Kohler HD Series Service Manual page 35

Electronic Ignition System Tests (Electric Start)
1. Disconnect cap from spark plug and attach it to
terminal end of spark tester. Attach tester spring clip
to a good ground, not to spark plug. With ignition
switch ON, crank engine to a minimum of 350-450
RPM while observing fi ring tip of tester.
Condition
Visible and/or audible
sparks are produced.
Visible and/or audible
sparks are not produced.
2. Remove retractable starter and engine cover; refer
to Disassembly/Inspection and Service. Disconnect
kill lead from ignition module. Repeat spark test
(step 1).
Condition
Spark is now present.
Still no spark.
Wiring Diagram-Electric Start with Retractable Starter, No Charging System
B
A Ignition Module
E Starter Motor
14 690 10 Rev. --
Conclusion
Ignition system is good.
Install a new spark plug
and try to start engine. If it
still will not start, check
other possible causes
(fuel, compression, etc.).
Test kill lead circuit (step
2).
Conclusion
Check for a shorted lead
in kill circuit or a faulty
switch (step 4).
Test ignition module (step
3).
A
C
B Spark Plug
12 Volt Battery (OEM
F
Supplied)
KohlerEngines.com
3. Set an ohmmeter to Rx1K or Rx10K scale and zero.
Connect one ohmmeter lead to module kill lead tab
and connect other lead into spark plug cap.
Resistance should be 5-15 K ohms. If resistance is
not in this range, replace ignition module.
4. Test ignition/key switch following equipment
manufacturer's instructions. Refer to equipment
manufacturer's manual.
NOTE: Observe following guidelines to avoid damage to
electrical system and components:
● Make sure battery polarity is correct. A negative (-)
ground system is used.
● Make sure all ground connections are secure and in
good condition.
● Disconnect both battery cables before doing electrical
welding on equipment powered by engine. Also,
disconnect other electrical accessories in common
ground with engine.
● Prevent stator (AC) lead (if equipped) from touching or
shorting while engine is running. This could damage
stator.
E
D
C Brake Micro Switch
Electrical System
F
+
Switch/Key Switch
D
(OEM Supplied)
35