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Hey Kevin.

Sorry to hear about your old trusted friend. It sure sounds like the connecting rod is trashed.

It's amazing to me that you get no clanking, banging or noise of any kind when you spin the crank. The rod may have broken cleanly away near the crank. With the small end sent north towards the head now the crank can smoothly rotate. If the piston was still attached there would be SOME resistance, and the spark plug would not look hammered.

Now to the question of whether this is the "end of the road". I would pull the bottom end of the case and take a look. If you can disassemble the motor then you can determine what needs to be done.

A new rod, rings and maybe a piston could be worth doing. Extensive case and or cylinder damage would likely not be worth fixing. The only way to tell is to take it apart. One good thing is that these are very simple engines.

I hope this helps,
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