I bought a 18.5 hp briggs and stratton intek ohv 42 inch cut bronco from lowes in 2005. It has been sitting in my shed for the past 6 months. I have installed a new battery but it will not start. I know the battery is good. The front light of the mower will not even turn on. When I turn the key in the ignition there is just a clicking sound. Any thoughts on what I should do. Spark plugs, fuel filter, bad wire connection ?? Thanks for the help!!