Kohler K582 - Manual (Page 11)

11
Kohler Carburetor Adjustment
1. With the engine stopped, turn the low idle fuel
adjusting needle in (clockwise) until it bottoms
lightly.
NOTE: The tip of the idle fuel and main fuel
adjusting needles are tapered to critical
dimensions. Damage to the needles and
the seats in carburetor body will result if
the needles are forced.
2. Preliminary Settings: Turn the adjusting needles
out (counterclockwise) from lightly bottomed to
the positions shown in the chart.
Carburetor Troubleshooting
and Adjustments
NOTE: Carburetor adjustments should be made only
after the engine has warmed up.
Kohler K582 engines are equipped with Kohler
adjustable main jet carburetors.
The carburetor is designed to deliver the correct
fuel-to-air mixture to the engine under all operating
conditions. The main fuel and idle fuel needles on
adjustable jet carburetors are set at the factory and
normally do not require further adjustment.
Troubleshooting
If engine troubles are experienced that appear to be
fuel system related, check the following areas before
adjusting the carburetor.
• Make sure the fuel tank is filled with clean, fresh
gasoline.
• Make sure the fuel tank cap vent is not blocked
and that it is operating properly.
• If the fuel tank is equipped with a shutoff valve,
make sure it is open.
• If the engine is equipped with an in-line fuel filter,
make sure it is clean and unobstructed. Replace
the filter if necessary.
• Make sure fuel is reaching the carburetor. This
includes checking the fuel lines and fuel pump for
restrictions or faulty components, replace as
necessary.
• Make sure the air cleaner element is clean and all
air cleaner element components are fastened
securely.
If, after checking the items listed above, the engine is
hard to start, runs roughly, or stalls at low idle speed, it
may be necessary to adjust or service the carburetor.
Low Idle Main Fuel
K582 1-1/4 turns 3 turns
3. Start the engine and run at half throttle for 5 to 10
minutes to warm up. The engine must be warm
before making final settings.
4. Main Fuel Needle Setting: Place the throttle into
the "fast" position. If possible, place the engine
under load.
Turn the main fuel adjusting needle out
(counterclockwise) from the preliminary setting
until the engine speed decreases (rich). Note the
position of the needle.
Now turn the adjusting needle in (clockwise). The
engine speed may increase, then it will decrease
as the needle is turned in (lean). Note the position
of the needle.
Set the adjusting needle midway between the
rich and lean settings.
5. Low Idle Speed Setting: Place the throttle
control into the “idle” or “slow” position. Set the
low idle speed to 1200 RPM* (± 75 RPM) by
turning the low idle speed adjusting screw in or
out. Check the speed using a tachometer.
*NOTE: The actual low idle speed depends on
the application – refer to equipment
manufacturer's recommendations. The
recommended low idle speed for basic
engines is 1200 RPM. To ensure best
results when setting the low idle fuel
needle, the low idle speed must not
exceed 1500 RPM.