Kohler Courage SV710-740 Service Manual page 39

Operating the engine with the wrong engine
configuration at a given altitude may increase
its emissions and decrease fuel efficiency and
performance. To ensure correct engine operation
at altitudes above 1219 meters (4000 ft), it may be
necessary to have an authorized Kohler dealer install
a special high altitude jet kit in the carburetor. If a
high altitude kit has been installed, the engine must
be reconverted to the original jet size, before it is
operated at lower altitudes, or overheating and engine
damage can result.
To obtain high altitude kit information or locate a
dealer near you, call 1-800-544-2444 to find the names
of the nearest Kohler Co. Service Centers or, access
our web site at: www.kohlerengines.com and click on
the "Service & Dealer Locator" located in the upper
right hand corner. The service center will need your
engine specification number which is found on your
Engine ID Label.
Most carburetors are equipped with a fuel shut-off
solenoid. See Figure 5-4. The solenoid is installed in
place of the bowl retaining screw. The solenoid has a
spring-loaded pin that retracts when 12 volt current is
applied to the lead. When it is extended, the main fuel
jet is blocked, preventing normal carburetor operation.
Below is a simple test, made with the engine off, that
can determine if the solenoid is functioning properly:
1. Shut off the fuel and remove the solenoid from
the carburetor. When the solenoid is loosened
and removed, gas will leak out of the carburetor.
Have a container ready to catch the fuel.
2. Wipe the tip of the solenoid with a shop towel or
blow it off with compressed air, to remove any
remaining fuel. Take the solenoid to a location
with good ventilation and no fuel vapors present.
A 12 volt power source that can be switched off
and on, is also needed.
3. Be sure the power source is switched off. Connect
the positive power source lead to the red lead of
the solenoid. Connect the negative power source
lead to the solenoid body.
4. Turn the power source on, and observe the pin in
the center of the solenoid. The pin should retract
with the power on, and return to its original
position with the power off. Test several times to
verify operation.
The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine under all operating
conditions. The high speed mixture is preset at the
factory and cannot be adjusted. The low idle fuel
adjusting screw (some models) is also set at the
factory and normally does not need adjustment. See
Figure 5-5. Engines in this series depending on the
model and application, may also be equipped with a
Governed Idle System.
If the engine is equipped with a Governed Idle
System, refer to Models with Governed Idle System
when performing any carburetor adjustment, as an
additional step to the listed procedure(s) is required.
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
NOTE: Some carburetors may have a fixed idle
or limiter cap on the idle fuel adjusting
needle. Do not attempt steps 1 and 2 below.
Proceed directly to step 3. Step 5 can only be
performed within the limits allowed by the
cap.
To adjust the carburetor idle fuel and speed, see
Figure 5-5, and follow these steps.
1. With the engine stopped, turn the low idle fuel
adjusting screw in (clockwise) until it bottoms
lightly. Access this screw through the air cleaner
base. See Figures 5-5 and 5-6.