Kohler COMMAND CV17-745 Service Manual page 110

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Section 8
Electrical System and Components
B. Capacitive Discharge with Electronic Spark
Advance (SMART-SPARK
SMART-SPARK equipped engines utilize an
™
electronic capacitive discharge ignition system with
electronic spark advance. A typical application (Figure
8-6) consists of the following components:
• A magnet assembly which is permanently affixed
to the flywheel.
• Two electronic capacitive discharge ignition
modules which mount on the engine crankcase
(Figure 8-6).
• A spark advance module which mounts to the
engine shrouding (Figure 8-7).
• A 12 volt battery which supplies current to the
spark advance module.
• A kill switch (or key switch) which grounds the
spark advance module to stop the engine.
• Two spark plugs.
From
Brown Conditioning
Input
Circuit
Coil
Figure 8-7. Block Diagram - Spark Advance Module.
8.6
)
™
V+ (7.2V)
Delay
Circuit
Comparator
Charge Reset
Pump Circuit
www.mymowerparts.com
Figure 8-6. Capacitive Discharge Ignition System
with Spark Advance.
The timing of the spark is controlled by the location of
the flywheel magnet group as referenced to engine top
dead center and the delay created by the spark
advance module.
B+ (12 VDC)
Power
Source
Pulse
Generator
Red
To
Yellow
Semi-Conductor
Switch