This problem appears due to the number of causes. Mostly, the spark plug is damaged and has to be replaced. It is also possible when the fuel line damaged. The carburetor could be damaged or blocked. Sometimes the problem comes from the starter itself. The battery of an electric start can get drained out. When it is cold, a pull-cord also starts tricky to use. It is best to check your device correctly by the professional technician who will professionally diagnose the problem and provide a solution.