It can be very frustrating if a lawn tractor engine fails to start correctly. In that case, the problem is usually with the starter. You will know you have a bad starter if you hear a cranking noise but without any engine turnover. Every time you start the mower, nothing happens. But you cannot say the problem is the starter until you are sure that you have a fully-functioning battery, clean battery leads, fresh spark plugs, and functional starter solenoids. If all of these parts are working correctly, and the mower still won’t start, then the problem definitely lies with the starter.