Kohler 7-9EFKOZD Service Manual

TP-6774 2/14a 39Section 6 Troubleshooting
Problem ReferenceCorrective ActionPossible Cause
Stops
suddenly
Fault shutdown Check for a fault shutdown code on the controller’s
display. Correct the fault and then reset the controller.
Section 7.10.1
Section 7.10.2
Section 8.14
No fuel Check the fuel supply. —
Fuel line restriction Inspect fuel lines and fuel filter for blockage. —
Blown controller fuse (F2) Replace fuse. Check wiring to the controller. Section 8.15
Section 10
Blown auxiliary winding fuse (F1) Replace fuse. If fuse blows again, test generator
components.
Section 8.15
Section 10
Engine overheated (hot engine
only)
Check air intake, fuel, oil level, air inlet/outlet. O/M and I/M
Low oil pressure (LOP) sender Attempt startup. Shutdown should say “Oil Pres Low
Shutdwn” if unit shuts down, remove the lead from the
LOP sender and reset the controller. A successful
restart attempt indicates a faulty LOP shutdown sender.
Note: Check the engine oil pressure before performing
the test and/or replacing the LOP shutdown sender.
Section 8.14.2
Engine S/M
Engine overloaded Reduce electrical load. I/M
Loss of generator output voltage
to c ontroller
Check connections at P2 plug.
Check continuity of AC sensing leads 11 and 44 (for
1-phase models) or leads V7, V8, and V9 (for 3-phase
models).
Section 10
Section 8.9
Intermittent wiring connections Inspect fuel pump wiring to ensure good connections.
—
BlownF1fuse Troubleshoot rotor and stator assembly and wiring. Section 8.8
Section 8.9
Section 10
Operates
erratically
Governor adjustment incorrect Adjust the governor stability. Section 4.4
Fuel line restriction Check fuel lines, filter, and pump.
—
Inadequate cooling (hot engine
only)
Inspect air inlet and outlet. —
Carbon buildup in engine Clean cylinder head. Engine S/M
Engine valves not seating
correctly
Check cylinder pressures with leakdown test. Inspect
valves and valve seats.
Engine S/M
Lacks
power
Air intake restriction, inadequate
cooling
Inspect air intakes and exhaust for obstructions. —
Generator overloaded Reduce load. —
Engine not running at rated rpm Check controller configuration setting. Adjust the
governor speed.
Section 4.4
Engine power loss Refer to the Engine Service Manual for troubleshooting
and repair instructions.
Engine S/M
Governor malfunction or
misadjustment
Test/readjust the governor. Section 4.4
Overheats Inadequate cooling Inspect cooling system for air intake obstructions.
Check the engine coolant system for blockage and
clean as necessary.
—

Kohler 7-9EFKOZD Specifications

General

Brand	Kohler
Model	7-9EFKOZD
Category	Marine Equipment
Language	English