Electronic Governor System; Electronic Governor Check Feature; Servicing The Spark Plugs - Briggs & Stratton 40689 Manual De Instalación Y Operación

20. Push the ON/OFF Switch on the back of the generator to
the "ON" (I) position.
21. Set the generator mode to AUTO.
23

Electronic Governor System

The engine electronic governor system allows for improved
control and increased generator performance compared
to mechanically governed systems. The result is a smooth
steady-state operation without the "hunting" common to
many mechanical governors. The system also reduces
speed variations under engine loading and unloading and
significantly reduces frequency fluctuation experienced when
the engine is under higher loads.
The electronic governor system is composed of a stepper
motor (B, Figure 24), stepper motor throttle control linkages
(C), and throttle side linkage (A). The control board contains a
digital controller that processes engine speed information and
sends appropriate commands to the stepper motor to control
the position of the engine throttle.
Since the electronic governing system controls the engine
throttle demand based on generator load, the following
service codes and/or conditions can be related to an
electronic governing system issue:
• Engine Does Not Start
• Over Speed
• Under Frequency
• Unstable No Load Engine Control
While troubleshooting any of these conditions, a verification
of the electronic governor system can be initiated through the
control panel – Actuator Test.
32
24

Electronic Governor Check Feature

The generator has an electronic governing check feature that
will turn on the stepper motor and move the throttle linkage
clockwise and counterclockwise within the throttle limits. The
test will rotate the stepper motor and move the throttle arm
between the wide open throttle and dead idle limits for up to
10 seconds. This will allow visual verification that the stepper
motor is functioning correctly and the control linkages are
connected. The engine will not attempt to start during this
test. If the stepper motor does not move, or if a linkage binds,
then service will be required.
NOTICE: If stepper motor does not move, please make sure
the stepper motor connector is attached.

Servicing the Spark Plugs

WARNING
Accidental engine spark can cause an electric shock
or fire and could result in entanglement, traumatic
amputation or laceration.
Before you make adjustments or repairs:
• Disconnect the spark plug wire and keep it away from
the spark plug.
• Disconnect the battery wire from the negative battery
terminal (only engines with electric start.)
• Use only the correct tools.
When you check for spark:
• Use an approved spark plug tester.
• Do not check for spark with the spark plug removed.
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