So I got it started, it even smoothed out a little bit about 5 minutes into letting the engine run. When it sounded close to normal, I tried to throttle up a little, but no change at all. I could see the throttle lever engaging, but no change to the RPM. At nearly 10 minutes on my timer, I tried to increase the throttle again, but it started to rattle harder so I shut it off.I'd run for 5 minutes,probably a lot of unspent fuel in the cylinders and needs to be cleared out'.