Kohler 6VSG Service Manual page 58

Problem Possible Cause
Cranks but No fuel
does not
start
Insufficient fuel
pressure
Fuel
regulator/valve
Weak battery
Spark plugs or
spark plug
connections
Loose connection
or open circuit
Air cleaner clogged Check for a dirty air cleaner
Incorrect controller
settings
Ignition system
spark control or
ignition coil
No engine rotation
sensed (check for
an overcrank or
locked rotor fault
shutdown)
W/D = Wiring Diagram(s) (Section 7)
I/M = Generator Set Installation Manual
S/S = Generator Set Specification Sheet
58 Section 4 Troubleshooting
Test
Verify that manual fuel valve is
open.
Check fuel supply tank (LPG).
Check fuel pressure to the
generator set. Verify adequate
fuel pressure and pipe size for the
generator set plus all other gas
appliances.
Check regulator/valve operation.
Check the battery voltage.
Check battery charger
connections and power
connection to the generator set.
Check spark plug wires and
connections.
Check spark plugs.
Check for loose or open
connection at the fuel valve (lead
70A) and at the engine spark
control module (leads IGN and
70B). Check controller/engine
wiring continuity.
element.
Check the genset model setting.
Test according to instructions in
the engine service manual.
Check the cranking circuit.
Engine S/M = Engine Service Manual
O/M = Generator Set Operation Manual
Corrective Action
Open (turn on) manual fuel valve.
Contact fuel supplier to add fuel to
fuel supply tank (LPG).
Contact fuel supplier to replace
fuel supply lines with larger pipe
and replace gas meter if fuel
pressure is insufficient.
Check regulator/valve operation.
Recharge or replace battery.
Tighten loose connections.
Tighten connections. Replace
spark plug wires if damaged.
Replace or clean and re-gap spark
plugs.
Tighten connections. Replace
wiring if damaged.
Replace air cleaner element.
Check and replace air cleaner
element at the intervals shown in
the Service Schedule.
Enter the correct genset model
number setting. Engine model is
selected automatically based on
genset model.
Adjust or replace components as
indicated in engine service
manual.
Troubleshoot engine and
alternator.
Reference
—
Section 5.8.2
Section 5.8
Section 4
O/M
W/D Section 7
O/M
Section 7
O/M
Section 3.3
Engine S/M
Engine S/M
TP-6844 1/13