Fuel System
38
32 690 03 Rev. NKohlerEngines.com
Smart-Choke
™
Components
A
B
C
D
E
F
I
J
K
L
M
O
N
Q
H
P
E
G
A Precleaner B Paper Element C Air Cleaner Base D Evap Hose
E
Smart-Choke
™
Bracket Assembly
F
Adjustable
Thermostat
G
Dual Position
Thermostat
H Solenoid Lead
I Air Cleaner Gasket J Control Assembly K Breather Hose L Stud
M Intake Manifold N
Choke Unloaded
Linkage
O Ignition Module P
Deector Support Tab
(if Equipped)
Q Air Vane Deector
Troubleshooting Smart-Choke
™
Related Causes
Condition Possible Cause Conclusion
Engine starts hard, runs rough, or
stalls at idle speed.
Choke not closing. Check choke lever/linkage to ensure
choke is operating properly.
Check that bimetallic spring actuates
freely.
Engine runs rich (indicated by black,
sooty exhaust smoke, misring, loss
of speed and power, governor
hunting, or excessive throttle
opening).
Choke partially closed during
operation.
Check choke lever/linkage to ensure
choke is operating properly.
Check that air vane is operating
freely.
Choke not opening. Check choke lever/linkage to ensure
choke is operating properly.
Check that air vane is operating
freely.
Check choke thermostat bracket
assembly.