What Causes A Lawn Mower To Start Then Die. Its very common that your lawnmower starts but wont stay running. It could be a failure on the spark plug lack of gas flow to the engine a clogged air filter and the most common is a dirty carburetorActually most of the problems that stall the engine while it is just starting come from the problem in the carburetor.
It could be a failure with the spark plug lack of gas flow to the engine a clogged air filter and the most common is a dirty carburetor. Old or bad fuel can leave a gummy residue inside the carburetor which can restrict it preventing the proper ratio of fuel and air from entering the cylinder and stalling the engine. A spark plug problem will result in the mower being more difficult to get going and in some cases the faulty spark plug may prevent it from starting at all.
Signs of spark plug issues include the following.
Before cleaning the carburettor. This ratio offers optimum performance. I removed the carb and found nothing wrong anywhere. Actually most of the problems that stall the engine while it is just starting come from the carburetor.
