How and with what to flush a carburetor at home, what product to use

The carburetor fuel system is most often found on older foreign-made cars, as well as on domestic cars that run on gasoline. Situations often arise when interruptions in engine operation appear in the form of jerks and failures. In addition, in some cases the engine may not start and may operate intermittently at idle speed. At the same time, fuel consumption increases.

In most cases, such problems are associated with contamination of the carburetor. This device needs to be cleaned periodically. Such a timely procedure ensures safety and uninterrupted operation of the power unit. Every driver should know how to clean it in the field without removing it from the car.

Car carburetor design

For normal operation, the engine must receive a fuel-air mixture.
The regulation and supply of the mixture is entrusted to the carburetor, which controls mixing in strict proportions. That is, a carburetor is a device that creates a ready-made mixture of gasoline and air. He supplies it in certain doses to the engine. The node consists of the following elements:

• two chambers separated by a partition;
• jets and channels;
• float with axle;
• needle valve;
• throttle valve;
• Venturi tubes.

This carburetor is called a float carburetor. The principle of its operation is simple: a special line is connected to one of the chambers, through which gasoline is supplied directly from the tank. The next portion of fuel gets inside only after the float with the shut-off valve drops. When the chamber is full, the needle shuts off the fuel supply.

The main jet acts as a calibrator. Through it, gasoline enters the atomizer, then into the mixing chamber. Here the process of mixing fuel with air entering through the throttle valve occurs.

A carburetor is a complex device capable of recognizing several operating modes of an internal combustion engine:

• maximum loads;
• idling;
• average speed;
• cold work.

It should react differently to each mode. In one case, enrich gasoline with oxygen, in the other, minimize the supply of fuel. Therefore, every part of such a complex device must be in good working order and clearly calibrated.

Carburetor cleaning products

What engine oil to use in a car
Who is too lazy to read: here is a good video review of carburetor flushes

I will also be happy to hear your feedback on the article and possibly correct any inaccuracies in the description of the carburetor cleaning process, and in general, I’m interested in any of your opinions!

Preparatory activities

Before starting work, you should take care of the materials and tools used:

1. diagram (it is advisable to have it on hand in order to correctly assemble all the parts into place).
2. Specialized cleaner (specialized stores offer a wide selection of chemicals).
3. A set of screwdrivers and wrenches (tools will be needed for dismantling and complete disassembly).
4. A compressor or canister with compressed air and a special nozzle (in some areas the compressor will not be able to blow well, and the canister has a limited service life).
5. A rubber bulb with a thin spout (you can use it to regulate the blowing force).
6. Clean rags (lint-free cotton fabric is used, woolen rags are not used in any case).
7. Personal protective equipment (when working with chemicals and when blowing with compressed air, you will need safety glasses and gloves).

Carburetor cleaning spray

Various chemical reagents are offered for use on the shelves of car dealerships. Each carburetor cleaner has its own advantages and disadvantages. The most common among users are LIQUI MOLY, Gunk Carb Medic, Run Way, ABRO CC-200.

You need to know that you cannot use WD-40 as a carburetor cleaning liquid, since it contains oil that is undesirable for this process.

The cost of special products for cleaning up the carburetor can range from, for example, $6 for a 350 ml can of Liqui Moly MTX Vergaser Reiniger to $18 for a spray with a capacity of 0.75 liters of IPONE Spray Carbu Cleaner.

If the level of contamination is not severe, it may be sufficient to use gasoline for cleaning. But it will be problematic to wipe off heavily ingrained soot.

Why and when do you need to clean the carburetor?

How to check injectors at home

Like any metering system, carburetor injection is located under the hood of the car, thereby constantly interacting with fuel and hot air. Since it is a mechanical device with some moving parts located outside, it is prone to getting dirty. This could be dust, soot, dirt or motor oil that settles both outside and inside the device.

Carburetor cleaner is needed for preventative cleaning, as well as in the presence of the following car symptoms:

• increased fuel consumption and reduced power;
• it is impossible to start a cold or hot engine;
• high level of emissions of harmful substances and smoke;
• nothing happens when I press the accelerator pedal.

These car symptoms can be caused by other reasons, but the most common are factors associated with a dirty carburetor.

Instructions for use of aerosol cleaner

A special substance is placed in a metal can weighing 400 g. The cleaning aerosol is under pressure. The kit includes a dispenser and a nozzle in the form of a tube for penetration into hard-to-reach places.

