Is it compression relief or something else - 28D7070123-01 11.5HP

[Fish]

Take the head off, and remove all of the carbon built up in the combustion chamber.
The engine should crank easier after you do this.

 

[MowSlow]

I cleaned the innards with some carb cleaner, oiled some things, put it all back together, recharged the battery and now it runs. I have no idea what I did, but thanks for all the tips.