Motoblock is one of the most useful household units. Even a simple and not very powerful machine can significantly facilitate the care of the garden and the local area. At the same time, a walk-behind tractor is a technique that tends to break. Let's look at the most common breakdowns of an agricultural unit, their causes and methods for eliminating them on our own.
Why does the walk-behind tractor stall under load?
Almost every owner of a walk-behind tractor, regardless of the brand and model of an agricultural unit, has encountered a problem in which the walk-behind tractor starts up and stalls after 5 minutes of operation. The main reasons for this breakdown lie in problems with the fuel supply and breakdown of the ignition system of the car.
As practice shows, if the walk-behind tractor stalls during operation, then its owner should immediately inspect the details of the fuel supply system. First of all, turn it out and look at the candle - if it is completely dry, then this indicates that the fuel does not enter the engine cylinder. After that, you need to make sure that there is enough fuel in the fuel tank. If there is gasoline and it is enough for work - inspect the fuel valve - it is quite possible that it is in the closed position. To start the walk-behind tractor, it is enough to open the fuel valve and continue working with the unit.
Another reason why the walk-behind tractor starts up and stalls after 5 minutes of operation is a breakdown in the ignition system. It is quite simple to determine that the unit is faulty precisely for this reason - take a look at the candles - if they are wet, then the malfunctions appeared precisely in the ignition system of the walk-behind tractor. The best way out of this situation is to re-adjust the ignition system of the unit. All actions, in this case, must be performed in this order:
- Remove the cover that protects the elements of the ignition system;
- Turn the flywheel of the motor until the contacts open in the magneto;
- Using a special feeler gauge, measure the gap between the “anvil” and “hammer” of the walk-behind tractor ignition system;
- After this, turn the flywheel until the walk-behind tractor piston is compressed. In this case, the latter must reach its highest point;
- Turn the flywheel again until you hear a characteristic knock - this means that the overrunning clutch has worked;
- Then turn the flywheel in the opposite direction so that the mark on it coincides with the mark on the body of the walk-behind tractor;
- Set the gap between the interrupt contact and the cam - it should be 0.3 mm;
- At the end, fix the cam with a screw located on top of the part and install the protective cover back into the walk-behind tractor body.
After the above actions, the walk-behind tractor will no longer stall under load. The main thing in the event of such problems in the future is to try to eliminate the breakdown as quickly as possible so as not to give in to increased wear on the main mechanisms of the walk-behind tractor.
Also, often the economic unit stalls when tilted. This indicates an insufficient amount of fuel in the fuel tank. If you put the unit in a horizontal position, pull out the starter cable, and the engine starts, then you will need to add gasoline to the tank.
Causes of malfunctions of the walk-behind tractor and methods for their elimination
Fault: walk-behind tractor stalls under load
If the walk-behind tractor functions normally for several minutes and then stalls, the cause is usually a fuel supply failure or problems in the ignition system.
To find out what is the cause of the walk-behind tractor malfunction, you must first check how the fuel is supplied:
- get a candle and inspect - if it is dry, then there is not enough fuel;
- check if there is enough fuel in the gas tank of the walk-behind tractor;
- make sure the fuel valve is open - a blocked valve can be a simple reason that the walk-behind tractor stalls.
If the problem is a malfunction of the gasoline walk-behind tractor in the ignition system, it must be re-adjusted as follows:
- remove the cover protecting the ignition system;
- turn the flywheel of the engine until the contacts open in the magneto;
- using a feeler gauge, measure the distance from the anvil to the malleus;
- turn the flywheel to the maximum compression of the piston;
- turn the flywheel again until a knock appears, indicating the operation of the overrunning clutch;
- turn the flywheel in the other direction so that its mark coincides with the mark on the walk-behind tractor body;
- set the distance from the interrupt contact to the cam to 0.3 mm;
- fix the cam with a screw that is above the element;
- install the cover in the body of the walk-behind tractor.
If the adjustment is made correctly, the walk-behind tractor will not stall during operation.
Fault: walk-behind tractor works jerkily, intermittently or at reduced power
If the walk-behind tractor on a gasoline or diesel engine began to work intermittently, you must immediately turn off the unit and start troubleshooting.
To continue working with a faulty walk-behind tractor means to bring it to more serious breakdowns.
What to do:
- if the engine of a gasoline walk-behind tractor makes return movements, it is necessary to flush the pump and fuel supply hoses and replace the fuel with a better one;
- when the walk-behind tractor works jerkily due to incomplete warming up of the engine, it is necessary to turn off the engine, let it cool completely, start and warm up for ten minutes;
- if the engine power has dropped, it is necessary to check and clean the filter system;
- if the ignition magneto has worn out, it is necessary to replace the part with a new one.
