Your lawn mower has had the spark plug changed carb cleaned and it is hard to get to start and once you get it started and start mowing it will die please help you to find out what is wrong with it?

Answer 1

Did you make sure the plug had the correct gap (do not take for granted that new plugs come gapped for your application. Was the carburetor removed for cleaning or just sprayed with carb cleaner? Were the carburetor settings changed in any way? You don't mention if the fuel filter was replaced. You say the engine is hard to start and dies after a few minutes. The reasons an engine would do this: the engine dies for lack of fuel or for too much fuel (overflooding), the same reasons apply for hard starting. A clogged fuel filter would not provide enough fuel and "starve" the engine. The condition of the spark plug (and gap) affect how the fuel is ignited. A bad gap or plug will not completely burn all the fuel in the combustion chamber and will cause the engine to overflood. The carburetor also plays a part by either providing too lean or too rich a mixture. Ensure you have the correct plug and that it is gapped correctly. Ensure the fuel filter is not clogged. If this does not solve the problem, proceed to making carburetor adjustments. Close the carb needle valve until it just touches (do not over-tighten) and then open 1 to 1-1/2 turns and try to start the engine. If the engine still won't start or continues to die, the float mechanism is probably At Fault and the carb will have to be removed for inspection and repair. If the engine starts after the initial carburetor settings, let it warm up for about 5 minutes and while the engine is running, close needle valve very slowly until engine starts to stall for lack of fuel, Then open the needle valve very slowly until the engine starts to stall for too much fuel. Set the needle valve half way between the two extremes.