Well, it's back to its old tricks. Hunting under a load. It will run one AC just fine. Add the second AC and it starts to surge. I messed with the altitude screw and it didn't seem to affect it. I turned the idle screw in so the throttle would stop bouncing against it as the governor surged. That cured it immediately, but as soon as the load was gone it seemed to be idling way too fast. Unless it was idling too low to begin with?
I assume there's some sort of regulator in these things? That is, if it's idling fast the voltage is still where it should be @ around 120?