Carburetor For Tiller
Along with the engine, the carburetor is one of the most important elements of the tiller, the main function of which is to enrich the fuel with air and supply the finished mixture to the engine of the unit. From time to time, the carburetor of an agricultural machine requires adjustment that will help reduce the amount of fuel consumed and increase the power of the tiller. It is not difficult to set up a carburetor, however, before working, you should prepare and study the sequence of actions when performing this procedure.
Tiller carburetor device. We study the mechanism from the inside
The carburetor for the tiller has a fairly simple design. Nevertheless, it should be studied, since in the future this will allow for timely adjustment and independent repair of the unit.
The device of the carburetor available in the tiller consists of the following elements:
- A float connected to a needle-type shutoff valve;
- Float chamber;
- Fuel mixing chambers;
- Diffuser and fuel atomization mechanism;
- Throttle body;
- Air and fuel valves with installed jets.
The float connected to the needle valve plays the role of a kind of regulator of the amount of fuel in the float chamber. As soon as the fuel level drops, the carburetor float drops, which leads to the opening of the needle valve. This contributes to the ingress of the missing amount of fuel into the float chamber. After the chamber is filled with gasoline, the float rises, closing, at the same time, the needle valve.
Between the float and mixing chambers is a spray gun that distributes gasoline to the mixing chamber. There, the fuel is mixed in the air, which, in turn, enters the carburetor through the inlet pipe. The amount of fuel available inside the float chamber is always a few millimeters below the level of the position of the outlet. This is necessary so that when the tiller engine is off, fuel does not spill out of the float chamber. This is especially necessary in cases where the tiller is located on a slope.
Tiller carburetor adjustment. Detailed procedure
There are a number of signs that indicate the need to adjust the built-in carburetor of the tiller.
- A sharp drop in the power of the tiller;
- Increase in the amount of exhaust emissions;
- Starting the tiller motor followed by spontaneous shutdown;
- Unstable operation of the engine of the unit idling;
- A rapid increase in the amount of fuel consumed.
There can be several reasons for all these malfunctions. Among them. The use of a tiller with excessive loads on its mechanisms, as well as a long simple unit without practical application. In any case, timely adjustment of the carburetor of the used agricultural machine will help to solve these problems.
Setting up a carburetor for an agricultural machine by itself is quite simple. Before adjusting, you will need to start the engine and let it run for 5 minutes. After that, you need to directly adjust the carburetor on the tiller.
The procedure is performed in the following sequence:
- After preheating, turn off the engine and install the tiller in a stationary position. Next, turn the screws that control the full and low gas to the stop, and then turn them out 1.5 turns in the opposite direction;
- Next, you will need to start the engine again and warm it up. This should take at least 5 minutes;
- Then you will need to set the engine speed control lever to the position of the lowest speed. While the engine should work;
- After that, you need to turn the adjusting screw the throttle position to the position at which the tiller engine will work most stably;
- Next, you need to turn the screw to adjust the low revs of the carburetor to the most extreme maximum position;
- Then you need to turn the throttle screw to the minimum position;
- The last two procedures should be performed until the engine starts to work without failures;
- After this, you need to set the engine speed control lever to the maximum gas position;
- In the end, you will need to turn the screw responsible for adjusting the maximum speed 2.5 turns in different directions to check the stability of the engine. You can learn more about carb setting from the.
After setting up the tiller carburetor with your own hands, you need to check the operation of the unit. If the engine started to run smoothly and consume less fuel, it means that the carburetor was adjusted correctly.
Cleaning the tiller carburetor. How to remove blockages yourself?
As a result of the intensive operation of the tiller over time, a large amount of dust and the products of evaporation of the fuel mixture accumulate in its carburetor. This adversely affects the efficiency of the mechanism, and in order to correct the situation, it will be necessary to thoroughly clean the carburetor.
This procedure is performed in the following order:
- First you need to remove the carburetor from the tiller;
- Then you need to drain all the fuel from the float chamber of the device;
- Next, you need to inspect the float fitting. If the fuel flows out of it too slowly, then the nozzle will need to be blown with compressed air from the cylinder. Then you need to turn the fitting 180 °. If after that the fuel stopped flowing out of the carburetor, then the fuel valve is fully operational;
- After that, you need to check the jets. To do this, you need to unscrew and remove the screws that are responsible for adjusting the full and low gas, as well as disconnect the lower and upper parts of the carburetor body. After that, flush the jets and fuel cock. For washing, it is best to use clean gasoline, or blow them with compressed air from a cylinder;
- Next, you need to decompose the carburetor parts for their complete drying. Carburetor assembly is carried out exclusively with absolutely clean spare parts.
During reassembly of the carburetor, it is very important to install the parts so that the spray tube is exactly opposite the hole in the top of the tiller carburetor. After that, you can install the carburetor on the tiller.
The methods described above for setting up and cleaning carburetors are suitable for owners of killers from the brands Pchelka, Agro, MTZ, Kaskad, Neva MB-1 and MB-2, as well as other units equipped with K-45 and KMB-5 carburetors.