When spraying the spray on the surface of all carburetor parts, fire safety precautions must be observed. The product should not be used in rooms with poor ventilation or near open fire. When carrying out work, it is necessary to protect your eyes and hands and avoid contact of caustic substances with mucous membranes or skin.

Why and when you need to clean the carburetor

What kind of oil to fill in a VAZ 2107 carburetor

Let's start with the fact that carburetor injection, like any other metering system in the general power supply circuit of an internal combustion engine, is located in the engine compartment and constantly interacts with the components of the fuel mixture (fuel and air). Also, a carburetor is a mechanical device that consists of a number of moving parts. Some elements are open and subject to significant contamination along with the general contamination of the engine compartment.

During the operation of the car, dust and dirt settle on the carburetor, which mixes with particles of engine oil; the temperature difference in the engine compartment (heating from the internal combustion engine and subsequent cooling) also has its effect. In other words, the carburetor becomes intensively contaminated both outside and inside. Films of gasoline and motor oil settle on carburetor flaps, on the surfaces of drives, in channels and other elements, dust and soot accumulate, and deposits form.

If the pollution is strong, then the following symptoms occur:

• power decreases and fuel consumption increases noticeably;
• smoke, increased toxicity of exhaust gases;
• difficulty starting a cold and/or hot engine;
• unstable operation at idle, the speed fluctuates, the engine troits;
• failures during acceleration, slow response to the gas pedal, etc.

Please note that these symptoms may also occur for other reasons. To eliminate possible problems, the motor requires diagnostics. In parallel with this, on carburetor cars, the metering device is still a common culprit. If this is the case, then you need to clean the carburetor, that is, you will need to use special equipment. To effectively remove contaminants, you must use a high-quality cleaner. In such a situation, you can either deliver the car to a service station or clean the carburetor yourself, deciding on the choice of cleaning agent.

Cleaning procedure without dismantling the carb

Here's how it's done.

1. The VF housing is removed, the EM valve and the plug responsible for the XX mode are unscrewed.
2. After the internal elements of the carb become visible, it is necessary to apply a stream of aerosol agent to flush all lines of the XX system and the first chamber.
3. At the same time, spray the aerosol spray into the second chamber and also treat the air jet channels of the main dosing system.

It is important to understand that correct application of the spray also involves treating camera mirrors and diffusers. Cleaning the valves is mandatory

A thin tube is specially provided for this purpose, allowing you to clean the most difficult places.

It is equally important to process the damper drive lever, as well as other components and simple places of the control mechanisms. This will ensure better controllability and normalize the functioning of the carb.

Cleaning does not end with the spray application stage.

1. You need to wait five minutes. During this time, the product will soften the deposits and wash away the dirt.
2. Next, you need to start the engine, and then pull out the choke, which will allow the engine to operate at idle speed without an EV valve. It is recommended to gas it a little more for a better effect.

By the way, some drivers do this. The speed of the power plant is forcibly increased in the idle mode, then an additional aerosol is sprayed inside the mixing device. In their opinion, this significantly improves the cleanliness of the carburetor.

The procedure can be repeated two or three times. At the final stage, everything must be put back together, the EM and other elements that had to be dismantled must be put back in place. Also, don’t forget to push the choke back into place.

Interesting point. It is recommended to tighten the valve while the engine is running. This must be done extremely carefully, first carrying out the process with your hands, and at the final stage, apply the force of an open-end wrench. You should turn the EM key no more than a quarter turn, as otherwise you can overdo it. In a word, you need to make sure that after removing the wiring from the EV, the engine begins to stall.

There is another cleaning method. It is much shorter than the above method. Often used by experienced motorists.

1. Swap the two armored wires from the spark plugs. Replace the current cable of the first cylinder of the power plant in place of the cable of the fourth cylinder, and vice versa.
2. Start the engine. It will begin to “sneeze” and “shoot”, but this will allow all impurities to be knocked out of the clogged carburetor channels.

During the process of starting an internal combustion engine with armored wires thrown in places, the consistency of ignition is disrupted. The pressure is created from the untimely ignition of fuel assemblies in the combustion chambers. In this manner, you can clean the SWR (carburetor) easily and simply, but you should not leave the engine running in this mode for a long time. In addition, this method is recommended as an emergency, and it is best to carry it out only if you need to drive a car to a service center.

