Kohler Aegis LV680 User Manual download pdf (Page 16)

Carburetor Troubleshooting and

Adjustments

In compliance with the government emission

standards, the carburetor is calibrated to deliver the

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

operating conditions. The carburetor cannot be

adjusted, except for low idle speed (RPM). Carburetor

servicing is to be performed by an authorized Kohler

Engine Service Dealer only. See Figure 24.

• Make sure fuel is reaching the carburetor. This

includes checking the fuel lines and fuel pump for

restrictions or faulty components, replace as

necessary.

• Make sure the air cleaner element and precleaner

are clean and properly secured.

• Make sure the air intake screen, blower housing,

and cooling surfaces of radiator are clean and free

of dirt and debris.

• Make sure cooling system is filled to the proper

level.

If, after checking the items listed above, the engine is

hard to start, runs roughly, or stalls at low idle speed, it

may be necessary to adjust or service the carburetor.

Adjust Carburetor

Start the engine and run at half throttle for 5 to 10

minutes to warm up. The engine must be warm before

making final settings.

Low idle speed (RPM) setting:

1. Place the throttle control into the “idle” or “slow”

position. Set the low idle speed to 1200 RPM*

(± 75 RPM) by turning the low idle speed adjusting

screw in or out. Check the speed using a

tachometer.

*NOTE: The actual low idle speed depends on the

application – refer to equipment

manufacturers recommendations. The

standard low idle speed is 1200 RPM.

2. If proper operation is not restored after adjusting

the low idle speed, carburetor servicing by an

authorized Kohler Engine Service Dealer may be

required.

Figure 24. Carburetor.

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.

• If the fuel tank is equipped with a shut-off valve,

make sure it is open.

• If the engine is equipped with an in-line fuel filter,

make sure it is clean. Replace the filter if it is dirty

or restricted.

Fuel Line

Inlet

Idle Speed

Adjusting Screw

Fuel Shut-Off

Solenoid

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Kohler Aegis LV680 User Manual Page 16

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