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EPHIL: Your Trustworthy Engine Carburetor Supplier!

EPHIL is the leading supplier of gasoline engines and power systems for model aircraft and drones. Our company was established in 2020. Our main products include aircraft gasoline engines, glow gasoline engines and engine parts. Some models are equipped with larger air, fuel and oil filters, hardened crankshaft journals and self-draining choke carburetors . These engines are widely used in model aircraft, drones and other equipment, with powers ranging from 100 horsepower to 375 horsepower, and are exported to more than 25 countries and regions.

Rich Experienced

Our team consists of several engine engineers, electrical engineers, and product designers. We are good at engine design, production and debugging, and work closely with well-known companies such as Kenncth, Vossen, Westin, ACDelco, Coverking, etc.

High Production

We have our own R&D center and complete production workshop, equipped with professional cylinder processing, quality measurement, CNC, precision lathes and other equipment, which can fully cover the needs of large-volume urgent orders.

Quality Assurance

All the products have registered trademarks in Germany and the United States, invention and design patents in the United States, Japan and China, and have obtained CE, FCC certification and RoHS certificates.

Customized Services

These engines are widely used in remote control aircraft, aircraft models, and UAV models, and support OEM and ODM custom designs to provide versions with different capacities and strokes.

 

 

  • Carburetor Diaphragms And Repair Kits

    Carburetor Diaphragms And Repair Kits

    Carburetor kits that could be used to repair the jammed or aged Walbro carburetors.
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  • Walbro Carburetor WT-962

    Walbro Carburetor WT-962

    Model: Walbro Carburetor WT-962. Suitable for the following engines:. X-20-S; X-20-R; X-20-S PRO;
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  • Walbro Carburetor WT-978A

    Walbro Carburetor WT-978A

    Model: Walbro Carburetor WT-978A. Suitable for the following engines:. X-38-S; X-38-R; X-38-S PRO;
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  • Walbro Carburetor WT-978B

    Walbro Carburetor WT-978B

    Model: Walbro Carburetor WT-978B. Suitable for the following engines:. X-40-T; X-40-T PRO. XG-40-T;
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  • Walbro Carburetor HDA-246A

    Walbro Carburetor HDA-246A

    Model: Walbro Carburetor HDA-246A. Suitable for the following engines:. X-76-T; X-76-T PRO.
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What is Engine Carburetor?

 

 

An engine carburetor is a device that mixes fuel and air together to help with internal combustion in an engine. They are located above the engine block, beneath the air filter, using a combination of vacuum power and cable control to send the fuel-air mixture into the engine cylinders for ignition. The speed of the air flow determines the amount of fuel drawn into the airstream. Since the 1990s, carburetors have been largely replaced by fuel injection for cars and trucks, but carburetors are still used by some small engines (e.g. lawnmowers, generators, and concrete mixers) and motorcycles. In addition, they are still widely used on piston engine driven aircraft.

Features of Engine Carburetor

 

Easy to Install
Our carburetors come with choke wires with plugs that work with resistors for an easy bolt-on effect, making it easy to connect to different engine sizes and models.

 

Flexible Operation
They increase horsepower by 5~10% for better engine performance, giving your model aircraft the new power it deserves, and can flexibly switch between idle and high-speed operation.

 

Durable Materials
These carburetors have durable components, such as the venturi tube being made from lightweight aluminum, while the moving parts are made from stainless steel and are finished with an anti-corrosion coating.

 

Safe Control
Our engine carburetors are equipped with emission control systems and use solenoid valve technology to prevent unnecessary pre-ignition in the engine and avoid damage to engine function.

 

Types of Engine Carburetor

There are three different types of carburetors which are described based on the direction of airflow:

Walbro Carburetor HDA-246A

 

Up-draft Carburetors

 

One of the most common types of the carburetor is up-draft. In the following type, the air comes into the carburetor from the bottom and exits from the top to go into the engine. The mixture of fuel and air is created as soon as the fuel exits from the fuel pipe and gets in contact with the air that has flown in. The throttle valve which is directly related to the accelerator aids in the passage of fuel. Once the mixture reaches the engine cylinder, the combustion process is carried out. Gravity helps the air-fuel mixture flow into the cylinder, which is why larger passageways and slower air speeds are used in this carburetor's operation.

