Kohler 6VSG Service Manual page 61

Problem Possible Cause
Erratic Air cleaner clogged Check air filter element.
operation
Spark plug(s)
Spark plug wire(s)
Fuel line restriction
Fuel mixture
adjustment
incorrect
Governor
adjustment
incorrect
Ignition system
Inadequate cooling
(hot engine only)
Other engine
service required
High output Incorrect controller
voltage settings
Incorrect voltage
calibration
Loose voltage
sensing
connections
W/D = Wiring Diagram(s) (Section 7)
I/M = Generator Set Installation Manual
S/S = Generator Set Specification Sheet
TP-6844 1/13
Test
Check spark plug condition and
gap.
Check spark plug connections and
wires.
Check fuel lines.
Check fuel pipe size.
Use oxygen sensor to check fuel
mixture.
Check governor operation.
Test ignition system according to
instructions in engine service
manual.
Check air inlet and outlet.
See engine service manual.
Check genset model, engine
model, system voltage, and other
controller settings. *
Check the voltage calibration. *
Check connections: stator leads
V7, V8, V9, and P2 controller
connection.
Engine S/M = Engine Service Manual
O/M = Generator Set Operation Manual
Corrective Action
Replace element.
Replace or regap plugs.
O/M
Tighten connections. Replace
damaged spark plug wires.
Clear restricted fuel lines.
Contact fuel supplier to install
larger diameter pipe.
Adjust fuel mixture.
Adjust governor.
Service ignition system according
to instructions in engine service
manual.
Clear air inlet and outlet.
Service according to instructions
in engine service manual.
Adjust the controller settings. *
Adjust the voltage calibration. *
Tighten connections.
Section 4 Troubleshooting
Reference
O/M
Engine S/M
—
Section 5.8.2
Section 5.8
Section 5.6
Section 3.3
Engine S/M
—
Engine S/M
Section 3.3
Section 3.7
W/D Section 7
61