Most small engine starting issues boil down to problems with fuel, spark, or airflow. Clogged carburetors can disrupt the fuel-air mixture, stale gasoline can cause weak combustion, and dirty air ...
Confirm that the fuel valve is on, there’s gas in the tank and the spark plug is in good shape. Shoot a one-second burst of aerosol lubricant or carburetor cleaner down the throat of the carburetor.