Kohler COMMAND CV13 Owner's Manual - Page 12

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3. Check the gap using a wire feeler gauge. Adjust

the gap by carefully bending the ground electrode.

See Figure 10. Gap CV11-15, CV460-CV493 plugs

to 1.0 mm (0.040 in.). Gap CV16 plugs to

0.76 mm (0.030 in.).

4. Reinstall the spark plug into the cylinder head.

Torque the spark plug to 38.0-43.4 N·m

(28-32 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 gasoline vapors are

present.

Fuel Filter

Most engines are equipped with an in-line fuel filter.

Periodically inspect the filter and replace with a genuine

Kohler filter every 200 operating hours.

Carburetor Troubleshooting and

Adjustments

NOTE: Carburetor adjustments should be made

only after the engine has warmed up.

These engines are equipped with one of two basic types

of fixed main jet carburetors – Walbro or Nikki. See

Figure 11.

Walbro carburetors have a low idle speed screw and a

low idle fuel adjusting needle. Nikki carburetors only

have a low idle speed screw. Certified carburetors will

have fixed idle fuel or a limiter cap on the idle fuel

adjusting needle.

Walbro

Low Idle

Speed Adj.

Screw

Low Idle

Fuel Adj.

Needle

Nikki

Gap

Figure 11. Carburetor.

The carburetor is designed to deliver the correct

fuel-to-air mixture to the engine under all operating

conditions. The main fuel jet is calibrated at the factory

and is not adjustable. The low idle fuel adjusting needle

is also set at the factory and normally does not need

adjustment.

NOTE: To ensure correct engine operation at

altitudes above 1525 meters (5000 ft.), it may

be necessary to have an authorized Kohler

dealer install a special high-altitude jet kit in

the carburetor. If a high-altitude kit has been

installed, the engine must be reconverted to

the original jet size, before it is operated at

lower altitudes, or overheating and engine

damage can result.

Troubleshooting

If engine troubles are experienced that appear to be

fuel system related, check the following areas before

adjusting the carburetor.

• Make sure the fuel tank is filled with clean, fresh

gasoline.

• Make sure the fuel tank cap vent is not blocked

and that it is operating properly.

Low Idle

Speed Adj.

Screw