I have a snapper 61" with an ICD deck 27 hp Kawasaki engine 2010 wower. The lawn mower runs good but cuts grass like a 10 day old hair cut.I am comparing it to the 61" Great Dane the cut it make looks like a fresh flat top hair cut. What would cause the cut to leave sprigs of grass standing with knew blades everthing is orginal belt,the deck has been set what else do I try.