 

Horizontal Type Carburetors

 

When there is not enough room to place the carburetor, a horizontal sort of carburetor is employed. As implied by the name, the jet tube is positioned horizontally instead of straight. The air enters the carburetor via one corner, keeping it in a horizontal posture. Before entering the engine cylinder for combustion, it blends the fuel. Horizontal carburetors help in lowering the flow of resistance since it is not positioned at a right angle direction.

 

Down-draft Type Carburetors

 

The following is the most advantageous and used type of carburetor. In the following carburetor, the air flows in from the top of the mixing chamber and the fuel comes in from the lower side of the mixing chamber. The combination of fuel and air is done here because of the low pressure produced by two venturis. The low pressure allows the fuel to let itself out from the pipe and therefore mix with the air. For fast speed and great power output, the downdraft carburetor can deliver enormous volumes of fuel when required.

Components of Engine Carburetor
 

Float Chamber
Float Chamber or combustion chamber is one of the important carburetor components. When a car is fully fueled, the float will automatically rise and will close the fuel valve. Float work will follow the high and low fuel conditions of a car.
When there is too much gasoline and it causes flooding, the performance of the float will not function properly. As the name implies, the combustion chamber functions as a room for combustion, and it is positioned at the cylinder head. The combustion chamber will be a place of combustion that mixes fuel with compressed air from a piston in the cylinder.

 

Floater
A floater is also another important component in a car, despite it being small in shape. To maintain the stability of its performance, the condition of the floater must be checked regularly.
Floaters will indeed work in high or low fuel conditions. It will not work when there is too much fuel or flooding. With the presence of a floater, the fuel condition will remain stable.

 

Choke Valve
The car must be made as comfortable as possible so that you and your family can carry out daily activities smoothly. The car must be kept stable and repaired immediately if there are any problems occurring. Routine maintenance is very important to do and must be done for internal and external components.
Choke Valve is a carburetor component that can provide comfort in a car. The main function of the choke valve is to add to the mixture in a car's fuel so that the vehicle will be easy to start and use for various daily activities.

 

Throttle Valve
The throttle valve becomes a carburetor component which is also often referred to as a piston valve. The throttle valve has a function as a regulator of how high or low the level of air mixture entering the car’s combustion chamber. The throttle valve component will usually work alongside each other with the skep needle or the main jet.
When the throttle valve is open, the main jet will open too. The throttle valve and the main jet are also sometimes considered as one single unit. The throttle valve is one of the components that needs maintenance to ensure the stable condition of your car’s performance.

 

Main Jet
The main Jet or a skep needle is a car component that functions to regulate how much fuel in a vehicle will be mixed or combined with clean air. The main jet has a conical shape and gets tapered downwards, allowing it to lift when the gas is pulled.
If the mixture of fuel and air gets bigger, the car will have faster performance. Although the main jet has a small form, its role is still important. To keep the performance of the main jet stable, you must carry out routine maintenance of the car and this can be done by bringing the car to the car repair shop once a month.

 

Jet Needle
Another important part of the carburetor is the jet needle. The jet needle component may not be known a lot by a novice, however, it’s still important to check its condition. Through regular checks, the car's performance will work well.

 

Slow Jet
Slow jet is a carburetor component useful for supplying clean fuel and air when the car is in an idle position. If your car is in an idle position, all you need to do is set the slow jet in the carburetor and reset the needle, so that it’s performance can return to normal.

 

Piston Valve Screw and Pilot Screw
Piston valve screw and pilot screw in a carburetor have no less important function to support your car’s performance. The piston valve screw and the pilot screw are indeed similar in shape to the slow jet but differ in terms of function or usability.

 

Main Nozzle
The main nozzle is also a less familiar carburetor component but has a very important role still. This component will work as the main transmitter of a vehicle's fuel. The height of the main nozzle is also almost the same as the surface of the fuel which is positioned in the floating basin. The main nozzle is usually found on a carburetor that has a venturi type.

 

Venturi
The venturi is a narrow section that is positioned in the carburetor tube and it functions to increase the speed of the airflow. With the presence of venturi, the car speed will be fast and different from other types of cars.
Your car will run faster and can beat various types of other cars. Cars that have venturi can also be used for uphill road conditions because they can support the strength or speed of the car well.

 

How Does Carburettor Work?

