Which video did you take the governor off and put the gas pedal on I am mimicking your build for a friend of mine that is racing in a race on the 22nd of October and I've got the same mower
Just be careful when trying to start anything flooded fluids don’t compress or compress well you will bend a valve loosing power or cause a semi-permanent no start condition. Pull the plug crank crank crank, reinstall. Good to go.