Well, its me again with these Kawasaki's. This time the bolt backed out of the Connecting rod and it busted the block. I looked at all the manuals I could find and none tell me to break down the engine and check the torques on those bolts after so many hours. I took the good conecting rod off and both of those bolts were almost finger tight. This is the first engine I had to blow up. New is 1200 give or take or I can buy the parts to repair for around 400 if I can get the block fixed. So there we have it. First valve guide and now blown. I will tear the other one down and check all of those parts. Let me know your thougts. PS the reason I say it was a bolt backing out is because I found it laying in the bottom of the pan. Just wish I had been running the mower, Prob could have save the block buy shutting it down in time.