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Electrical System
KohlerEngines.com 20 690 01 Rev. F
Carbon Fouled
Soft, sooty, black deposits indicate incomplete
combustion caused by a restricted air cleaner, over rich
carburetion, weak ignition, or poor compression.
Overheated
Chalky, white deposits indicate very high combustion
temperatures. This condition is usually accompanied
by excessive gap erosion. Lean carburetor settings,
an intake air leak, or incorrect spark timing are normal
causes for high combustion temperatures.
BATTERY
A 12-volt battery with 250 cold cranking amps (cca) is
generally recommended for starting in all conditions. A
smaller capacity battery is often suffi cient if an
application is started only in warmer temperatures.
Actual cold cranking requirement depends on engine
size, application, and starting temperatures. Cranking
requirements increase as temperatures decrease and
battery capacity shrinks. Refer to equipment's operating
instructions for specifi c battery requirements.
Battery Size Recommendations
If battery charge is insuffi cient to turn over engine,
recharge battery.
Battery Maintenance
Regular maintenance is necessary to prolong battery
life.
Battery Test
To test battery, follow manufacturer's instructions.
ELECTRONIC IGNITION SYSTEM
Ignition System Components
A
D
E
F
B
F
G
H
I
C
A
Kill Switch/Off Position
of Key Switch
B Air Gap
C Flywheel D Magnet
E Spark Plug F Ignition Module
G Kill Terminal H Spark Plug Boot
I Spark Plug Terminal
There is 1 type of ignition system used on these engines.
This system uses an ignition module which energizes
spark plug.
This ignition system is designed to be trouble free for
life of engine. Other than periodically checking/replacing
spark plugs, no maintenance or timing adjustments
are necessary or possible. Mechanical systems do
occasionally fail or break down. Refer to Troubleshooting
to determine root of a reported problem.
Reported ignition problems are most often due to poor
connections. Before beginning test procedure, check
all external wiring. Be certain all ignition-related wires
are connected, including spark plug leads. Be certain all
terminal connections fi t snugly. Make sure ignition switch
is in run position.
Fixed Ignition System
This system uses a capacitive discharge (CD) coil.
Ignition timing and spark remains constant regardless of
engine speed. Timing of spark is controlled by location of
fl ywheel magnet group as referenced to engine TDC. A
typical fi xed ignition system consists of:
● 1 magnet assembly which is permanently affi xed to
fl ywheel.
● 1 electronic capacitive-discharge ignition module
which mounts on engine crankcase.
● 1 kill switch (or key switch) which grounds module to
stop engine.
● 1 spark plug.