Anyone familiar with this Honda Carb?

There are a million U-Tube videos about how to adjust the governor and some of the better ones will show you how to test the governor.
A lot easier to watch than explain.

Pretty sure that's the first time I've seen a metering jet (just under the idle speed adjust) open to outside air on a carb.

Okay I was able to get the rpms down via the plastic idle screw. However the rpms stay the same regardless of speed fast or slow. The only exception is when the blades are engaged I am able to change the speed. The governor arm doesn't move much until I turn it to off. I have a new governor spring installed and confirmed that the governor rod and spring is installed correctly. The rest of the springs seem to be doing their job.Does that make since to you?