Service Manual

31
Electrical System
66 690 01 Rev. C KohlerEngines.com
A Accessory (Yellow) B Battery (Red) C Starter (Blue/Red) D Run (Red)
E Ignition Kill (White) F
Key Switch Ground
(Black)
G Ground H Starter
I Battery J Accessory K Key Switch L Ignition Kill
M Run N Yellow O Connector P Starter Solenoid Stud
Q Starter Solenoid Tang R Starter Assembly S Fuse T Red
U Black V White W Carburetor X
Intake Manifold
Screw
Y Ground (Black) Z Oil Sentry
TM
Light AA Carburetor Solenoid AB
Regulator Recifi er (15
Amp)
AC Regulator Connector AD AC AE B+ AF Stator AC (White)
AG Purple AH
Regulator Rectifi er
(25 Amp)
AI
Blower Housing
Safety Switch
AJ Spark Plug(s)
AK Ignition Module(s) AL
Flywheel Stator
Assembly
AM Coolant Temp. Switch AN Oil Pressure Switch
AO Orange AP Coolant Temp. Gauge AQ
Coolant Temp.
Over-heat Alarm
AR Blue
AS
Accessory Terminal
(+)
Electronic Ignition Systems Tests
Special Tools Required:
NOTE: Ignition tester must be used to test ignition on these engines. Use of any other tester can result in inaccurate
fi ndings. Battery on unit must be fully charged and properly connected before performing tests (a battery that
is hooked up or charged backward will crank engine but it won’t have spark). Be certain drive is in neutral and
all external loads are disconnected.
● Hand tachometer.
● Ignition tester.
● Automotive timing light.
● Multi-meter (digital).
Specifi cations Required:
● 0.76 mm (0.03 in.).
Test Ignition Systems
NOTE: If engine starts or runs during testing, you may need to ground kill lead to shut it down. Because you have
interrupted kill circuit, it may not stop using switch.
Isolate and verify trouble is within engine.
1. Locate connectors where wiring harnesses from engine and equipment are joined. Separate connectors and
remove white kill lead from engine connector. Rejoin connectors and position or insulate kill lead terminal so it
cannot touch ground. Try to start engine to verify whether reported problem is still present.
Condition Possible Cause Conclusion
Problem goes away. Electrical System Check key switch, wires, connections,
safety interlocks, etc.
Problem persists. Ignition or Electrical System Leave kill lead isolated until all testing
is completed.
Identify white kill lead of engine
wiring harness connector. Establish
a connection to a known good
ground location. Engine should kill
completely. If not or only one cylinder
is affected, test ignition modules and
white kill lead connection.