Kohler CV1000 User Manual download pdf (Page 34)

5.6

Section 5

Fuel System and Governor

Lean

Rich

Adjust to

Midpoint

Lean

Rich

Adjust to

Midpoint

Left Side

Right Side

Carburetor Adjustments

Adjustment

Ǳȱ ȱȱȱȱȱ¢ȱ

Ğȱȱȱȱȱǯ

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 idle fuel adjusting

needle is also set at the factory and normally does not

need adjustment.

ȘǱȱ ȱȱȱȱȱ

¡¢ȱŗśŖŖȱȱǻśŖŖŖȱĞǯǼȱ¢ȱ

require a special ‘‘high altitude’’ main

ǯȱȱȱȁȁȱȱȂȂȱ

later in this section.

If, however, the engine is hard-starting or does not

operate properly, it may be necessary to adjust or

service the carburetor.

Low Idle Speed (RPM) Adjustment

1. ȱȱȱǻǼȱĴǱȱȱȱĴȱ

control in the “idleȄȱȱȃslowȄȱǯȱȱȱ

low idle speed approximately 300 RPM less than

ȱȱȱęȱȱȱǰȱ

by turning the low idle speed adjusting screw

in or out. Check the speed using a tachometer.

IMPORTANT: The Governed Idle Speed

ȱȱȱ¢ȱĴȱȱȱ

Low Idle Speed.

ȘǱȱ ȱȱȱȱȱȱȱ

the application. Refer to the equipment

manufacturer’s recommendations.

The low idle speed for basic engines is

1200 RPM. To ensure best results when

Ĵȱȱȱȱȱǰȱȱȱ

idle speed should be 1200 RPM (± 75

RPM).

Figure 5-5. Carburetor Adjustment Locations.

Low Idle Fuel Adjustment

Ǳȱ ȱȱȱę¡ȱȱȱȱȱ

caps on the two idle fuel adjusting needles.

Step 3 can only be performed within the

ȱȱ¢ȱȱǯȱȱȱĴȱȱ

remove the limiter caps.

ȱ ŗǯȱ ȱȱȱȱȱȱȱĴȱȱśȱȱŗŖȱ

minutes to warm up. The engine must be warm

ȱȱȱŘǰȱřǰȱȱŚǯ

ȱŘǯȱ ȱȱĴȱȱȱȱȃȄȱȱȃȄȱ

ǯȱȱȱȱȱȱȱŗŘŖŖȱ

ǯȱȱȱȃȱȱȱȱȱ

ǻǼȄȱǯ

3.ȱ ȱȱȱǻǼȱĴǱ Place the

ĴȱȱȱȃȄȱȱȃȄȱǯ

a. Turn one of the low idle fuel adjusting

needles out (counterclockwise) from the

¢ȱĴȱȱȱȱȱ

decreases (rich). Note the position of the

needle. Now turn the adjusting needle in

(clockwise). The engine speed may increase,

then it will decrease as the needle is turned

in (lean). Note the position of the needle. Set

the adjusting needle midway between the

ȱȱȱĴǯȱȱȱśȬŜǯ

b. Repeat the procedure on the other

low idle adjustment needle.

ȱ Śǯȱ ȦȱȱȱȱȱǻǼǰȱȱȱ

ęȱĴǯ

Figure 5-6. Optimum Low Idle Fuel Settings.

Low Idle

Speed

(RPM)

Adjustment

Screw

Low Idle Fuel

Adjustments

(With Limiters)

Bowl

Vent

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