I was looking around inside my crank case and fishing around with a magnet and pulled a POP RIVET ! out of my mag side crank case. It was hiding under the fuel mixin the bottom area of the case under where the connecting rod bearing goes. **** a brick says I....So now my dander is up and I split the cases for inspection. Nothing new. How the hell did that get there? Apparrently the motor did not run with this in it near as I can tell. No sign of chew on the rivet,crank or cases. Whew to say the least. Makes ya wonder WTF! Well now I am resting a little easier. Thinking that it might be time to buy a pit bull for the shop. Pistons and cylinders were fine save the reason they were off in the first MF'n place. No snow now weird **** is happening!