Pekar carburetors have always been highly reliable, and car owners have virtually no serious problems with them. But in order for the device to show really high efficiency, it is important to correctly adjust it. The motor resource will depend on how well and finely tuned the tuning is. Let's see how the carburetor K-151 is adjusted. The process is simple, but quite responsible.
Why adjustment?
This knowledge is necessary for the engine to function properly.
Correctly adjust the mechanism is necessary so that fuel consumption is at an acceptable level, but at the same time, power and torque do not fall. Incorrectly set jets will contribute to overrun of the mixture, which can be 2-2.5 times more than usual.
Fuel Mixture Formation Options
Specialists distinguish several options for the ratio of fuel to air for motors. The most optimal is the proportion where 15 parts of air fall on one part of gasoline. There is a more effective mixture. Here the proportion is one part of fuel for 12.5-13 parts of air. This mixture is the richest. The car will quickly gain momentum, but the fuel consumption will also be quite high. For those who like to save, there is also a mixture formation option. Here, one part of gasoline accounts for up to 16-16.5 parts of air. The car practically does not lose in dynamics.
Adjusting the K-151
carburetor allows the owner to adjust the unit to the existing need and his own desires, but if the engine is stable and generally suits the owner, the setting can be postponed.
About carburetor maintenance
However, there are cases when you cannot do without tuning. The disadvantage of all carburetors is their ability to clog. Today, at gas stations, you can often pour low-quality fuel into the tank. Yes, someone will say that there is a fuel filter. But often he does not cope with small specks that fall into the K-151 carburetor. The jets are clogged, as a result, the fuel can no longer get into the chambers in full. You cannot use pieces of wire to clean them - only a non-contact spray cleaner.
Also, the need for tuning may arise when some elements of the unit fail. Failed elements are replaced with new ones, but without tuning to optimal operation, you should not count.
Is it possible to ignore?
Adjustment of the Pekar K-151 carburetor will help to avoid increased fuel consumption or vice versa, its insufficient intake in the engine. The consequence of a lack of gasoline in the mixture may be a decrease in engine power.
In addition, if the settings were not performed or are made incorrectly and in this condition the device was used for a long time, motor parts may fail. Engine repair in modern conditions is not an expensive thing. Therefore, it is better to spend a little time and adjust the K-151 carburetor. Adjusting it is a simple procedure. Maintenance is reduced to flushing and purging, and yet all this can be done in a conventional garage using ordinary tools.
How to regulate idling
On the units of the Pekar plant, this operation is very important. If XX is adjusted, then the engine will delight the owner with stable operation. Also in exhaust gases there are almost no harmful emissions. Such a car will not cause significant harm to the environment. If the car has been used for a long enough time, and the fuel and air filters are clogged, then at idle fuel consumption will increase significantly .
Adjusting the K-151 carburetor consists of several simple steps. The first step is to start and warm up the engine. Then on the shank should find a screw that is responsible for the quality of the mixture. A limiter is installed on it, which prevents it from rotating. This limiter must be removed. Next, set up the element responsible for the quality of the mixture. Rotating it, they are looking for a position in which the crankshaft at idle will gain the most speed. Then adjust the screw responsible for the quantity. The rotation speed of the crankshaft is increased by another 100-200 rpm. When the element responsible for quality is twisted, the crankshaft rotates at lower speeds. It remains only to set the optimal frequency. With this setting, the machine has maximum dynamics and fuel economy.
Everything is done correctly if, at the time of tightening the quality adjustment screw, the revolutions begin to decrease. This is a sign of impoverishment of the combustible mixture. If there is no drop in speed, most likely the unit is defective or clogged. In the latter case, it can be "reanimated" with a carburetor cleaner. But without parsing the mechanism, this is impossible.
How to adjust the fuel level in the float chamber?
The amount of fuel that the engine will consume depends on the correctness of this setting. If the level is set incorrectly, there will be an increased fuel consumption. There is also an option when the carburetor delivers a mixture without gas to the combustion chambers - only one air. An incorrect level can lead to significant fuel costs or serious engine repairs. Not only the unit from Pekar is sensitive to this level, but also most of the other analogues, regardless of the manufacturer. The carburetor K-151 will be adjusted with the help of devices - you need a ruler and a drill with a diameter of 2 millimeters. The first step is to find the most level place - it’s much more comfortable to work. Then it is necessary to dismantle the air filter. After that, they start the engine and leave it like that for five minutes. Next, the lid is removed from the carburetor and the ruler measures the fuel level. Measurements should be carried out as quickly as possible. When the camera is open, gasoline evaporates from it - the engine and power system are warmed up, and this accelerates evaporation even more.
For the K-151 model, the normal level is 2.15 centimeters. That is how the manufacturer guarantees the good operation of the device. If the level is above or below the norm, you need to adjust it. Adjustment is a change in the position of the float.
K-151 carburetor: float adjustment
To correctly adjust the fuel level, it is recommended to find in advance some kind of device that could help when taking measurements. Any item with a diameter of up to two millimeters will do. Then you should turn the unit over and put it on the most level place - this will increase the chances of making measurements correctly. Next, look at the gap from the bottom of the float to the gasket from cardboard. The normal distance on the working carburetor is no more than two millimeters. If the fuel level in the float chamber is incorrect, the tongues are folded. Further, all measurements are carried out again - each time you need to check whether everything is correct. The most common float devices today (such as the K-151 carburetor). The device, the adjustment of the units are as simple as possible, and the design allows you to get stable characteristics of the mixture of fuel and air.
Measuring positions with a caliper
A depth gauge will be used. Measure from the top of the float to the cardboard pad. The normal result, in which you do not need to configure anything else, is 3 centimeters.
Is everything done right?
Adjustment of the carburetor "Gazelle" K-151 may not be performed correctly due to the fault of the owner. You need to know exactly if everything is configured. For testing, the unit cover is stacked vertically. Then carefully examine the tongue on the lever. If the adjustment is made correctly, it will slightly recess the ball-damper of the needle valve. Also, the tongue is located almost parallel to the needle valve. The axis of the punching of the float should be equal to the surface of the cover.
Trigger Setup
The starting system is considered one of the most important. She reports on the start of the motor. If the elements of the system do not work correctly, this threatens a serious repair. It often happens that, with full serviceability of all components, the starting system does not act as laid down by the manufacturer. Adjustment of the carburetor K-151 (including UAZ) should be carried out only on a completely removed unit.
The first step is to open the throttle and find the trigger control lever. It is turned all the way and fixed. Then, when the throttle is released, measure the clearance between the edge of the shutter and the camera. It should be approximately 1.5 mm. Next, unscrew the lock nut. It will help to work with the emphasis in the form of a screw on the throttle lever. The screw is rotated half a turn each time. As a result, the element will be perpendicular to the cam. Then measure the length of the rod and, if necessary, adjust it. This is the thrust with which the trigger cam is connected to the levers on the axis of the air damper. When the latter is closed, and the lever at this moment is turned all the way, the gap should be no more than 0.2-0.8 mm. If not, unscrew the thrust head. To reduce the clearance, the head is tightened, reducing the length of the rod.
Finally
A carburetor is an important device in a car. It provides the engine with fuel. For everyone who has a K-151C carburetor installed, the adjustment will now not be difficult. After setting up, it is imperative to run-in to identify and correct deficiencies.