Section 8. Electrical System And Components - Kohler LH630-775 Service Manual

Electrical System and Components
This section covers the operation, service, and repair
of the electrical system components. Systems and
components covered in this section are:
• Spark Plugs
• Battery and Charging System
• Electronic CD Ignition System
• Electric Starter
Spark Plugs
Engine misfire or starting problems are often caused
by a spark plug that has improper gap or is in poor
condition.
The engine is equipped with the following spark
plugs:
Type: The standard spark plug is a Champion
RC14YC (Kohler Part No. 66 132 01-S).
Equivalent alternate brand plugs can also
be used.
Gap: 0.76 mm (0.030 in.)
Thread Size: 14 mm
Reach: 19.1 mm (3/4 in.)
Hex Size: 16 mm (5/8 in.)
Spark Plug Service
Annually or every 200 hours of operation (whichever
comes first), remove the spark plugs, check condition,
and reset the gap or replace with new spark plugs as
necessary. Every 500 hours of operation, replace the
spark plugs. To service the spark plugs perform the
following steps:
1. Before removing each spark plug, clean the area
around the base of the plug to keep dirt and
debris out of the engine.
Electrical System and Components
Section 8
2. Remove the plug and check its condition. See
"Inspection" following this procedure. Replace
the plug if necessary.
NOTE: Do not clean spark plug in a machine
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 8-1.
Wire Gauge
® Spark Plug
Ground
Electrode
Figure 8-1. Servicing Spark Plug.
4. Reinstall the spark plug into the cylinder head
and tighten to 24.4-29.8 N·m (18-22 ft. lb.).
using abrasive grit. Some grit could
remain in the spark plug and enter the
engine causing extensive wear and
damage.
0.76 mm
(0.030 in.) Gap
Section 8
8
8.1