On a note. One way or another, after such a shake-up of the system, the carburetor will still need to be cleaned, because debris from the jets will fall back into the chamber. If this is not done, the channels will become clogged with debris again after some time.

However, it is not always possible to clean the carburetor without removing it. Some models become so dirty during operation that debris accumulates and gets compacted in the float chamber, channels and other areas of the carburetor. It is especially unpleasant when the air supply nozzles become clogged, and the car’s fuel consumption increases significantly.

A carburetor is considered a complex device. Its details are selected with jeweler's precision, there are many of them. To remove all contaminants, washing alone will clearly not be enough. Therefore, carburetor manufacturers use more effective methods. For example, the jets are blown with compressed air, and before that they are soaked in a special liquid.

• Absolutely legal (Article 12.2.4).
• Hides from photo and video recording.
• Installs independently in 2 minutes.
• Invisible to the human eye, does not deteriorate due to weather.
• 2 year warranty

Some recommendations for choosing a carburetor cleaning composition

Each company that produces auto chemicals for cleaning the fuel system strives to ensure that its products are of the highest quality possible and have special characteristics that favorably distinguish the product of this company from similar products of competitors. This gives rise to a dual situation: on the one hand, there is a huge selection of cleaning auto chemicals, and on the other hand, it is very difficult to choose the most suitable composition among the available abundance. Another element of ambiguity is the fact that experts cannot give any clear recommendations on the use of any product.

They suggest being guided by reviews of the products of a particular company, fame and positive reputation of the manufacturer. A good hint for car owners can be a test of a specific cleaning composition, performed by specialists and published on specialized websites or in print publications dedicated to automotive topics.

In addition, experts in the field advise giving preference to cleaners that are not too aggressive on catalytic converters, oxygen flow sensors, and turbochargers.

Carburetor cleaner. Filling the tank

Thanks to the new improved formula of the liquid additive, it is possible to eliminate the consequences for the engine when using average quality fuel. The additive significantly improves the quality of gasoline, effectively cleans the engine, preventing further contamination.

Purpose and compatibility

The product is intended for cleaning fuel systems of carburetor engines. Compatible with any types of domestic fuel. Safe for domestic cars.

Action

The effect provided by the product is complex. So, first of all, this is high-quality removal of carbon deposits, including from hard-to-reach places, and carburetor flushing. It also significantly reduces the risk of consequences of using low-quality fuel.

Application

The drug is added to the fuel tank before refueling. Then the car is refueled as usual, fully. You need to ride it before the reserve. To ensure constant cleanliness and protection of the carburetor, you need to use this additive every 3,000 kilometers or even more often if the gasoline is not of very high quality.

Release form and articles

Carburetor cleaner CARB CLEANER

1. HG3190 / 150 ml.

Expert advice

An excellent addition to this product would be one of the High Gear aerosol cleaners. It will allow you to clean hard-to-reach places - the throttle valve, diffuser, external parts of the carburetor and other parts.

HG3208

Why do this

The serviceability of this element of the fuel system significantly affects the quality of engine operation. Significant pollution causes excessive fuel consumption, negatively affects the dynamic properties of the car and has a negative impact on the environment. A regular cleaning procedure can almost completely restore its functionality. After all, even small specks that get into the jets can create significant problems.

Indirect signs will help identify the need for cleaning without disassembly. These include a clear decrease in dynamics and interruptions in fuel supply. You also need to pay attention to the spark plugs. If they are covered with a large layer of black soot or soot, as well as if they are clearly white, then you should think about how to clean the carburetor. The normal color for candles is a slight brownish tint.

Using a compressed air cylinder

The best carburetor cleaners

1. Vergaser-Aussen-Reiniger from Liqui Moly. The best carburetor cleaner for combating medium and severe contamination comes in 0.4 liter cans. Helps remove non-ferrous metal oxides, carbon deposits, etc. The kit comes with a long spray tube.
2. Carb Reiniger Spray from Ravenol. Carburetor spray that effectively removes carbon deposits, resins, varnish deposits, etc. Suitable for cleaning carburetor exhaust valves and passages, throttle valves, jets, etc.
3. PN08796 from 3M. Carburetor and throttle body cleaner. It is also suitable for removing contaminants from the intake tract temperature sensor and from the forced crankcase ventilation system. Copes well with soot.

