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Electrical System
20 690 01 Rev. F KohlerEngines.com
As Kohler blade stop stator brake circuit often is
operated in conjunction with other application circuits,
relay in Kohler circuit is specially confi gured with a 680
ohm resistor in parallel with relay coil. This is done to
negate transient voltage signals that would be normally
created by interrupting relay current once relay has been
activated. Therefore, relay replacement must only be
made with properly identifi ed relay.
Troubleshooting-Stator Brake System
Stator Brake and Relay Harness Connections
A
B
B
B
C
D
E
F
A Stator Assembly B Wiring Harness
C
Stator Leads to
Rectifi er-Regulator
D Stator Leads
E Wire Tie (Black) F
Push Wing Mount
(Black)
Problems that could occur with Kohler portion circuit
generally could be caused by two component failures
or an incorrect relay replacement, which will create
following conditions.
To test for dead battery:
Brake relay has failed and is keeping stator shorted, so
no charge current can be passed from rectifi er-regulator
to battery, eventually allowing battery to discharge.
1. Check battery voltage using a test meter with
application off.
2. Check battery voltage using a test meter with
application operating at maximum speed.
Battery voltage should increase from engine off condition
to engine full speed condition.
Condition Conclusion
Voltage does not increase. Shut down engine, remove
relay from its socket
and re-test at full engine
speed.
If battery voltage does
not increase with engine
operating, problem is likely
not with stator brake relay.
Continue testing stator and
rectifi er-regulator.
To test engine that will crank but will not start:
Brake stator relay is interacting with application safeties
or reverse mow electronics, preventing normal engine
start up.
1. Remove brake relay from its socket and attempt to
restart engine.
Condition Conclusion
Engine starts. Relay is not correct for this
application or transient
protection resistor has
failed. Replace relay with
correct component.
Engine does not start. Problem may exist with
application reverse mow
circuit, application safeties,
or with key switch keeping
ignition shutdown line tied
to engine ground.
2. Remove engine shutdown (kill) lead from application
wire harness and attempt to start engine again.
Condition Conclusion
Engine does not start. Fuel or ignition problem.