Hi Glen & welcome to THE forum....
I 'think' it is an error in terminology, possibly, but ... "cranks", "will not crank", implies that the starter is not turning the engine... that may be what you meant.
And that can happen when the engine has been OVER Heated, things expand at different rates and the aluminum piston with steel rings in a steel cylinder, will seize up because it no longer fits...
If you are running normal mineral oil, you likely cooked the oil... This is another reason to run a good synthetic, (more heat tolerance, before it breaks down)...
Over heating an engine is not good, heating one to the point it slows to seize is bad... It easily will put hundreds of hours additional ware in just a few seconds...
Not a lot you can do other than switch to a high quality synthetic oil, this engine will need all the help it can get to have a long life... :smile:KennyV