complete engine tune up oil and filter change spark plugs fuel filter air filter and pre filter. adjust carb as needed. check deck bearings and belts and check tension and adjust as needed. grease and lube mower complete check tires and air. check hydro if serviceable or not. check hydro belt and fans clean and level deck and remove blades and sharpen and balance. complete check over of mower to make sure it is working proper and cutting grass the way it was designed for.