How difficult is it to turn an engine by hand?

67Dart273 said

I used to be able to turn an engine by hand like that when younger, but not very far. Depends if the plugs are out.

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There is no way I could turn it by hand with the in, the compression is too high, I guess that means my rings and valves are sealing well. I'm probably just overthinking this, if I could only turn it with a breaker bar I would think there would be a problem.