Kohler CH730-745 User Manual download pdf (Page 13)

Fuel Filter

Carbureted Engines: 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.

EFI Engines: A special, high volume, high pressure

filter with greater filtration capabilities and internal

surface area is used. See Figure 15.

Figure 14. Servicing Spark Plug.

4. Reinstall the spark plug into the cylinder head.

Torque the spark plug to 24.4-29.8 N·m

(18-22 ft. lb.).

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 System

WARNING: Fuel System Under Pressure!

The EFI fuel system operates under high pressure,

and the fuel filter and fuel line used must be approved

system components only. Use of substitute parts can

result in system failure, gasoline leakage and possible

explosion.

Wire Gauge

Ground

Electrode

Spark Plug

0.76 mm

(0.030 in.) Gap

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.

Figure 15. EFI Fuel Filter and Line.

Replacement is recommended every 1500 hours, or

more frequently under extremely dusty or dirty

conditions. When replacement is necessary, always

use genuine Kohler parts.

Fuel Line

EFI Engines: A special fuel line, capable of

withstanding the high pressure of the EFI fuel system,

is used (must meet SAE R9 specifications). See Figure

15. If fuel line must be replaced, see your Kohler

Engine Service Dealer.

Carburetor Troubleshooting and

Adjustments

NOTE: Carburetor adjustments should be made only

after the engine has warmed up.

The carburetor is designed to deliver the correct

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

conditions. To comply with current emission

regulations, the fuel mixture settings are made at the

factory and cannot be adjusted.

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.

Fuel Filter

Fuel Line

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Kohler CH730-745 User Manual Page 13

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