As a result of operation of the vehicle is a natural process of clogging the carburetor. Depending on many factors, the process of fouling can be accelerated or slowed down. The rate of contamination is highly dependent on the technical condition of motor vehicle operating conditions and the quality of gasoline. Motors with worn cylinder-piston group (CPG) is much faster and cover the surface of the carb jets to air film of oil and tar deposits. Clogging of the upper part of the carburetor is a tube ventilation of crankcase gases. In good condition CPG clogging the carburetor is much slower. Water and various types of garbage can get into the carburetor float chamber due to the use of dirty fuel. Because of poor air filtration debris can get into the carburetor through the vents the float chamber. Sometimes there is damage the inner surface of the fuel nozzle and small pieces of rubber clog the fuel filter at the inlet to the carburetor. Repair of the carburetor may be partial or complete. When the carburetor is easy to adjust, it has no significant surface contamination and the removal of faults not difficult, then it is possible to conduct a partial (preventive) maintenance. Cleaning the nozzles and retracting debris from the float chamber, adjust the idle speed or fuel level in the float chamber will not take much time and does not require complete disassembly and removal of the carburetor. Complete repair is performed when the appearance of the carb says that he has long been out of service when the correct adjustment can not be idle or identified other serious problem. After removing the carburetor should be reliably block the hole in the intake manifold to prevent the motor of foreign objects. The final inspection of parts and verification of the carburetor device should be made only after a thorough general cleaning, washing and flushing of internal channels. Before disassembling the carburetor is recommended that you remove the outer parts, which will prevent disconnection covers and carburetor body, and only then, being careful not to break the seal, loosen the screws and remove the top cover. Screws and other small parts should be put into a clean roomy box with low margins. During disassembly of the carburetor, carefully notice all the faults that you can find. This will give you the opportunity to learn in practice how often a variety of faults and the effect can be expected after elimination of these problems. When disassembling the carburetor pay attention to the operation of the pump the accelerator to the correct installation of fuel and air jets, check the composition and amount of debris in the float chamber, fuel gauge and needle valve leaks and the condition of the rubber diaphragms. Finding some of the water at the bottom of the float chamber, it is necessary to establish exactly how she could get there. To do this, shake the bottle of gasoline into a clean swap with a hand and make sure that the fuel nozzles is no water. If water is detected - to connect the pipe to clean the carburetor fuel supply is possible only after complete flushing the entire fuel system. Otherwise, after a short time will have to re-repair the carburetor. A quick rinse fuel system can be organized as follows: after the installation of the engine clean, repaired the carburetor must be connected to it a separate instrumentation tank with clean gasoline. The tank can be hung to open the hood the car. For this purpose you can use plastic expansion tank capacity of 2 liters of cooling systems in cars, "Lada". Then you need to lengthen the pipe supplying fuel to the carburetor of fuel pump and bring it into the empty canister. If the fuel system of the vehicle has an inverse drain gasoline, it is necessary to take measures to close the circulation of gasoline in the tank instrumentation. All this is done in order to start the engine and avoid contact with dirty gasoline in the carburetor clean. At the time of the motor fuel to be pumped dirty from the tank car in the empty canister and the carburetor will run on pure gasoline from a portable tank. Rinsing should continue until the tank of pure gasoline. After washing, should be replaced by a fine filter fuel. Water can get into the float chamber through openings in the top of the carburetor air filter housing. In cold weather, the mixing of hot and cold crankcase air to the air filter housing may be formed of water droplets, which are then sucked into the carburetor. Particular attention in the disassembly of the carburetor should be paid to the state of the throttle. At the two-chamber carburetor frequent jamming or clogging of a large deposit throttle the second chamber. This problem leads to a drop in engine power. If the flap of the second camera can not be tightly closed - this entails a significant increase in consumption of gasoline. During the repairs needed to do everything possible to ensure ease of rotation flaps, and the density of closure. Not all carbs is adjustable level of fuel in the float chamber. For example, carburetors "Pirburg" have a plastic float that can not bend the needle valve and a jack, which is pressed into the housing top cover. Sometimes there is a partial loss of the needle valve. This leads to a decrease in the level of fuel. Therefore, to increase the level necessary to remove the float and light hammer blows to return to the nest site, checking after each impact, position the float. Casting seam on the float should be parallel to the cut of the cover in a vertical arrangement of the cover.
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