The era of carburetor technology has long been a thing of the past. Today, fuel enters the car’s engine electronically. However, cars that have carburetors in their fuel system still remain. In addition to retro cars, there are still quite working “horses” - UAZs, as well as a classic from the Togliatti Automobile Plant. And that means that the ability to understand the device, carry out maintenance, and repair the carburetor remains at a price.
This article will focus on the K126G carburetor. Adjustment of the K126G carburetor is a delicate event that requires certain skills and good knowledge of its composition and principles of work. But first, let's recall a little about what a carburetor is.
About carburetor systems
So what is a carburetor? Translated from French carburation - "mixing". From here it becomes clear the purpose of the device - to create a mixture of air and fuel. After all, it is the fuel-air mixture that ignites from the spark of a car spark. Due to the simplicity of design, carburetors today are used on low-power engines of lawn mowers and chainsaws.
There are several varieties of carburetors, but everywhere the main components will be a float chamber and one or more mixing ones. The principle of the float chamber is similar to the valve mechanism of the toilet bowl. That is, the liquid enters to a certain level, after which the locking device is activated (this is a needle in the carburetor). Fuel enters the mixing chamber through the atomizer along with air.
The carburetor is a pretty thin device to configure. Adjustment of the K126G carburetor should be carried out with every maintenance and any problem. A properly configured fuel-air mixture supply unit ensures uniform engine operation.
The carburetor device K126G
The K126G carburetor is a typical representative of a two-chamber version. That is, K126G has a float and two mixing chambers. And if the first one works constantly, then the second one starts to work only in dynamic modes with sufficient load.
The K126G carburetor, the device whose adjustment and repair are described in this article, is quite popular for UAZ vehicles. The device is very unpretentious in operation and is resistant to debris.
In the float chamber K126G there is an inspection window by which you can determine the fuel level. The carburetor incorporates several subsystems:
- idle move;
- starting a cold engine;
- accelerator pump;
- economizer.
The first three work only in the primary chamber, and a separate atomizer is provided for the economizer system, which is discharged into the air channel of the second carburetor chamber. General control of the device is carried out using the "suction" system and the accelerator pedal.
Applicability K126G
A carburetor marked "K126G" was installed and is still serviced on the Gaz-24 Volga and UAZ vehicles, with engines primarily UMZ-417. UAZ car owners in particular love this model for its unpretentiousness and ability to work even with clogged fuel.
With minor refinement (hole drilling), K126G is installed on UMZ-421 engines. And it can be both UAZ and Gazelle. The predecessor of K126G can be considered K151, and the next model - K126GM.
Carburetor adjustment K126G is the most popular issue among carburetors. But first, consider the various problems that can happen with K126G.
Possible malfunctions
All malfunctions of the described system are either visible visually, or they are easy to check. One of the main problems is the unstable engine idling, or there are none at all. The K126G carburetor, whose fuel consumption adjustment is normal, without any problems, allows the engine to idle.
The second point, which shows that the device is malfunctioning and requires adjustment, is to increase fuel consumption. There may be several reasons, so adjusting and adjusting the carburetor does not always help.
A scheduled regular cleaning of all constituent elements can solve the problem. Incomplete cleaning is also possible with a carburetor not removed from the car, but it is undesirable. K126G, like any mechanical device, prefers good care.
Carburetor adjustment K126G
The need to adjust the carburetor can arise for various reasons. This can be scheduled maintenance or troubleshooting. Moreover, a simple adjustment according to the instructions is quite simple. The downside is that it does not always help in the decision. Experienced mechanics with extensive experience in carburetor repair do not take up the job without adjusting the valves.
In order for the fuel-air mixture mixing device to function without interruptions and not to be constantly regulated, timely maintenance is necessary. It is enough to perform an elementary inspection for leakage and tightness and rinse the carburetor at least partially. Sometimes it is necessary to check the fuel level in the float chamber, as well as the throughput of both fuel and air jets.
If you approach the issue systematically, then it is necessary to highlight the following types of carburetor settings:
- idle move;
- fuel level in the chamber with a float;
- economizer valve.
Adjusting the K126G carburetor on an UAZ most often involves setting up idle specifically. So, consider the sequence of actions to return auto stability at idle.
Instructions for adjusting idle speed K126G
The stability of the engine is controlled by two screws. One determines the amount of fuel-air mixture, and the second - the quality of its enrichment at K126G. The carburetor adjustment, the instruction of which is given below, is carried out in stages:
- On a muffled vehicle, tighten the mixture enrichment screw as far as it will go, and then unscrew it by 2.5 turns.
- Start the car engine and warm it up.
- The first screw to achieve accurate and stable engine operation at about 600 rpm.
- The second screw (enrichment of the mixture) gradually impoverish its composition so that the engine continues to work stably.
- The first screw increases the number of revolutions by 100, and the second decreases them by the same amount.
The correctness of the adjustment is checked by increasing the speed to 1500 and then closing the throttle. The speed should not fall below the permissible values.
Fuel level adjustment in the float chamber
Over time, it may happen that the level of gasoline in the chamber with the float changes. Normally, it should fluctuate within 18-20 mm from the bottom surface of the connector, which is determined through the viewing window of the carburetor. If visually this is not so, then it is necessary to make an adjustment.
Changing the fuel level in the chamber K126G is carried out by bending the tab of the lever of the float. This is done very carefully, being careful not to damage the sealing washer from special gasoline-resistant rubber.
Variety of manufacturers
Among the manufacturers of carburetor K126G there were:
Today, it was Pekar that won the most popularity. Users note in the reviews more stable operation, as well as high dynamic qualities with economical fuel consumption in the region of 10 liters per 100 km. It is worth noting that the adjustment of the Pecar K126G carburetor is carried out in a similar way to the above.
Advantages and disadvantages of K126G
The K126G carburetor is quite popular with UAZ owners. It is appreciated for a number of advantages that are absent in more modern models:
- steady work in the presence of blockage;
- unpretentiousness to fuel quality;
- sufficient economy.
The K126G carburetor, the mixture quality adjustment of which is carried out regularly, will work without any problems. Simplicity of design is a guarantee of reliability. In this case, this will be consistent, but subject to planned maintenance.
K126G has one unpleasant drawback. In case of overheating, the device case may undergo deformation. This occurs when the threaded connections of the carburetor are tightened with excessive force.
Conclusion
Experience shows that adjusting the K126G carburetor is not such a difficult question. And timely maintenance of the device will significantly extend its life. All this together with the unpretentiousness of K126G attracts owners of carburetor cars.