Electrical System
64 24 690 06 Rev. PKohlerEngines.com
A Spark Plug(s) B Oil Pressure Switch C Oil Sentry
™
(Green) D White Kill
E
Flywheel Stator
Assembly
F Ignition Module G CDI/MDI Ignition H
Rectifi er-Regulator
Connector
I Rectifi er-Regulator J Oil Sentry
™
Kill (Green) K Violet B+ L
Solenoid Shift Starter
Assembly
M Starter Solenoid Tang N Starter Solenoid Stud O Fuse P Blue
Q
Alternate Ignition Kill
(–)
R White S Accessory Terminal (+) T Yellow
U Ignition Kill V Red W Carburetor X Carburetor Solenoid
Y Black (Ground) Z Intake Manifold Screw AA Black AB
Oil Sentry
™
Panel
Light/Remote Light
AC Oil Sentry
™
Light AD Connector AE Magneto AF Key Switch
AG Accessory AH Battery AI Starter AJ Ground
AK Key Switch Ground AL Rectifi er AM Blue/Red AN Battery Positive
AO Battery Negative
CDI/MDI Ignition Systems Tests
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.
Special Tools Required:
● Hand tachometer.
● Ignition tester.
● Multi-meter (digital).
Specifi cations Required:
● 0.76 mm (0.030 in.).
Test for Spark
NOTE: If 2 testers are available, testing can be performed simultaneously for both cylinders. However, if only 1 tester
is available, 2 individual tests must be performed. Side not being tested must have spark plug lead connected
or grounded. Do not crank engine or perform tests with 1 spark plug lead disconnected and not grounded, or
permanent system damage may occur.
1. With engine stopped, disconnect 1 spark plug lead. Connect spark plug lead to post terminal of spark tester and
attach tester clip to a good engine ground.
2. Crank engine over, establishing a minimum of 350-450 RPM, and observe tester(s) for spark.
3. Repeat spark test on opposite cylinder if cylinders are being tested individually.
Condition Possible Cause Conclusion
Both cylinders have good spark but
engine runs poorly or existing plug
condition is questionable.
Spark Plug(s) Install new spark plug(s) and retest
engine performance.
1 cylinder has good spark and other
cylinder has no or intermittent spark.
Ignition Test ignition modules and
connections.
Spark on both cylinders but power is
suspect.
Sheared Flywheel Key Check for broken key.
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