Kohler 125EOZ/100EFOZ, Service Manual, Page: 34 / 148

TP-5737 5/01
20 Section 4 Troubleshooting
T
rouble
S
ymptoms
Doesnot
crank
Cranks but
doesnot start
Startshard
Noor low
outputv oltage
Stops
suddenly
Lack spower
Overheats
Lowoil
pressu re
Highfuel
cons umption
Exce ssive or
abnormalnois e
Probable
Causes
Recommended
Actions
Section
o
r
Publication
Reference*
Controller
x
Controller
m
aster
switch
in
the
OFF/RESET
position
Move
the
c
ontroller
m
aster
switch
to
the
RUN
or
AUT
O
position.
Section
2
x
x
x
Controller
fuse
b
lown
Replace
the
blown
c
ontroller
fuse.
If
the
fuse
blows
again,
troubleshoot
the
c
ontroller
.
[
Section
2
,
W/D
x
x
Controller
c
ircuit
breaker
tripped
Reset
the
controller
c
ircuit
breaker
.
Section
2
x
Controller
m
aster
o
r
s
tart/stop
switch
inoperative
Replace
the
controller
m
aster
o
r
s
tart/stop
switch.
—
x
Controller
fault
T
roubleshoot
the
c
ontroller
.
[
S
e
c
ti
o
n5o
r6
x
x
Controller
c
ircuit
board(s)
inoperative
Replace
the
controller
c
ircuit
board.
S
e
c
ti
o
n5o
r6
Cooling
S
ystem
x
x
Air
openings
clogged
Clean
the
a
ir
openings.
—
x
Impeller
inoperative
Replace
the
impeller
Gen.
O/M
x
x
Seawater
strainer
clogged
or
restricted
Clean
the
s
trainer
.
Gen.
O/M
x
High
temperature
s
hutdown
Allow
the
engine
to
cool
down.
Then
troubleshoot
the
cooling
system.
Eng.
O/M
x
Low
coolant
level
s
hutdown,
if
equipped
Restore
the
coolant
to
normal
operating
level.
Gen.
O/M
x
Coolant
level
low
Restore
the
coolant
to
normal
operating
level.
Gen.
O/M
x
Thermostat
inoperative
Replace
the
thermostat.
Eng.
S/M
x
Cooling
w
ater
pump
inoperative
T
ighten
or
replace
the
belt.
Replace
the
water
pump.
Eng.
O/M
o
r
S
/M
*
S
ec./Section—numbered
section
o
f
this
m
anual;
A
TS—Automatic
T
ransfer
S
witch;
Eng.—Engine;
Gen.—Generator
Set;
I/M—Installation
Manual;
O
/M—
Operation
M
anual;
S
/M—Service
Manual;
S
/S—Spec
Sheet;
W/D—Wiring
D
iagram
Manual
[
Have
an
authorized
service
d
istributor/dealer
perform
this
service.