Engine Governor Adjustment - Generac Power Systems 5240 Installation And Owner's Manual

1. Turn off utility power to the main distribution
panel in the house. This can be done by switching
the service main breaker to the off or open posi-
tion.
2. Allow the generator to start. Before loading the
generator, confirm that the No Load Frequency,
with the roof open and door off, is set to 63-63.5
Hz. Transfer load to emergency circuits.
3. Turn on appliances, lights, pumps, etc., that are
on the emergency circuits in an attempt to fully
load the generator. Be cautious not to overload
the generator. Use the following chart as a guide:
Unit 120 Volts
7 kW 50.0 amps
4. When 3/4 load has been achieved. Connect a fre-
quency meter to the output lugs of the generator's
main line circuit breaker.
5. The fuel regulator is fitted with one adjustment
screw. While watching the frequency meter, slowly
turn the adjustment screw clockwise or counter-
clockwise until the highest frequency is read on
the meter. Only limited adjustment is available
because of the set pin. Under no circumstances
should any of the pins be removed (Figure 2.1).
Figure 2.1 — 7kW Fuel Regulator
410cc Engine
Adjustment
Screw
(One Side
Only)
6. When the highest frequency is reached maximum
power has been set. From this point turn the
adjustment screw 1/4 turn counterclockwise. The
regulator is now set.
7. Turn utility power to the main distribution panel
back on. This can be done by switching the ser-
vice main breaker to the on or closed position.
Allow the generator to shut down.
14
Section 2 — Post Installation Start-up and Adjustments
Air-cooled Generators
240 Volts
25.0 amps
Set
Pin

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 the test equipment is not avail-
able, locate the nearest 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

The engine must be OFF to perform steps 1 and
2.
1. Loosen the governor clamp bolt (Figures 2.2).
2. Hold the governor lever at its wide open throttle
position (clockwise), 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.
Figure 2.2 — Engine Governor Adjustment
Single Cylinder Engines
GOVERNOR
SHAFT
GOVERNOR
CLAMP
BOLT
NOTE:
SECONDARY
ADJUST SCREW
PRIMARY
ADJUST
SCREW