Malfunction: the walk-behind tractor smokes and stalls, the muffler makes unusual sounds
Possible causes of the malfunction:
- too much engine oil in the fuel;
- the ignition is set incorrectly;
- fuel is not completely burned in the engine cylinder.
Troubleshooting methods:
- in case of excess oil, drain the fuel, flush the fuel pump and hose system, fill in new fuel;
- check the correctness of the gap between the electrodes;
- if it becomes obvious that the fuel does not burn completely, disassemble the piston system, rinse and dry the cylinder, and adjust the carburetor correctly.
Fault: walk-behind tractor starts, but quickly stalls
Such a malfunction occurs if there are problems with the contacts. What to do:
- clean the candle;
- check the integrity of the wires;
- set the correct distance between the electrodes.
Another cause of the malfunction is the carburetor is dirty, and little fuel is supplied. Then you need to change the fuel and reduce the amount of oil.
Fault: walk-behind tractor stalls when heated
This problem occurs due to excess air entering the carburetor. With such a malfunction, the gas trigger should be squeezed out halfway. After starting the engine, before starting work, it is necessary to gas well.
If you cannot cope with the malfunctions of the garden walk-behind tractor, the walk-behind tractor stalls, the walk-behind tractor does not start, contact the Alfa-Rost walk-behind tractor repair shop in Rostov-on-Don. We guarantee high-quality repair of gasoline walk-behind tractors using original components that are always available in our warehouse.
When your hitherto trouble-free walk-behind tractor starts to act up, it's very annoying. It is doubly annoying when this happens in a situation where there is a lot of work and without a walk-behind tractor, like without hands. It seems to start up normally, but once you give it a load, it immediately sneezes and stalls. What is the reason for this "betrayal"?
Why does the walk-behind tractor work intermittently?
Among other typical malfunctions of the walk-behind tractor, a number of such breakdowns can also be distinguished:
- The motor of the unit hits the return line - this indicates the use of low-quality fuel for refueling the unit. In this case, you will have to not only replace the fuel, but also thoroughly flush the fuel pump and fuel supply hoses;
- The walk-behind tractor works in jerks - the reason for this lies in the insufficient warming up of the motor. Be sure to turn off the engine, wait for it to cool completely, and start the engine again, giving it at least 10 minutes to warm up completely;
- The motor block motor does not noticeably pull, the engine power has decreased - in this case, you need to check and, if necessary, clean the air and fuel filters. Another reason for this failure lies in the wear of the magneto of the ignition system. It is best to replace the part immediately without trying to repair it.
The owner of both a gasoline and a diesel walk-behind tractor equally often encounters this kind of malfunction. In any case, you must immediately stop working with the machine, and repair its breakdown as soon as possible.
Other Common Engine Starting Problems
What to do if the motor of the walk-behind tractor works intermittently and does not develop the required power? There can be several reasons for this behavior:
- Air filter clogged.
Air does not enter the carburetor, which means that the fuel does not burn well - the filter will have to be cleaned or changed.
Residues of fuel, as well as products of its combustion, form a thick coating on the inner walls of the muffler, which must be removed.
In this case, the assembly will have to be removed, disassembled and all its components should be cleaned properly. After that, the carburetor must be assembled and properly adjusted.
- Wear of the cylinder-piston group.
Why does the walk-behind tractor shoot at the muffler?
Often, when working with an agricultural unit, loud uncharacteristic sounds are clearly audible from its muffler. At the same time, the walk-behind tractor also smokes heavily and stalls. To be able to fix the problem with your own hands, you first need to determine its essence.
Most often, the walk-behind tractor shoots at the muffler due to a number of the following problems:
- An excess of engine oil in the fuel mixture - in this case, you need to drain the remaining fuel, flush the fuel pump and hoses, and fill in new fuel with less oil;
- Incorrectly set ignition - if the mechanism works late, then this leads to the appearance of atypical shots that are clearly audible in the silencer area. In such a situation, you should immediately set the correct gap between the electrodes of the ignition system of the walk-behind tractor;
- Incomplete combustion of fuel in the engine cylinder. Repair of a walk-behind tractor engine in this case involves disassembling the piston group, thoroughly washing and drying the engine cylinder, as well as tuning the walk-behind tractor carburetor.
