1. Check whether the fuel tank has holes and leaks.
2. It must be replaced with a sharp blade instead of an abnormal blade.
3. Make sure that others are not in the danger zone before starting the engine.
4. When starting the engine, hold on to the lever to avoid losing control due to vibration.
5. Before starting, make sure that the blade is far away from the ground and not in contact with other objects.
6. Be sure to use the spare parts provided by the original manufacturer, especially the blades.
7. Check whether the full cover is tightly locked.