The working process of a carburettor is as follows:
(1)From the air intake, airflow comes into the top of the carburettor by passing through a filter.
(2)After a certain intake of air, a choke valve blocks the further intake.
(3)The air passes through the narrow section of venturi, the velocity increases and creates a low-pressure pocket.
(4)As the air pressure drops, fuel comes from the fuel chambers.
(5)The fuel consumption is regulated by the throttle valve.
(6)Fuel and air get mixed and come into the cylinder.
(7)The fuel supply remains intact as the float chamber continues to supply it.
(8)Gradually, fuel pressure drops, and the valve at the top opens.
(9)As the combustion mixture enters the cylinder, it sends spark ignition to the engine.
(10)As combustion happens, the whole process starts repeating again

Walbro Carburetor WT-978A
Signs of a Failing Engine Carburetor

 

Over time, wear and tear can occur to the carburetor, and it might need to be serviced or replaced. Some symptoms include:


Reduced Engine Performance: The most common sign something’s wrong with the carburetor would be reduced engine performance. The carburetor wearing down can cause the air-fuel mixture to be off, resulting in a decrease in acceleration and power.


Backfiring/Overheating: These are also common symptoms of carburetor failure. A lack of fuel in the air-fuel mixture can cause these two issues to happen, which in severe cases can cause severe engine damage.


Black Exhaust: There should never be black smoke coming from the exhaust! This is likely a sign that the engine is using too much fuel or is fuel-rich. This can come from a carburetor that is worn and delivering excess amounts of fuel.


Difficulty Starting: A common problem stemming from a worn carburetor is hard starts or difficulty starting the engine. Issues messing up the air/fuel ratio can result in these problems.


If you experience any of these issues, it’s a good idea to take your vehicle to a trained technician who can diagnose and fix your problem. You don’t want to cause more damage to your engine by ignoring possible signs of carburetor failure!

Maintenance Steps of Engine Carburetor

 

 

Clean Filter
For the first step, you can start by cleaning the air filter by removing this part that is attached to the carburetor hole. If it has been successfully removed, then you can clean it using a burst of air compressor. When the air filter on the carburetor is made of foam, then you can wash it thoroughly and make sure the air filter is dry before installing it back. By taking care of the air filter, the carburetor can work stably for a long time.

 

Remove the Carburetor Component
You can start by opening the carburetor and please remove the bolts attached to all parts of the carburetor. To prevent leaks, it is recommended that you use the correct or appropriate keys to remove the various components of the carburetor. Prepare a container filled with liquid gasoline to remove the carburetor components.
The components that must be removed include the buoy needle, pilot jet, buoy, main jet, carburetor bowl, and other components. Make sure you are careful when removing small parts or rubber protectors. If all the components come off, make sure to keep them in the same container, so that it will be easier for you to put them back together.

 

Clean all Parts of the Carburetor
If all the carburetor components are removed and you can immediately clean all parts of the carburetor using a soft brush. Spray the air in the holes with high air strength. You can also use fine sandpaper to clean any dirt stuck to the pilot jet.
In the pilot jet section, the sandpapering process must be carried out slowly and carefully, because the sanding process can cause changes in the size of the sandpaper. If the sandpaper on the pilot jet is too hard, its shape may shrink.

 

Raft Back
When the cleaning process is complete and all the components are dry, then you have to assemble the various carburetor components to their original shape. Please restart the engine and set the airplane to idle by adjusting the wind main jet by turning it clockwise.
Next, turn it back according to the standards listed in the engine.

 
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Frequently Asked Questions of Engine Carburetor

 

Q: What is a carburetor in an engine?

A: carburetor, device for supplying a spark-ignition engine with a mixture of fuel and air. Components of carburetors usually include a storage chamber for liquid fuel, a choke, an idling (or slow-running) jet, a main jet, a venturi-shaped air-flow restriction, and an accelerator pump.

Q: Why do you need a carburetor?

A: It is the job of the carburetor to regulate how much fuel and air gets mixed so that you get the proper combustible mixture. It is also the job of your carburetor to control your engine speed. Your throttle controls the speed by controlling how much of this air and fuel mixture is allowed to get into your engine.

Q: Are carbureted engines better?

A: Carbs are dependable but not extremely precise in air-fuel delivery. They require service and repair at regular intervals. Carburetors can't typically meet modern fuel efficiency or emissions standards.

Q: What is aircraft engine carburetor?

A: The carburetor forms the engine's induction system and is responsible for mixing air and fuel. The mixture is then fed to each cylinder in the engine where it is ignited to generate power. A carburetor does this by use of what's called a venturi.

