Engine Governor Adjustment; Kw Units; Kw And 15 Kw Units - Generac Power Systems Guardian 04758-2 Installation And Owner's Manual


Do not make any unnecessary adjustments.
Factory settings are correct for most applica-
tions. However, when making adjustments, be
careful to avoid overspeeding the engine.
If this procedure or equipment are not available,
locate the nearest Authorized Dealer and they can
perform the adjustments.
A service fee may be charged for this adjustment.
2.7

ENGINE GOVERNOR ADJUSTMENT

If both AC frequency and voltage are correspondingly
high or low, adjust the engine governor as follows:
2.7.1

7 KW UNITS

1. Loosen the governor clamp bolt (Figures 2.3 and
2.4).
2. Hold the governor lever at its wide open throttle
position, and rotate the governor shaft clockwise
as far as it will go. Then, tighten the governor
lever clamp bolt to 70 inch-pounds (8 N-m).
3. Start the generator; let it stabilize and warm up
at no-load.
4. Connect a frequency meter across the generators
AC output leads.
Figure 2.3 — Single Cylinder Engine Governor
Adjustment
GOVERNOR
SHAFT
GOVERNOR
CLAMP
BOLT
Section 2 — Post Installation Start-up and Adjustments
NOTE:
SECONDARY
ADJUST SCREW
PRIMARY
ADJUST
SCREW
Air-cooled 7 kW, 12 kW and 15 kW Generators
5. Turn the primary adjust screw to obtain a fre-
quency reading of 61.5 Hz. Turn the secondary
adjust screw to obtain a frequency reading of
62.5 Hz.
6. When frequency is correct at no load, check the
AC voltage reading. If voltage is incorrect, the volt-
age regulator may require adjustment.
2.7.2
1. Loosen governor clamp bolt (See Figure 2.4).
Figure 2.4 — V-twin Engine Governor
Governor
Shaft
(Rotate
Clockwise)
Governor Clamp Bolt
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.
Figure 2.5 — V-twin Full Load Speed Adjust

12 KW AND 15 KW UNITS

Adjustment
Idle Spring
No Load Idle
Adjustment Screw
Screw
Full Load Speed Adjust Screw
13