1. Check the fuel tank for leakage of holes
2. It must be replaced with a sharp blade instead of an abnormal blade
3. Make sure others are not in the danger zone before starting the engine
4. When starting the engine, you need to hold on to the operating lever to avoid loss of control due to vibration
5. Before starting, make sure that the blade is far away from the ground and has no contact with other items
6. Be sure to use the spare parts provided by the original manufacturer, especially the blades
7. Check if the full cover is locked.