Generac 04673-2 Voltage Regulator Adjustment, 3 - Single Cylinder Engine Governor Adjustment

Section 2 — Post Installation Start-up and Adjustments

Generac Air-cooled 7 kW, 12 kW and 15 kW Generators

6.When frequency is correct at no load, check the AC voltage reading. If voltage is incorrect, the volt- age regulator may require adjustment.

Figure 2.3 — Single Cylinder Engine Governor

Adjustment

GOVERNOR

SHAFT

GOVERNOR	ADJUST
CLAMP
	SCREW
BOLT

7.Restart the unit.

8.Slowly turn the idle adjust screw to adjust the no- load idle frequency to 63-63.5 Hz.

9.The governor is now set.

Figure 2.5 — V-twin Full Load Speed Adjust

Screw

Full Load Speed Adjust Screw

◆2.7.2 12 KW AND 15 KW UNITS

1.Loosen governor clamp bolt (See Figure 2.4).

Figure 2.4 — V-twin Engine Governor

Adjustment

Idle Spring

Governor

Shaft

(Rotate

Clockwise)

Governor Clamp Bolt	No Load Idle
	Adjustment Screw

2.Completely remove the idle spring.

3.With governor arm at wide open throttle position, rotate governor shaft fully clockwise. Tighten clamp bolt to 84 inch-pounds.

4.Start unit and apply full load. Use full load speed adjust screw (Figure 2.5) to adjust frequency to 58 Hz.

5.Remove load, stop engine, loosen the idle adjust screw and reconnect the idle spring.

6.Using a hand, push the governor arm to the closed throttle position. Make sure the idle spring does not stretch at all.

◆2.7.3 ADDITIONAL CORROSION PROTECTION

Periodically spray all engine linkage parts and brack- ets with corrosion inhibiting spray such as WD-40 or a comparable product.

2.8VOLTAGE REGULATOR

ADJUSTMENT

With the frequency between 62-63.5 Hertz, slowly turn the slotted potentiometer (Figure 2.6) until line voltage reads 244-252 volts.

NOTE:

Remove the access panel on top of the control panel to adjust the voltage regulator.

Figure 2.6 – Voltage Adjustment Potentiometer

Generac® Power Systems, Inc. 13