
Check whether there is fuel in the carburetor and if the carburetor is clogged or improperly adjusted. Clean the carburetor and inspect for issues with the air-fuel mixture, choke, fuel level, etc. Check whether the spark plug has high-voltage electricity, whether the valve timing is correct, and whether the cylinder pressure is normal. Inspect for air leaks in the valves, intake pipes, and other rubber hoses, and check if the air filter and exhaust pipe are clogged.


