On my pedestal, I could push the throttle to around 2600 RPMs under load, but it always went down to ~2100RPM. I’d always assumed this was by design, but apparently not!
So I firstly took the compass off and looked at the cable linkages on the control pedestal side
The compass had a light on it, and the wire was getting mushed below the throttle cable so I removed it. Next, I tightened the cable clamp a tad.
And voila. I can run and hold at 2600 RPM loaded, 3100 unloaded.
Of course, I noticed some cable corrosion so THAT needs to be replaced, but that is a different project.