Fuel Filter; Fuel System Tests - Kohler Courage SH Series Service Manual

Fuel System
Typical carbureted fuel system and related components
include:
● Fuel tank.
● Fuel lines.
● In-line fuel fi lter.
● Fuel tank fi lter.
● Carburetor.
● Fuel strainer screen in carburetor.
Fuel tank outlet is located above carburetor inlet,
allowing gravity to feed fuel through in-line fi lter and fuel
line to carburetor.
Fuel then enters carburetor through a fuel shut-off valve
and a fi ne screen/sediment bowl, and then to carburetor
fl oat bowl. Fuel is drawn into carburetor body and is
mixed with air. This fuel-air mixture is then burned in
engine combustion chamber.
FUEL RECOMMENDATIONS
Refer to Maintenance.
FUEL LINE
Low permeation fuel line must be installed on carbureted
Kohler Co. engines to maintain EPA and CARB
regulatory compliance.

FUEL FILTER

Fuel Tank Filter
A serviceable fuel tank fi lter is located under fuel tank
cap, in fi ller neck.
Daily or as required clean fi lter of any accumulation as
follows:
1. Remove fuel tank cap and fi lter.
2. Clean fi lter with solvent, replace if damaged.
3. Wipe fi lter and insert it.
4. Tighten fuel tank cap securely.

FUEL SYSTEM TESTS

When engine starts hard or turns over but will not start, fuel system might be causing problems. Test fuel system by
performing following test.
1. Check for fuel in combustion chamber.
a. Disconnect and ground spark plug lead.
b. Close choke on carburetor.
c. Crank engine several times.
d. Remove spark plug and check for fuel at tip.
2. Check for fuel fl ow from tank to carburetor.
a. Remove fuel line from inlet fi tting of carburetor.
Condition
Fuel at tip of spark plug.
No fuel at tip of spark plug.
Fuel fl ows from fuel line.
No fuel fl ow from fuel line.
Fuel fl ows from valve.
No fuel fl ows from valve.
20
Fuel Shut-Off
Explosive Fuel can cause fi res and severe
burns.
Do not fi ll fuel tank while engine is hot or
running.
Gasoline is extremely fl ammable and its vapors can
explode if ignited. Store gasoline only in approved
containers, in well ventilated, unoccupied buildings,
away from sparks or fl ames. Spilled fuel could ignite
if it comes in contact with hot parts or sparks from
ignition. Never use gasoline as a cleaning agent.
Engines are equipped with a fuel shut-off located at
carburetor. It controls fuel fl ow from tank to carburetor.
1. Stop engine.
2. Turn fuel shut-off lever to OFF position.
3. Remove fuel shut-off cup.
4. Clean fuel shut-off cup with solvent and wipe dry.
5. Inspect for worn or damaged O-ring; replace as
necessary.
6. Place O-ring on fuel shut-off cup. Install fuel shut-off
cup and O-ring; rotate until fi nger tight. Turn with a
wrench 1/2 to 3/4 full turn.
7. Turn fuel shut-off lever to ON position and check for
leaks. If fuel shut-off cup leaks, repeat steps 5 and 6.
8. Tighten fuel tank cap securely.
b. Use an approved fuel container to catch fuel, and
hold line below bottom of tank to observe fuel
fl ow.
3. Check operation of fuel shut-off valve.
a. Remove fuel sediment bowl under inlet fi tting of
carburetor.
b. Turn fuel shut-off valve ON and OFF and observe
operation.
Fuel is reaching combustion chamber.
Check fuel fl ow from fuel tank (step 2).
Check operation of fuel shut-off valve (step 3).
Check fuel tank vent, in-line fi lter threaded into tank, and
fuel line. Correct any observed problem and reconnect
line.
Check for dirt and water in sediment bowl and screen.
Clean bowl and screen as needed. Check for faulty
carburetor, refer to Carburetor.
Check for a restriction in fuel shut-off valve or inlet elbow.
KohlerEngines.com
WARNING
Conclusion
18 690 01 Rev. F