Which cleaner is better to choose?

There are many options for cleaners on the market at affordable prices from different manufacturers. When choosing, you should carefully study the instructions to find out the exact composition of the product. The active components that the cleaner contains dissolve deposits. Special impurities help fight carbon deposits and corrosion. The more chemicals in the product, the more effectively the unit is cleaned.

When choosing, you should study the manufacturer’s reputation and look at reviews of each product. Information about quality products can be obtained from experienced motorist acquaintances.

How to clean

Do-it-yourself carburetor cleaning can be done using several methods:

• without dismantling the motor;
• partially disassembling;
• taking it apart completely.

The second method is the most popular among car enthusiasts. What is he?

First you need to purchase special aerosols. A 200 ml can is enough for one use.

In addition to this, you need to prepare:

• several wrenches of different sizes;
• screwdrivers;
• pliers;
• kerosene, acetone or gasoline;
• inflater;
• several toothpicks;
• toothbrush;
• a piece of rough fabric;
• wooden stick.

When cleaning the carburetor, do not forget about soaking. You need to take two containers, a larger one and a smaller one. The lid will be soaked in one, and small elements in the other.

The next steps look something like this:

With the hood open, remove the air filter cover. To do this, unscrew the nut and remove the latches. Pull out the filter element, making sure that the nuts do not fall into the carburetor. Remove the filter and rubber seal. Disconnect the hoses (fuel and ventilation). Separate the wire end from the solenoid valve. Unscrew the screws that secure the cover to the body. There should be 5 of them. Separate the cap from the carb

At this stage it is very important not to damage the integrity of the gasket. Carefully disconnect the solenoid valve, idle jet, filter plug and fitting

It is also necessary to remove the jets (air and fuel), emulsion tubes, atomizer and diffusers. Fill all parts with cleaning emulsion or acetone/kerosene. Also fill the carburetor cap with some cleaning liquid, but into a larger container. Wait about an hour. Using a cleaning product, wash the interior surfaces. Next, clean the outside of the carburetor. After applying the detergent, wait about 30 minutes. Use a toothbrush to clean the cover of the device. This must be done first from the inside and then from the outside. If there are heavy stains, remove them using sticks. The cleaned parts now need to be blown out. Clean the channels with toothpicks. Now the cleaned parts need to dry. If you don't have time to wait, you can wipe them with a clean cloth. Assemble the system without installing the air filter. With the engine running, spray some cleaning aerosol into the carburetor. Give gas. Repeat the procedure for a couple of minutes. Stop the motor and install the filter.

Do not add acetone inside the carburetor. It will, of course, clean up dirt, but it will also damage rubber and plastic parts.

So, cleaning the carburetor yourself is not that difficult. It is enough to prepare all the necessary equipment and materials, and follow simple instructions.

https://youtube.com/watch?v=92kDxIwV210

How to clean a carburetor

The main enemy of the carburetor is dirty fuel.
Due to low-quality fuel, malfunctions in its operation are possible. Spark plugs can indicate failures in the concentration of the mixture. The gray-brown color of the candles indicates the correct proportion of the mixture. Black, sooty spark plugs indicate that the mixture is dominated by fuel, while white or light gray spark plugs indicate an excess of air in the mixture. Carburetor cleaning materials

Instructions. It is needed to remove, disassemble, reassemble and reinstall the carburetor.

Clean, smooth rags (not terry).

Carburetor cleaner (preferably in a spray can).

A can of compressed air.

Sticks or toothpicks.

Wrenches and screwdrivers.

There is a large selection of carburetor cleaners. Go to an auto store and select a cleaner specifically for carburetors. If you are offered another, non-specialized cleaner, refuse it; it may not cope with the dirt in the carburetor. And remember, under no circumstances use WD-40 to clean the carburetor, because... it contains oil. Use a special carburetor cleaner in an aerosol can.

If you thought that it was enough to spray the spray into the carburetor and everything was ready, then we hasten to disappoint you - it will not help. A heavily contaminated carburetor will have to be removed, disassembled and all its components cleaned.

To remove and disassemble the carburetor, follow your vehicle's repair instructions. Be careful not to lose springs, screws, or other small parts. When disassembling the carburetor, clean every part. All rubber and plastic parts should be insulated from the cleaner, as it can deform them.

