I bought this used and although it starts up 1st time and runs great, I can't get a good smooth edge with it. It leaves the grass edge, jagged and torn instead of cut. I have a stihl fc-75 that will leave a great edge not matter how worn down the blade is. I noticed on this fc-110 that the end of the blade gets tappered really quick. I'm not sure if thats the problem but the result is the same even with a new blade. I have used it on an unkept lawn where the grass was grown over the curb and it cut through it like butter; however, the edge is not clean, its very jagged and rough. The edger is only a year or two old. Any help appreciated.