I have a 2008 LA 115 mower that quit after mowing and now won't start. It has good spark when turning over. Gas should be good since it has been running good this summer. Is there a way to bypass the seat/brake safety switch to check that? What does the switch cut out, gas, elect? My son that runs the mower is very heavy (400+) I thought that may be the problem. I haven't replaced the fuel filter yet but I wanted to bypass the switch to eliminate that first. Thanks for any help