After you have disassembled the carburetor, collect the metal parts in a metal box or glass jar and fill them with cleaner and let them stand, stirring occasionally. Then, under running water, clean the parts with an old toothbrush or toothpicks.

Do not try to pick at the carburetor outlets or valves. These holes supply fuel and air and are very important for the smooth operation of the engine. Such holes can be cleaned with an aerosol or compressed air. The liquid cleaner can be reused. Some thrifty car enthusiasts use the cleaner several times.

After finishing cleaning the carburetor, dry it thoroughly and reassemble it according to the instructions. The cleaned carburetor will need to be installed in the car and re-tuned.

Source

Action

Has a complex effect:

• dissolution and removal of deposits from the float system, jets, idle passages and other parts;
• restoring idle speed;
• reducing the harmfulness of exhaust gases;
• facilitating cold engine starts;
• increasing engine response;
• reduction of fuel consumption.

Thanks to this action, it becomes possible to adjust the carburetor until the required efficiency is achieved.

Application

The cleaner is poured into the fuel tank before refueling. Then you need to fill the tank to the top and drive on this fuel until the reserve. One bottle of product is enough for 40-60 liters of fuel. The liquid should be used every three thousand kilometers. More often when using low-quality gasoline.

CARBURETOR CLEANER:

• HG3205 / 295 ml (PROFFY COMPACT);
• HG3206 / 325 ml.

Expert advice

The main harm of deposits that appear in the system is that these products interfere with the process of normal mixture formation. Consequently, fuel burns worse and more is required. In this case, the dynamics of the vehicle suffers. An effective way to correct the situation without disassembling the system is to use cleaners.

Properties and features of the products

The main tasks of a carburetor cleaner are to soften scale and remove various debris through corrosion. Therefore, cleaners contain special caustic chemicals:

• acetone;
• toluene;
• benzene;
• carbon compounds and inorganic substances;
• acids.

Some liquid products contain oils and additives to lubricate the carburetor.

A special feature of car cleaners is the ability to use two types of cleaner at once - aerosol and liquid.

Washing with partial disassembly

Let's consider the process of flushing a carburetor with its partial disassembly using the example of a Solex carburetor and Jet 100 Ultra. You don't need to buy a lot of it. One 200 ml can will be enough. The cost of this product is 450–500 rubles. In addition to the special liquid, you will also need:

• set of wrenches;
• Phillips and slotted screwdrivers;
• pliers;
• a container with a wide “neck” with a volume of 2–3 liters (for soaking the carburetor lid);
• a container with a wide “neck” with a volume of 0.2–0.5 l (for soaking small parts);
• kerosene (refined gasoline, acetone);
• tire pump or compressor with a tapering tip;
• toothpicks;
• old toothbrush;
• a clean, dry, lint-free cloth (preferably rough);
• a small wooden spatula (like an ice cream stick).

Washing procedure:

