That model # show's the machine but NO engine information at all.
Post back the ENGINE model #, make, etc.
Also, most engine are supposed to run at 3,600 RPM's (full throttle).
To increase the RPM's there's a spring attached to the governor.
You have to put MORE tension (just a touch) to increase RPMs.
There may be a Phillip's head screw to adjust or simply bending a tab (attached to that spring)
to increase pressure.