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Kohler CV14S Carburetor
Kohler CV14S carburetor adjustments should be made only after the engine
has warmed up. These engines are equipped with one of two basic types of
fixed main jet carburetors: Walbro or Nikki.
Walbro carburetors have a low idle speed screw and a low idle fuel
adjusting needle. Nikki carburetors only have a low idle speed screw.
Certified carburetors will have fixed idle fuel or a limiter cap on the
idle fuel adjusting needle.
The carburetor is designed to deliver the correct fuel-to-air mixture to
the engine under all operating conditions. The main fuel jet is
calibrated at the factory and is not adjustable. The low idle fuel
adjusting needle is also set at the factory and normally does not need
adjustment.
To ensure correct engine operation at altitudes above 1525 meters (5000
ft.), it may be necessary to 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.
Kohler CV14S Carburetor 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 shut-off 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.
Kohler CV14S Carburetor Adjustment
Engines may have a fixed idle or limiter cap on the idle fuel adjusting
needle. Step 2 can only be performed within the limits allowed by the
cap.
1) Start the engine and run at half throttle for 5 to 10 minutes to warm
up. The engine must be warm before doing steps 2 and 3.
2) Low Idle Fuel Needle Setting (Walbro Carburetor): Place the throttle
into the idle or slow position. Turn the low idle fuel adjusting needle
out (counterclockwise) from the preliminary setting until 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.
3) Low Idle Speed Setting (Walbro and Nikki Carburetor): 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.
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 1200 RPM (± 75
RPM).
When troubles occur, be sure to check the simple causes which, at first,
may seem too obvious to be considered. For example, a starting problem
could be caused by an empty fuel tank. Some common causes of engine
troubles are listed in the following table. Do not attempt to service or
replace major engine components, or any items that require special
timing or adjustment procedures.
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KOHLER ENGINES SPECS AND SERVICE DATA |
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KAWASAKI ENGINES SPECS AND SERVICE DATA |
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BRIGGS AND STRATTON ENGINES SPECIFICATIONS |
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HONDA ENGINES SPECS AND SERVICE DATA |
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