole of the fuel tank cover.

3. The main needle valve of the carburetor settling cup is blocked. Troubleshooting method: Clean the main needle valve of the sedimentation cup.

4. The fuel is too dirty or spoiled, causing poor fuel flow in the filter. Troubleshooting method: Replace with new qualified fuel and clean the filter screen in the filter.

5. There is water in the fuel. Troubleshooting method: Replace with new qualified fuel.

6. The fuel grade is incorrect. Troubleshooting method: Replace with new qualified fuel.

7. The air filter is dirty and obstructs normal intake. Troubleshooting method: Clean the air filter and update the filter element or filter assembly if necessary.

8. Excessive carbon accumulation in the exhaust pipe causes poor exhaust flow, resulting in a decrease in engine power. Troubleshooting method: Clean the carbon deposits in the exhaust pipe.

9. Excessive or insufficient valve clearance. Troubleshooting method: Adjust the valve clearance correctly.

10. Spark plugs have faults, such as carbon buildup and uneven electrode gaps. Troubleshooting method: Clean the carbon deposits and dirt around the spark plug electrodes, and adjust the spark plug gap to 0.6 to 0.8 millimeters.

11. Excessive trimming caused the lawn mower to operate under overload. Exclusion method: Reduce trimming width or decrease travel speed.

12. Excessive blade wear. Troubleshooting method: Polish the blade or replace it with a new one.

13. The throttle soft shaft has a malfunction, causing the air door to not fully open. Troubleshooting method: Adjust the throttle soft shaft to the appropriate position.

14. Excessive wear of the cylinder and piston causes insufficient cylinder pressure. Troubleshooting method: Replace the cylinder, piston, and piston rings.