Q: Do all engines have carburetors?

A: Since the 1990s, carburetors have been largely replaced by fuel injection for cars and trucks, but carburetors are still used by some small engines (e.g. lawnmowers, generators, and concrete mixers) and motorcycles. In addition, they are still widely used on piston engine driven aircraft.

Q: What is the effect of carburetor on engine?

A: A bad carburetor can negatively affect an engine in several ways. It can cause poor fuel economy, rough idling, difficulty starting, and a lack of power during acceleration.

Q: What is the effect of carburetor on engine?

A: A bad carburetor can negatively affect an engine in several ways. It can cause poor fuel economy, rough idling, difficulty starting, and a lack of power during acceleration.

Q: Why do people prefer carburetors?

A: A carburetor is cheaper to buy, as well as repair with a repair kit. When you want massive power with high fuel flow rates and don't need to worry about fuel economy or other factors, a carburetor can give you that hit of fuel and power that an electronic fuel injection system would require extensive tuning to match.

Q: What is the disadvantage of carburetor engine?

A: Not the most efficient systems, dated design. Most carburetors have a slight lag, which results in relatively slow throttle response. Certain components like diaphragm are relatively delicate and prone to damage. Air fuel mixture fluctuates, affecting engine smoothness.

Q: Do modern cars use carburetors?

A: Carburetors are used in automobiles from many decades as an equipment to mix the air fuel mixture and supply it to the intake manifold of engine. It is fitted in between the intake manifold and air filter. But now a days FUEL INJECTORS are used in place of it.

Q: Can a car run without a carburetor?

A: Can a car run without a carburetor? If it is fuel injected, or a diesel, or electric, yes. Combustion engines need some way to put the right amount of fuel into the intake air, a carburetor is just one way to do that.

Q: Why carburetors are not used anymore?

A: Some of the reasons why carburetors have made way for fuel injection systems are due to its disadvantages. Here are the disadvantages of a carburetor: Not fuel-efficient as a fuel injection system. There is a certain amount of lag resulting in a slow response from the throttle body.

Q: Why don t cars use carburetors anymore?

A: Modern vehicles have transitioned away from “carbs” (which, in this case, is slang that does not refer to bread or grain products) in favor of fuel injection systems, which have a lot of advantages over carburetors: They don't require warming up, they're more efficient and more reliable.

Q: What does a carburetor do in a plane?

A: The carburetor forms a part of the engine's induction system and is responsible for bringing together and mixing the air and fuel. This mixture is then routed to each cylinder where it is ignited as part of the four-stroke engine cycle.

Q: Why do planes still use carburetors?

A: Carburetors offer the advantage of being able to easily control the fuel-air mixture. That's not a big problem for automobiles that operate closer to sea-level. It is a problem for aircraft that fly at higher altitudes where the air is thinner and there is a need to adjust the mixture to maximize engine performance.

Q: Does carburetor affect engine performance?

A: Yes, the problem can be many things, and one of them is a dirty carburetor. Even slightly pushing the air/fuel ratio too far to one side, whether too much fuel or air, can lead to broader reductions in engine performance.

Q: What are the two types of carburetors used in aviation?

A: Aircraft carburetors are separated into two categories: float- type carburetors and pressure-type carburetors.

Q: What are the parts of the carburetor on a plane?

A: The carburetor contains five critical parts—the float, the float chamber, the main discharge nozzle, the venturi, and the throttle valve. Because the air within the venturi is at a lower pressure than the ambient air, it creates a “vacuum” that draws fuel out of the main discharge nozzle.

Q: How many jets are in a carburetor?

A: On the bottom for the carburetor you typically have two jets. The pilot, the smaller of the two, and the main jet. Let's start with the pilot. The pilot jet handles the mixture from idle to 15 to 20 percent throttle.

Q: Why do people prefer carburetors?

A: A carburetor is cheaper to buy, as well as repair with a repair kit. When you want massive power with high fuel flow rates and don't need to worry about fuel economy or other factors, a carburetor can give you that hit of fuel and power that an electronic fuel injection system would require extensive tuning to match.

We're professional engine carburetor manufacturers and suppliers in China, specialized in providing high quality customized service, We warmly welcome you to buy or wholesale discount engine carburetor in stock here and get free sample from our factory. For price consultation, contact us.

Walbro Carburetor WT 978A, Walbro Carburetor HDA 246A, Walbro Carburetor WT 978B

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