1. Open the hood.
   Remove the air filter cover by unscrewing the nut with a 10mm wrench and opening the 4 spring latches. To remove the cover you need to unscrew the nut and press the latches
2. We take out the filter element.
   Using a size 8 wrench, unscrew the 4 nuts on the studs securing the filter housing. Do not drop the nuts inside the carburetor! Remove the filter along with the rubber seal. Removing the air filter housing
3. Using a Phillips screwdriver, loosen the clamps of the fuel and ventilation hoses. Disconnect the hoses.
4. Disconnect the wire tip from the solenoid valve terminal.
   The power wire is connected to the solenoid valve
5. Using a Phillips screwdriver, unscrew the screws securing the cover to the carburetor body.
   There are only 5 of them. To remove the cover, you need to unscrew five screws
6. Carefully remove the cover from the body, being careful not to damage the gasket.
   The cover must be carefully removed so as not to damage the gasket.
7. Using a 13 key, unscrew the solenoid valve.
   Disconnect the idle jet from it. The valve is unscrewed with a 13 key
8. Using the same key, we unscrew the carburetor filter plug and the inlet fitting.
   Don't lose the O-rings located on both elements! The fuel filter is located under the plug
9. Using a slotted screwdriver, unscrew the air jets along with the emulsion tubes.
   The jets are unscrewed with a slotted screwdriver. Below them are emulsion tubes
10. Using a thin slotted screwdriver, pry up the upper “proboscis” of the sprayer and remove the sprayer.
    To remove the sprayer, you need to pry off its upper “proboscis”
11. Using a slotted screwdriver, unscrew both fuel nozzles.
    Fuel jets are unscrewed with a thin slotted screwdriver
12. Using pliers, remove the diffusers of both chambers.
    Diffusers are removed using pliers
13. We put all small parts, with the exception of rubber elements, into a small container and fill them with kerosene (gasoline, solvent).
    Before cleaning, it is recommended to soak the parts in kerosene or acetone.
14. Carefully place the carburetor cover, so as not to disturb the adjustment of the float mechanism, in a large container and also fill it with kerosene.
15. Let the parts soak for 30–60 minutes.
16. Take a bottle of cleaning agent.
    We attach a tube to its sprayer (included in the kit). We apply liquid to the internal surfaces of the carburetor body (walls of the float chamber, air and fuel channels, throttle valves, their drive elements). After this, we process the outside of the carburetor. Let the product “work” for half an hour. Apply liquid to the internal surfaces of the carburetor
17. In the meantime, take a toothbrush and clean the carburetor cover from the inside, and then from the outside.
    To remove complex contaminants, use a wooden spatula. If necessary, wipe the lid with a clean cloth. The lid must be removed first from the inside, then from the outside.
18. We take out the small parts of the carburetor from the kerosene and treat them with cleaning liquid from the inside.
    After processing, we blow out all the jets, the plug strainer, the accelerator pump nozzle, the emulsion tubes, and the diffusers with a stream of air. To do this, we use a pump or compressor. If there is visible contamination of the channels, remove them with toothpicks. After washing, the jets must be blown out with a stream of air.
19. Using a clean rag, carefully wipe the carburetor body. There is no need to wipe the interior surfaces!
20. We reassemble the carburetor in the reverse order. We do not install the air filter housing.
21. Let's start the engine. We take a bottle of cleaning liquid and spray it into the carburetor, periodically “gassing”. We continue this procedure for 2–3 minutes.
22. We turn off the engine and install the air filter.

Cleaning, cleaning carburetors 2108, 21081, 21083 Solex and 2105, 2107 Ozone

Maintenance of carburetors 2108, 21081, 21083 Solex and 2105, 2107 Ozone mainly comes down to external cleaning and internal cleaning, as well as basic settings and adjustments.

The frequency of these procedures is once a year, and then only on condition that the contamination has reached such a degree that it interferes with the operation of systems and mechanisms (moving moving parts is difficult, channels, jets, float chambers, etc. are clogged) or in a situation where sudden blockage affects the efficiency of the carburetor.

External carburetor cleaning

Washing the external surfaces of Solex and Ozone carburetors can be carried out before making adjustments or, as previously written, before annual maintenance.

To carry out external cleaning of the carburetor, you must have a can of aerosol liquid for cleaning carburetors or 0.5 liters of acetone, a small brush and a lint-free rag. We remove the air filter housing, plug the carburetor from above with a rag so that dirt does not get inside, and successively apply aerosol from a can or acetone with a brush to each outer surface of the carburetor. We wait a couple of minutes. Using a brush, carefully and thoroughly, we remove the dissolved dirt from the recesses and flat surfaces. If desired, you can additionally wipe the outer surfaces with a rag moistened with gasoline or diesel fuel. After cleaning, blow the carburetor with compressed air from a pump or compressor.

Carburetor cleaning

We will clean the channels, jets, float chamber, and fuel filter. Very often, especially when the car has been in use for long periods of time, tar deposits accumulate in the channels and jets of the carburetor, reducing their cross-section, black and brown varnish deposits accumulate on the diffusers and walls of the mixing chambers, and sediments brought from the gas tank are deposited in the mesh filter and the float chamber.

You can clean all this equipment without removing the carburetor from the car engine, except in cases where it is completely coked. To do this, purchase a can of aerosol carburetor cleaner from the store, remove the air filter housing, and start the engine. We spray it into the carburetor from above, while periodically turning the throttle valve drive lever of the first chamber by hand so that the carburetor is properly “gassed.” We repeat this operation several times, trying to get the aerosol not only into the mixing chambers, but also into the channels of the air jets of the Main dosing systems of both chambers (they are clearly visible from above).

