Kohler Command PRO CS, Service Manual

Page: 59 / 162

8.3
Section 8
Electrical System and Components
8
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.
Electronic TCI (Transistor Controlled
Ignition) System
These engines are equipped with a dependable
electronic TCI system providing:
• Maintenance free operation.
• Strong spark output.
• Stable, controlled ignition timing.
The system consists of the following components:
• A magnet assembly which is permanently
affixed to the flywheel.
• A TCI module which mounts on the engine
crankcase.
• An engine stop switch which grounds the
module to stop the engine.
• A spark plug.
Electric Start Engines also contain:
• An electric starter motor.
• A 3-position starter switch.
• A starter solenoid.
• Wiring harness with fuse.
• Rectifier-Regulator.
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
module induces a high voltage in its secondary
windings. This high voltage creates a spark at the tip
of the spark plug. This spark ignites the air-fuel
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.
In the event starting problems should occur which are
not corrected by replacing the spark plug, refer to the
‘‘Troubleshooting Guide’’ for trouble analysis
procedures.
Oil Sentry
™
Control System
Most engines are equipped with an Oil Sentry ™ oil
monitor control system. When the oil level within the
crankcase falls below the safe level, the engine stops
automatically. Unless the oil level is brought up to the
proper level the oil warning light will flicker for a few
seconds when attempting to start, and the engine will
not start. See Figure 8-2.
Figure 8-2. Cutaway Showing Proper Oil Level.
Oil Sentry
™
systems typically consist of the following
components:
• An oil warning control unit (black box).
• An oil level float switch.
• An indicator light.
Proper
Oil Level
Bring Level Up
To Point of
Overflow
Low Oil
Level