Kohler Command CH620 Service Manual page 64

Electrical System
A Oil Pressure Switch
E Trigger
Module Speed
I
Advance 22, 25 HP
Rectifi er-Regulator
M
Connector
Q Violet (B+)
U Ignition Kill
Y Solenoid Lead
AC Oil Sentry Light
™
AG Accessory
AK Key Switch Ground
AO Battery Negative
AS Starter Solenoid Tang
Smart-Spark Advance Ignition System
™
SMART-SPARK equipped engines utilize an electronic capacitive discharge ignition system with electronic spark
™
advance. A typical application consists of following components:
● 1 magnet assembly which is permanently affi xed to fl ywheel.
● 2 electronic capacitive discharge ignition modules which mount on engine crankcase.
● 1 spark advance module which mounts to engine shrouding.
● 1 12 volt battery which supplies current to spark advance module.
● 1 kill switch (or key switch) which grounds spark advance module to stop engine.
● 2 spark plugs.
Smart-Spark 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.
● Automotive timing light
● 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.
4. For engines with DSAI or Smart-Spark
(red) lead terminal of DSAI module or Smart-Spark
64
B Oil Sentry (Green)
™
F Ignition Module
J Brown
N Rectifi er-Regulator
Alternate Ignition Kill
R
(–)
V Smart-Spark
™
Z Intake Manifold Screw AA
AD Connector
AH Battery
AL Rectifi er
AP Blue
AT Black (Ground)
, turn key switch to ON position and check for 12 volts at center/power
TM
TM
KohlerEngines.com
C Spark Plug(s)
Flywheel Stator
G
Assembly
K Yellow
O Oil Sentry Kill (Green)
™
S Accessory Terminal (+)
W Red
Black
AE Magneto
AI Starter
AM Blue/Red
AQ Fuse
box.
D Kill
22, 25 HP Smart-
H
Spark Ignition
™
Yellow on Analog
L SAMs Pink on Digital
SAMs
Solenoid Shift Starter
P
Assembly
T White
X Carburetor
Oil Sentry Panel
AB
™
Light/Remote Light
AF Key Switch
AJ Ground
AN Battery Positive
AR Starter Solenoid Stud
24 690 06 Rev. O