Use a spray carburetor/choke cleaner to clean the choke plate so that it moves freely. If your lawnmower is equipped with a fuel valve at the base of the fuel tank, turn it to the "off" position. Remove the fuel line from the tank and inspect the line for any blockages.
How to Clean a Fuel Tank in a Lawn Mower or Small Engine. Remove the spark plug lead and secure it away from the plug. Use a fuel line clamp or other smooth-faced clamp to seal the fuel line where it attaches to the carburetor.
How to Check Small Engine Fuel Pumps. Turn off the fuel valve (if equipped) at the base of the tank where the fuel line is attached. If there is no fuel valve, stop the flow of gas using a fuel line clamp. Loosen the mounting screws and remove the pump from the mounting bracket or carburetor.
I have a Craftsman tractor model 917.273022 that will not start. I replaced plugs, fuel. Remove the fuel line from the inlet fitting of carburetor. Crank the engine .
