Battery Charging; Ignition System; Check Spark Plugs - Kohler COMMAND 20-25 HP Owner's Manual

7. When element replacement is necessary order
genuine Kohler parts.
CH20-22
47 083 03-S
Clean Air Intake/Cooling Areas
To ensure proper cooling, make sure the flywheel
screen, cooling fins, and other external surfaces of the
engine are kept clean at all times.
Every 100 hours of operation (more often under
extremely dusty, dirty conditions), remove the blower
housing and other cooling shrouds. Clean the cooling
fins and external surfaces as necessary. Make sure the
cooling shrouds are reinstalled.
NOTE: Operating the engine with a blocked flywheel
screen, dirty or plugged cooling fins, and/or
cooling shrouds removed, will cause engine
damage due to overheating.

Ignition System

This engine is equipped with an electronic CD ignition
system. Other than periodically checking/replacing the
spark plugs, 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 plugs, see your
Kohler Engine Service Dealer for trouble analysis.

Check Spark Plugs

Every 100 hours of operation, remove the spark plugs,
check condition, and reset the gap or replace with new
plugs as necessary. Every 300 hours or annually
replace the spark plugs. Replacement spark plugs are
Kohler Part No. 12 132 02-S (Champion
RC12YC). Equivalent alternate brand plugs can also
be used.
1. Before removing the spark plug, clean the area
around the base of the plug to keep dirt and debris
out of the engine.
2. Remove the plug and check its condition. Replace
the plug if worn or reuse is questionable.
NOTE: Do not clean the spark plugs in a
machine using abrasive grit. Some grit
could remain in the spark plug and enter
the engine causing extensive wear and
damage.
12
CH25
24 083 03-S
® type
3. Check the gap using a wire feeler gauge. Adjust
the gap to 0.76 mm (0.030 in.) by carefully
bending the ground electrode. See Figure 10.
4. Reinstall the spark plug into the cylinder head.
Torque the spark plug to 24.4-29.8 N·m
(18-22 ft. lb.).
Wire Gauge
Spark Plug
Ground
Electrode
Figure 10. Servicing Spark Plug.

Battery Charging

WARNING: Explosive Gas!
Batteries produce explosive hydrogen gas while being
charged. To prevent a fire or explosion, charge
batteries only in well ventilated areas. Keep sparks,
open flames, and other sources of ignition away from
the battery at all times. Keep batteries out of the reach
of children. Remove all jewelry when servicing
batteries.
Before disconnecting the negative (-) ground cable,
make sure all switches are OFF. If ON, a spark will
occur at the ground cable terminal which could cause
an explosion if hydrogen gas or LP/gasoline fuel
vapors are present.
Charging of battery should be performed as outlined by
the original equipment manufacturer (OEM) in their
operator's manual.
0.76 mm
(0.030 in.) Gap