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Check Spark Plug
Annually or every 100 hours of operation, remove the
spark plug, check condition, and reset the gap or
replace with new plug as necessary. The original plug
is an NGK BPR4ES. The Champion
®
equivalent of that
NGK plug is RN14YC. The service replacement is
Champion
®
RC14YC (Kohler part No. 66 132 01-S).
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 plug in a machine
using abrasive grit. Some grit could
remain in the spark plug and enter the
engine causing extensive wear and
damage.
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 14.
4. Reinstall the spark plug into the cylinder head.
Torque the spark plug to 20 N·m (14 ft. lb.).
Ground
Electrode
Spark Plug
0.76 mm
(0.030 in.) Gap
Wire Gauge
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 gasoline vapors are
present.
NOTE: Do not apply 12 volt DC to kill terminal of
ignition module.
Fuel Valve
Engines are equipped with a fuel valve and integral
screen filter located at the outlet of the fuel tank. See
Figure 15. It controls and filters fuel flow from the tank
to the carburetor.
Every 100 hours of operation clean filter screen and
cup of any accumulated debris as follows:
CAUTION!
Never use or be near fuel or solvent while smoking or
in the vicinity of an open flame.
1. Stop the engine.
2. Turn the fuel valve lever to ‘‘off.’’
3. Remove the fuel valve cup and gasket.
4. Clean the cup with solvent and wipe it off.
5. Check the gasket, replace if damaged.
6. Reinstall the gasket and fuel valve cup.
CAUTION!
Be sure the fuel valve cup is tightened securely.
Figure 14. Servicing Spark Plug.