Was it running and shut down and was froze or when you went to restart it was frozen? Two things I have seen cause this other than a seized engine. One - chain bound up. Remove side cover and inspect chain mechanism. Two- the pull cord is bound up. Remove the pull cord cover and inspect.
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Was it running and shut down and was froze or when you went to restart it was frozen? Two things I have seen cause this other than a seized engine. One - chain bound up. Remove side cover and inspect chain mechanism. Two- the pull cord is bound up. Remove the pull cord cover and inspect.