Hey all, new to the forum here. I purchased a Toro Proline 30190 18hp Briggs w/ a trac vac system last season, and had no problems with it. I had just been using it once a week for my own yard, and previous to that the original owner ran it daily for quite a few summers with no problems. So, the thing is, I changed the oil and filter in it, and when I went to turn the engine over, there was nothing. just a little click, it wouldn't crank, fire, anything. I know its not the battery, and it was running perfect up until I changed the oil in it and then it just completely stopped working. I've checked everything, and nothing seems to come unplugged or look out of place. Any input on this problem? Thanks guys.