First check if there is enough gasoline in the fuel tank, then check if there are any problems with the supply to the carburetor and fuel pipe.
2. If there is no problem with the above, look directly at the spark plug, ignition coil, igniter and high voltage assembly. The spark plug may have fallen out or the spark plug head is not tightened enough.
3. Caused by battery loss. When starting, use the electric starter for a while (fully charge the battery first) or turn off the key and start with your foot a few more times.
4. The motor is leaking air. The combustible gas must be burned and compressed in a closed space to ensure proper engine operation.