Kohler 7-9EFKOZD Service Manual

TP-6774 2/14a38 Section 6 Troubleshooting
Troubleshooting Chart
Problem Possible Cause Corrective Action Reference
Generator
set does
not crank
Weak or dead battery Recharge or replace battery. Generator O/M
Battery connections Check for reversed or poor battery connections. —
Open circuit in engine/controller
connections
Check for loose connections.
Check the wire harness continuity.
Section 10
BlownF2fuse Replace fuse; if fuse blows again, check circuit and
components.
Check the controller wiring.
Check the starter solenoid for a stuck solenoid.
Check wiring for open grounds or loose connections.
Also, check for pushed out pins.
Section 8.15
Section 10
Crank relay
Check for 12VDC on lead 71N. Section 10
Check for a good ground connection (lead N). Section 10
Poor ground (--) connection Clean and retighten. —
Starter
Check starter connections. Section 10
Rebuild or replace starter. Engine S/M
Controller Check controller connections and operation. Check for
power to the controller.
Section 7
Section 10
Cranks but
does not
start
No fuel Check the fuel supply. Check the fuel filters for
blockage.
—
Loose connection or open circuit Check for loose or open connections at the fuel pump or
fuel solenoid. Check the controller/engine wiring
continuity.
Section 10
Incorrect controller configuration Check for correct controller configuration settings. Section 7.13
No engine rotation sensed (check
for an overcrank fault shutdown)
Check for locked rotor. Section 8.8
Starts hard
Low battery voltage Check battery voltage, power supply, and operation. O/M
Worn piston rings, valves Check compression. Engine S/M
Glow plug(s) Verify that battery voltage is present at each glow plug
(control wire to ground) while cranking.
To check glow plug condition, remove each glow plug
and measure the resistance from the control wire
connection point to the tip of the glow plug. If the
resistance is approx. 1 ohm, the glow plug is good.
OR
Remove each glow plug, ground the threaded portion of
the glow plug, and crank the unit. If the tip of the glow
plug glows, the glow plug is good.
—
Starts but
shuts
down
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

Kohler 7-9EFKOZD Specifications

General

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