Errrr! The Kohler on the Metro that I have WAS running this morning all of a sudden quit, it sounded like it was running out of gas when it was quitting, I ran outside, looked in the tank, there's plenty in there. I try to restart it, and it will not pull AT ALL. Stiff as a rock. Took the spark plug out, pulls fine, put back in, open valve cover, the bottom rocker arm is way loose, tighten that back up, put cover back on, pull it, still won't pull easily, but a little easier than at first. Is the timing wrong on the cam shaft? WTH is wrong with this thing I am ready to buy a new engine, or mower for that matter. Can anyone help???