I bought a used Compact 24 (mint) and the engine has no compression so I did a swap. Today I was curious why this mint 9.5 lbs. tq. engine bit the dust. Now I know. I pulled it apart and the rod was broke clean off and the crank is damaged a little but the oil was clean as a whistle. Did the rod just fatigue? everything inside this engine looks like brand new, the block had a small hole that easily fixed but dang is a rod and crank expensive so it looks like a parts engine for my kids 24. This Ariens had only been used 6 times and the guy said it just shut off and he had not used it in a few years. I think it's time these engines have steel rods and bearing inserts to get rid of the breakage problem. I know my buddies that race who used aluminum rods said they are just a cycle life away from blowing up.