Hello, I am confused as to why my Briggs and Stratton lawnmower won't start. (yardman 6.5) I tried to start it this morning and the rope will not pull. I try as hard as I can, but there is no give coming from the mower. I looked underneath and it doesn't seem as if there is anything stuck in the blades. I am not good at any of this so all I know how to do is mow. I will try and fix this on my own but will probably have trouble even opening the cover. Yes, Im a girl... lol :) Thanks!