Places for cleaning Solex and Ozone carburetors

Next in line is the idle system. With the engine running, pull out the choke so that the rpm is at least 3 thousand. We completely unscrew the solenoid valve or the holder of the fuel jet of the idle system (depending on the carburetor model). And spray the aerosol directly into the hole formed. It’s worth giving the throttle a little with your hand again. After the procedure, blow out the fuel jet in the solenoid valve or holder and screw it back in.

Solenoid valves Solex and Ozone

Next is the float chamber. To clean it, you need to remove the top part of the carburetor (its cover). Use a rag to blot off all the gasoline in the float chamber. Pour acetone into it and let it sit for a while. Use a rag to carefully remove the bulk of the dirt, and use a brush to remove the rest. On a Solex carburetor, the structure of the float chamber is not very convenient for cleaning, so you can use a thin slotted screwdriver, the blade of which is wrapped in a rag, as an additional tool for cleaning recesses and inconvenient places. After cleaning, blow out the float chamber with compressed air.

Solex and Ozone float chambers

Since the carburetor cover has been removed, it is very convenient to unscrew the fuel and air jets and remove the emulsion tubes of the main carburetor metering systems. We also remove the accelerator pump nozzle. Soak everything removed in acetone for about fifteen minutes, then blow it with compressed air and install it back.

We clean Solex and Ozone gas pumps

And finally, a fuel filter at the inlet to the carburetor. We unscrew its plug and remove it from the hole. Soak briefly in acetone and then clean with a toothbrush. We blow it out and put it back, after making sure that there is no dirt in the hole where we screw it in.

Filters and plugs Solex and Ozone

After cleaning and cleaning the carburetor, you should adjust the operation of its main systems and mechanisms and generally set it up for normal operation.

Carburetor adjustment and tuning

We adjust and tune the carburetor in this sequence, although this is not necessary, it seems to me the most optimal. — Adjusting the fuel level in the float chamber of Solex and Ozone carburetors — Adjusting the air damper drive of Solex and Ozone carburetors — Adjusting the throttle valve drive of Solex and Ozone carburetors — Adjusting the starting device of Solex and Ozone carburetors — Adjusting the idle speed of Solex and Ozone carburetors

Notes and additions

— For a more complete and thorough cleaning of Solex and Ozone carburetors, you should remove the carburetor from the car engine. Disassemble and set aside all gaskets, diaphragms and rubber parts. Soak two parts of the body and the lid for 10-12 hours in a container with acetone. Then blow it with compressed air under a pressure of at least 6-8 atmospheres, put everything back together and install it on the engine. — There is another method of cleaning the carburetor, a non-disassembling one. To be honest, it is a little dubious, but its use for preventive purposes is quite possible. For 20 liters of gasoline in the gas tank, fill 0.5 liters of acetone and drive. It is advisable to do this filling before active use of the car, so that it does not stand, but drives.

Source

We clean

Before you begin cleaning, remember a few important tips:

• The carburetor can be cleaned and flushed without removing it from the car;
• To gain access to diffusers and other important elements, simply remove the air filter;
• It is better to leave the float chamber cover in place. However, if it is not dismantled, access to the fuel nozzles will be blocked.

Let's use the second tip and see the cavities of the two chambers:

This is what a VAZ carburetor looks like (the air filter has been removed)

The following elements are now available:

• Air jets (two identical parts in the center);
• Diffusers;
• Air dampers.

When cleaning the jets, you can unscrew them, but it is better to leave all the elements in place. Use compressed air or a special aerosol (see below)

But cleaning moving parts must be done with caution: the standard factory lubricant should not be washed off

After dismantling the strainer, you can wash it in acetone or diesel fuel and also “blow it out” with compressed air. Having installed the element in place, tighten the nut and check how tight the connection is.

Fuel filter with plug nut

To perform this check, fuel is pumped in to the maximum, rotating the fuel pump shaft by hand. The shut-off needle should block the inlet. If the cork remains dry, then no mistakes were made.

If you decide to remove the float chamber cover, you must first do the following:

1. Loosen the clamps securing all fuel hoses;
2. Remove each hose from the fitting;
3. Disconnect electrical connectors (if any).

The lid itself is placed on a horizontal surface with the floats facing up. Anyone who breaks this rule will have to adjust the locking mechanism, which in reality is quite difficult to do. The result of all actions looks like this:

Float chamber cover

Reassembling the unit after cleaning it is carried out in the reverse order.

Is it possible to wash it at home without special products?

