Engine Service Manual

Fuel System
4532 690 03 Rev. I KohlerEngines.com
Troubleshooting eChoke
™
Related Causes
Condition Possible Cause Conclusion
Engine starts hard, runs rough, or
stalls at idle speed.
Choke not closing/moving
a. Incorrect set up of stepper
motor/link/bracket to
carburetor.
b. Broken or missing link.
Stepper motor/bracket/link assembly
must allow for full travel, make sure
link is located properly and
connected.
c. Loss of constant power or
switched power.
d. Loss of system ground.
e. Fusible link is open.
f. Stepper motor not functioning
or shaft has fallen out of
motor.
g. Electronic component in
Master ignition/control module
is not functioning.
Bad wire harness connection, fusible
link failure.
Component failure in Master
controller/ignition.
Bad Master Controller harness.
Engine runs rich (indicated by black,
sooty exhaust smoke, misfi ring, loss
of speed and power, governor
hunting, or excessive throttle
opening).
Choke partially closed during
operation.
a. Incorrect set up of stepper
motor/link/bracket to
carburetor.
b. Broken or missing link.
Stepper motor/bracket/link assembly
must allow for full travel, make sure
link is located properly and
connected.
c. Loss of constant power or
switched power.
d. Loss of system ground.
e. Fusible link is open.
f. Stepper motor not functioning
or shaft has fallen out of
motor.
g. Electronic component in
Master ignition/control module
is not functioning.
Bad wire harness connection, fusible
link failure.
Component failure in Master
controller/ignition.
Bad Master Controller harness.
Engine runs lean (indicated by
misfi ring, loss of speed and power,
governor hunting, or excessive
throttle opening).
Key integrated component in Master
ignition/control module is not
functioning.
Bad ignition module on specifi c
cylinder.
Incorrect set up of stepper motor/link/
bracket to carburetor.
Stepper motor/bracket/link assembly
must allow for full travel, make sure
link is located properly and
connected.