Electronic Magneto Ignition System - Kohler CV11-16 Service Manual

Electronic Magneto Ignition System, CV11-15, CV460-465, CV490-495 Engines
Air Gap
0.2-0.3 mm
(0.008-0.012 in.)
Kill Switch or Off
Position of Key Switch
Figure 8-2. Electronic Magneto Ignition System, CV11-15, CV460-465, CV490-495 Engines.
CV11-15, CV460-465, CV490-495 engines are
equipped with a dependable electronic magneto
ignition system. The system consists of the following
components:
• A magnet assembly which is permanently affixed
to the flywheel.
• An electronic magneto ignition module which
mounts on the engine crankcase.
• A kill switch (or key switch) which grounds the
module to stop the engine.
• A spark plug.
Ignition Module
Magnet
Flywheel
Electrical System and Components
Spark Plug Boot
Spark Plug
Lamination (A)
Operation
As the flywheel rotates and the magnet assembly
moves past the ignition module, a low voltage is
induced in the primary windings of the module. When
the primary voltage is precisely at its peak, the primary
circuit is interrupted, inducing a high voltage in the
secondary windings. This high voltage creates a spark
at the tip of the spark plug, which ignites the fuel-air
mixture in the combustion chamber.
The timing of the spark is automatically controlled by
the module. Therefore, other than periodically
checking/replacing the spark plug, no maintenance,
timing, or adjustments are necessary or possible with
this system.
Section 8
Spark Plug
Terminal (C)
Kill Terminal (B)
8
8.3