So I played with it a little today. I have video/pics I can post tomorrow, but right now I'll just try to describe it:
Theres a lever for the choke that you can push, which will only give you a partial choke when you push it all the way. When you do, I *think* it misfires less. The RPMs are still inconsistent but it seems like it might not be misfiring as much when I do that.
As far as the throttle itself, that lever is SUPER sensitive. The RPMs are probably going up and down just from the vibrations moving that lever. When I push it with my finger, I can easily, with the lightest of pressure, lower the RPMs all the way down to nearly idle, or rev it up way past normal running RPM. Which obviously I only did for a second at a time.
I was under the impression that these engines operate at wide open throttle? But if that were the case, then pushing that lever would not have been able to make it rev higher?
I have video of all of this, while its running with me poking at it. I'll post tomorrow.