I had the same thing happen, but mine has a little knock or catch at the top of the stroke. If you turn it real slow when it get to the last 1/4" of travel you feel a slight catch then it releases. Someone said at my club it feels like the connection rod has some backlash (play in it). I called ST and they were no help, just said send it back for repairs. I'm not sure if this is something that will cause more damage if I run it??? I'm thinking the worst cause would be that the engine might get hot from the extra friction and not run right, or once the ABC lining heats up and expands, maybe it will go away?? Any ideas guys?

DG