Kohler Command Pro CV960 Service Manual page 32

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.
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
fuel pump for restrictions or faulty components
as necessary.
Condition
or stalls at idle speed.
black, sooty exhaust smoke,
governor hunting, or excessive
governor hunting or excessive
4. Fuel leaks from carburetor.
5.4
Troubleshooting – Carburetor Related Causes
fuel needle.
linkage to ensure choke is operating properly.
fuel needle (some models).
d. Float level is set too high. Separate carburetor air horn from
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.
leaks.
fuel needle (some models).
b. Float level is set too low. Separate carburetor air horn from
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.
c. Bowl vents plugged. Blow out with compressed air.
d. Carburetor bowl gasket leaks. Replace gasket.
• 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,
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.
Possible Cause/Probable Remedy