5.2
Section 5
Fuel System and Governor
Carburetor
General
The CS engines use fixed jet MIKUNI carburetors. The
fixed main jet carburetor is designed to deliver the
correct fuel-to-air mixture to the engine under all
operating conditions. The high idle mixture is set at the
factory and cannot be adjusted. The low fuel adjusting
needle is also set at the factory and normally does not
need adjustment.
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
Fuel System Tests
When the engine starts hard, or turns over but will not start, it is possible that the problem is in the fuel system. To
find out if the fuel system is causing the problem, perform the following tests.
1. Check the following:
a. Make sure the fuel tank contains clean, fresh,
proper fuel.
b. Make sure the vent in the fuel cap is open.
c. Make sure the fuel valve is open.
2. Check for fuel in the combustion chamber.
a. Disconnect and ground the spark plug lead.
b. Close the choke on the carburetor.
c. Crank the engine several times.
d. Remove the spark plug and check for fuel at
the tip.
3. Check for fuel flow from the tank to the
carburetor.
a. Remove the fuel line from the inlet fitting of the
carburetor.
b. Hold the line below the bottom of the tank.
Open the shut-off valve and observe flow.
Conclusion
Test
2. If there is fuel at the tip of the spark plug, fuel is
reaching the combustion chamber.
If there is no fuel at the tip of the spark plug,
check for fuel flow from the fuel tank. (Test 3)
3. If fuel does flow from the line, check for a
problem in the carburetor (dirt, gum, varnish, etc.)
If fuel does not flow from the line, check for a
clogged fuel cap vent, inlet filter, shut-off valve
screen filter, and/or fuel line(s).
Troubleshooting – Fuel System Related Causes
Содержание COMMAND PRO CS10
Страница 1: ...SERVICE MANUAL COMMAND PRO CS SERIES 4 12 HP HORIZONTAL CRANKSHAFT...
Страница 20: ...1 18 Section 1 Safety and General Information...
Страница 24: ...2 4 Section 2 Special Tools...
Страница 48: ...6 4 Section 6 Lubrication System...
Страница 54: ...7 6 Section 7 Retractable Starter...
Страница 84: ...8 30 Section 8 Electrical System and Components...
Страница 106: ...9 22 Section 9 Disassembly...
Страница 122: ...10 16 Section 10 Internal Components...
Страница 154: ...ENGINE DIVISION KOHLER CO KOHLER WISCONSIN 53044 LITHO IN U S A FORMNO TP 2503 A ISSUED 12 99 REVISED 8 00 MAILED 9 00...