Kohler 6VSG

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