GP/GPS 5600A Maintenance426.7 Carburetor Adjustment6.7.1 Start the engine and allow it to warm up to operating temperature.6.7.2 Set the pilot screw (a) two turns out. See Note.6.7.3 With the engine idling, turn the pilot screw (a) in or out to the settingthat produces the highest rpm.6.7.4 After the pilot screw is adjusted, turn the throttle stop screw (b) toobtain the standard idle speed. See Technical Data.Note: On some engines the pilot screw is fitted with a limiter cap (c)to prevent excessive enrichment of the air-fuel mixture in order tocomply with emission regulations. The mixture is set at the factory andno adjustment should be necessary. Do not attempt to remove thelimiter cap. The limiter cap cannot be removed without breaking thepilot screw.6.8 Adjusting Engine SpeedGenerators require a fixed engine speed to maintain the correctvoltage. Engine speed is controlled by a governor which automaticallyadjusts to varying loads on the engine to maintain a constant speed.There is no throttle control.To set the engine to the proper speed:Turn the speed adjusting screw (b) in or out to obtain a no-load speed.See Technical Data.NOTICE: Setting the engine speed too high or too low may damagetools and other appliances attached to the generator.