50/50 on the woodruff key, at least on the two engines I've worked on so far with this issue. On mine, the key was fine, on Lloyd's engine the key was jacked up and had to be replaced. Both sprockets were ok though. New roll pins can be installed in the sprocket to seat the crank position sensor blade, which we may want to inspect as well. My roll pins had sheared off and messed up the crank sensor blade, as well as taking out the crank position sensor when the sprocket was no longer being held in by the crank bolt. I've got all the part numbers for these somewhere, since I've ordered every one of them. <img src="/forums/images/graemlins/lol.gif" alt="" />