If you do not have the opportunity to use special products to flush the carburetor, you can do it without them. To do this, simply soak the necessary parts in kerosene (gasoline, acetone) overnight, and in the morning start cleaning and blowing them. With the right approach, the effect will be no worse. But under no circumstances follow the advice of “experts” who recommend pouring a little acetone into the tank or carburetor to clean the fuel system! Yes, acetone perfectly dissolves and removes dirt, carbon deposits, paint residues and even water. But it also dissolves seals, gaskets, and valves made of plastic and rubber!

As you can see, cleaning the carburetor with your own hands is not at all difficult. The main thing is to have a good cleaning product, the necessary tools and a few hours of free time. And to prevent this process from becoming a habit, fill only high-quality fuel into the tank of your car.

Other washing methods

Sometimes it happens that there is no special means for cleaning the working unit nearby.
In such cases, solvent No. 646 can help. Although you shouldn’t rely too much on it. The effectiveness of this cleaning method is quite low, and it only allows for a short period of time to remove contaminants from the surface of the carburetor. The proper operation of this part depends not only on the frequency of its cleaning, but also on the product used. In order not to make a mistake in choosing this product, you need to carefully familiarize yourself with its composition and properties in the store. It is imperative to take into account the activity of using the cleaning agent. We should also not forget that all elements of the fuel system require regular cleaning. To ensure proper operation of the carburetor, it is recommended to clean it of dirt every 10-15 thousand km.

Trouble-free operation of a vehicle depends on many components, not least of which is the carburetor. Every car owner should regularly check its condition. This is especially true for those who use low-quality fuel. This factor increases the likelihood of clogging by an order of magnitude. But you can avoid the negative consequences caused by a dirty carburetor if you clean it regularly.

Every car owner can handle this task with his own hands, so you don’t even have to turn to specialists for help. When disassembling this power unit, it is only necessary to remember the location of the main parts. But first you need to understand what is the best way to flush the carburetor.

This must be a special composition designed to remove contaminants from the internal and external surfaces of the working unit. It is not recommended to save on the purchase of cleaning fluid, otherwise this may soon result in new, even more serious problems for the car owner, the elimination of which will require not only more time, but also financial costs.

Most new gasoline cars are equipped with fuel injection systems. However, on our roads there are a sufficient number of cars with carburetor engines. They often have weaker performance characteristics, but remain popular due to their high self-repairability.

Most systems in carburetor cars can be put in order in a garage with a minimum set of auxiliary tools. The list of available operations also includes carburetor cleaning.

Symptoms of pollution

Every owner should know when to start worrying and flush the carburetor. The critical state of this element can be determined by a number of characteristic features:

• significant dips during sudden acceleration and delayed response when pressing the accelerator pedal;
• unstable idling, speed becoming floating;
• difficulty starting a cold or hot engine;
• presence of high toxicity and smoke;
• significant reduction in power and increased fuel consumption.

Unfortunately, it is not always possible to say that the source of the problem is the carburetor when the above symptoms appear. Therefore, in such cases, it is imperative to first carry out a full diagnostics of the engine. Only after this can you start thinking about how to clean the carburetor.

If you constantly monitor the condition of this unit and regularly clean it, this will subsequently allow you to avoid many unpleasant moments, including unnecessary financial expenses and loss of time due to vehicle downtime.

Important Tips

After the carburetor has been cleaned, it must be reassembled in the same order.
During disassembly, you must immediately remember where the fuel and air jets were located. In addition, the float chamber level and idle speed should be adjusted. Considering this opportunity, after cleaning the power system unit, you should check the condition of the fuel pump and fuel tank. Some vehicles may have a mechanical fuel pump. It also needs to be checked and, if necessary, cleaned with an aerosol cleaner. If this is not done immediately, then very soon the dust present on the membrane and valves of the pump may again enter the carburetor and lead to new blockages.

To restore the fuel tank to proper condition, it will first have to be dismantled. Experts also recommend regularly cleaning this unit, since a lot of dirt often accumulates in it due to the use of low-quality gasoline. Subsequently, the sediment formed in the fuel tank can penetrate into the carburetor, and this happens with enviable regularity, even though fuel enters it through the fuel filter and the float chamber mesh.

To bring the fuel system into working condition, it is necessary to clean all key elements, starting with the gas tank and ending with the carburetor. Using an integrated approach will ensure stable engine operation and normalize fuel consumption.