Kohler Command Pro CV980 User Manual download pdf (Page 32)

5.4

Section 5

Fuel System and Governor

Troubleshooting Checklist

When the engine starts hard, runs roughly or stalls

at low idle speed, check the following areas before

adjusting or disassembling the carburetor.

ȱ Ȋȱ ȱȱȱȱȱȱęȱȱǰȱȱ

gasoline.

• Make sure the fuel tank cap vent is not blocked

and that it is operating properly.

• Make sure fuel is reaching the carburetor. This

ȱȱȱȱȬěȱǰȱȱ

ȱęȱǰȱȬȱȱęǰȱȱȱȱ

fuel pump for restrictions or faulty components

as necessary.

• Make sure the air cleaner base and carburetor are

securely fastened to the engine using gaskets in

good condition.

• Make sure the air cleaner element (including

precleaner if equipped) is clean and all air cleaner

components are fastened securely.

• Make sure the ignition system, governor system,

¡ȱ¢ǰȱȱĴȱȱȱȱ

are operating properly. If the engine is hard-

starting, runs roughly, or stalls at low idle speed,

it may be necessary to adjust or service the

carburetor.

Troubleshooting – Carburetor Related Causes

Condition Possible Cause/Probable Remedy

ȱ ŗǯȱ ȱȱǰȱȱ¢ȱ

or stalls at idle speed.

ȱ ŗǯȱ ȱȱȱ¡ȱǻȱǼȦȱ¢ȱ

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

fuel needle.

ȱ Řǯȱ ȱȱȱǻȱ¢ȱ

black, sooty exhaust smoke,

ęǰȱȱȱȱȱǰȱ

governor hunting, or excessive

ĴȱǼǯ

ȱŘǯȱ ȱȱǯȱȱȱǯ

ȱ ǯȱ ȱ¢ȱȱȱǯȱȱȱȱȦ

linkage to ensure choke is operating properly.

ȱ ǯȱ ȱȱȱ¡ȱȱ¢ȱǯȱȱȱȱ

fuel needle (some models).

d. Float level is set too high. Separate carburetor air horn from

ȱ¢ǰȱȱĚȱȱȱȱȱ

procedure.

e. Dirt under the fuel inlet needle. Remove needle; clean needle

and seat and blow with compressed air.

f. Bowl vent or air bleeds plugged. Remove low idle fuel adjusting

needle. Clean vent, ports, and air bleeds. Blow out all passages

with compressed air.

ȱ ǯȱ ¢ǰȱȱȱȱĚǯȱȱĚȱȱȱȱ

leaks.

ȱ řǯȱ ȱȱȱǻȱ¢ȱ

ęǰȱȱȱȱȱǰȱ

governor hunting or excessive

ĴȱǼǯȱ

ȱřǯȱ ȱȱȱ¡ȱȱ¢ȱǯȱȱȱȱ

fuel needle (some models).

b. Float level is set too low. Separate carburetor air horn from

ȱ¢ǰȱȱĚȱȱȱȱȱ

procedure.

c. Idle holes plugged; dirt in fuel delivery channels. Remove low

idle fuel adjusting needle. Clean main fuel jet and all passages;

blow out with compressed air.

4. Fuel leaks from carburetor. ȱŚǯȱ ȱȱȱȱǯȱȱ¢ȱŘǯ

ȱ ǯȱ ȱȱȱȱǯȱȱ¢ȱŘǯ

c. Bowl vents plugged. Blow out with compressed air.

d. Carburetor bowl gasket leaks. Replace gasket.

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Kohler Command Pro CV980 User Manual Page 32

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