Repair of all the above breakdowns does not require special skills and extensive experience. The most important thing is to act strictly in accordance with the operating instructions for the agricultural unit.
Motoblock starts and stalls - causes and repair
Repair of walk-behind tractors in case they start up and, after a few seconds, stall, it is necessary to start by finding the main causes of this malfunction. To do this, you need to look at:
- Candles, wires and electrodes - in most cases, the unit starts and immediately stalls due to too large a gap between the electrodes of the ignition system, poor contact between the wires, and a dirty spark plug. Repair should begin with cleaning the candle. If this does not help, then you need to check the integrity of the wires. If this did not bring the desired result, then it will be necessary to re-set the gap between the electrodes of the ignition system;
- Carburetor for contamination and sufficient fuel supply - if you used low-quality gasoline and added too much engine oil to it, then you will need to change the fuel and reduce the amount of oil. In addition, you need to dismantle, disassemble, and thoroughly clean the carburetor;
- The presence of gasoline in the fuel tank - if the walk-behind tractor is not gaining momentum, then this often indicates a lack of fuel necessary for the engine to work properly. Very often, owners of walk-behind tractors are faced with a problem in which gasoline spills through a small hole or crack in the fuel tank of the car. In this case, you need to try to repair the defect, and if this was not possible, you will need to completely replace the walk-behind tractor tank.
Another less common cause of a breakdown in which the walk-behind tractor does not develop speed is a gearbox malfunction, which is indicated by a third-party sound from the gearbox side. To fix the breakdown, you need to change the oil that you use to lubricate the assembly.
Fuel supply problems
If during operation the walk-behind tractor stalled and no longer starts, then most likely the problem is in the engine or in the starting system. The first thing to do in this situation is to carefully inspect the spark plugs. Dry spark plugs mean that the fuel is not getting to the engine cylinders.
In such a situation, first of all, check the presence of gasoline in the tank. It is possible that, due to your forgetfulness, the walk-behind tractor has used up all the gasoline, and you simply need to refuel it for further work. If everything is in order with gasoline, check the fuel valve - it may be closed. In this situation, there is also nothing difficult - just open the tap, and the motor will come to life again. It also often happens that during operation, the walk-behind tractor stalls with a strong roll. You need to put it horizontally. If the engine starts in this position, it means that there is little gasoline in the gas tank and when tilted, it simply does not come from the gas tank, you need to refuel.
The next thing that often happens is the drain hole in the gas tank cap is clogged. You need to clean it, and the problem will be solved. It often happens that some kind of rubbish got into the fuel system, especially considering today's quality of gasoline. In this case, you need to remove the fuel valve, drain the gasoline from the tank and rinse everything thoroughly, and then disconnect the connecting hose from the carburetor and blow it through thoroughly.
The engine of the walk-behind tractor is difficult to start on a hot
The question of why the motor block motor stalls when heated is quite simple to solve. The whole essence of the problem lies in the excess of air supplied to the carburetor of the walk-behind tractor. Part of it is mixed with a mixture of gasoline and engine oil, and the second part cools the carburetor. As a result of this, the temperature of the carburetor becomes much lower than the temperature of the engine of the unit. Such a problem is observed only during the operation of the walk-behind tractor. When his engine is turned off, the carburetor, on the contrary, lends itself to heating from the hot walls of the motor.
During the heating of the carburetor of the walk-behind tractor, the remaining fuel begins to actively evaporate, filling all the voids in the walk-behind tractor, including the air filter and intake manifold. This leads to the complete disappearance of fuel, due to which the walk-behind tractor does not start when the engine is hot.
To fix this problem, it is necessary to act in a certain algorithm every time you start the walk-behind tractor "hot". Your main task is to achieve a combination of the mixture so that the engine can start. This will require:
- In the process of starting a hot engine, squeeze the gas trigger halfway;
- Do not try to press the gas trigger over and over again, otherwise you will only aggravate the situation, since during frequent pressing of the gas trigger the fuel pump will supply new portions of fuel to the carburetor, which will lead to engine flooding;
- After several attempts to start with the gas trigger half pressed, you will start the walk-behind tractor engine, after which you will need to gas it 2-3 times and continue working.
This procedure will eliminate the increased load on the hot motor, so that the main parts and mechanisms of the walk-behind tractor will not succumb to excessive wear.
All of the above methods will help to effectively deal with typical breakdowns of the most famous manufacturers of walk-behind tractors. They are equally successfully used by owners of agricultural equipment brands Honda, Agro, Cascade and Neva.
