Generators - Briggs & Stratton 86262GS Familiarization & Troubleshooting Manual

Portable Generator Familiarization & Troubleshooting Guide
Section 3 • Generator Diagnostics and Adjustments
Adjustment at "Low Idle" Frequency
NOTE:
The "Low Idle" Frequency adjustment
should only be done after successfully completing
"No Load" and "Rated Load" adjustments.
With the unit running and no loads connected to the
generator:
• Hold the throttle against the idle speed adjust screw.
• While holding the throttle, turn the idle speed adjust
screw (Figure 3.13) until unit is idling at
24-28 Hertz (for both 50 and 60 Hertz units).
Figure 3.13 — Throttle Restrictor Tang
• Turn the carburetor's idle mixture valve
(Figure 3.14) clockwise (lean) until frequency starts to
drop.
Figure 3.14 — Idle Mixture Adjustment
Take note of this position.
• Turn the idle mixture valve counterclockwise until
frequency starts to drop.
Take note of this position.
• Set idle mixture valve at the midpoint between the two
previous positions.
Idle Control Switch Adjustment
NOTE:
The "Idle Control Switch" adjustment
should only be done after successfully completing
"No Load, Rated Load and Low Idle" frequency
adjustments.
Proceed with the idle control switch adjustments with the
unit running, warmed up and stabilized.
• Set the idle control switch to ON.
Idle control solenoid should pull in and engine frequency
should drop to idle.
• Check the frequency reading.
Engine should be running at 40-45 Hertz.
If not:
• Loosen the four screws that retain the idle control
solenoid mounting brackets.
• Move the brackets toward the engine to increase
frequency or away from engine to decrease frequency.
• Secure bracket screws.
With idle control switch ON and no electrical loads
connected, the unit should be running at its correct idle
frequency of 40-45 Hertz.
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