Need help to set speed on Petter BA1

[rcavictim]

I recently obtained a 6.5 HP, Petter BA1 air cooled engine direct coupled to an 1800 RPM head in a small plant.  Got it fired up and load testing for the first time today and find the unit is running a bit shy of 1800 and I need to bump up the speed about 5 Hz.  I have no info or experience with this engine and cannot identify the speed screw.  Anyone know these machines?

Anyone have a pdf or other file of the service manual for this engine they might care to share?

Thanx!

[rcavictim]

Please cancel my request for assistance with the governor setting.  It wasn't obvious but I finally figured out how to do this.  I now have the speed where I wanted it.   

Thanx.