Capacitive Discharge Ignition System With Spark Advance; Block Diagram - Spark Advance Module - Kohler CH18-745 Service Manual

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Section 8
Electrical System and Components
Key Switch or ''Off''
Position of Key Switch
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 the engine top
dead center and the delay created by the spark advance module.
From
Brown Conditioning
Input
Circuit
Coil
Figure 8-7. Block Diagram - Spark Advance Module.
Operation: The ignition module for this system operates in the same fashion as the fixed timing module,
except the trigger circuit for the semiconductor (L2, Figure 8-5) is replaced by the spark advance module
(Figure 8-7).
8.6
Green
White
Spark
Plug
0.28/0.33 mm
(0.011/0.013 in.)
Air Gap
Flywheel
Delay
Circuit
Comparator
Reset
Charge
Circuit
Pump
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Red
Spark Advance Module
Spark Plug
Ignition Module
Magnet
V+ (7.2V)
Power B+ (12 VDC)
Source
Pulse
Generator
12 Volt Battery
Red
Yellow To
Semi-Conductor
Switch