Electronic Cd Ignition Systems; Operation Of Cd Ignition Systems - Kohler CH18-745 Service Manual

Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
Section 8
Electrical System and Components

Electronic CD Ignition Systems

Ignition
Module
Input
B+ and
Carburetor
Solenoid
Input
Figure 8-3. Electronic CD Ignition System (For Customer Connected Tractor Applications).
The SMART-SPARK ignition system used on some
™
models is an advanced version of the CD ignition
system used on other CH engines. Its operation can
be best understood by first understanding the standard
system and how it works. Since both systems will
continue in use, it is advantageous to understand them
both. The operation of the standard system is
explained first then expanded to cover SMART-
SPARK .
™
8.4
Red
Red
Starter and Red
Carburetor
Green
Solenoid
Input
White
Red
Oil Pressure
Spark
Safety Input
Plugs
Violet B+
Rectifier-
Regulator
www.mymowerparts.com
Carburetor
Solenoid
Oil
Pressure
Safety
Ignition
Modules
White

Operation of CD Ignition Systems

A. Capacitive Discharge with Fixed Timing
This system (Figure 8-3) 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 8-4).
• A kill switch (or key switch) which grounds the
modules to stop the engine.
• Two spark plugs.
Spark
Advance
Module
(Optional)