uniaxial tractor won’t start and fires at the muffler

27th November 2021

Do-it-yourself breakdown elimination

Earlier, we examined why the cultivator does not start, and what are the reasons for the absence of a spark in the walk-behind tractor. Next, you should consider the moment with self-elimination of the following series of defects:

there is no spark (the problem lies in the candle, breakdown of the ignition coil, in any case, you can fix the malfunction yourself);
gears do not change (the breakdown is related to the clutch, or the gears are out of order);
a single-axle tractor works in jerks (uneven combustion of the fuel mixture or overflow of gasoline).

In each individual case, work is performed with a specific power plant, which is mounted on a single-axle tractor. Here you should take into account a number of nuances and features of the mechanism.

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Important! Modern devices are complex mechanisms where there are a lot of components, which is why, before trying to eliminate a defect, you should figure out why it can manifest itself.

Faulty timing

Malfunctions in the operation of the gas distribution mechanism are generally similar to problems with ignition. In particular, the exhaust valve opens when the gasoline has not yet burned out. Accordingly, it enters the exhaust system, leading to the already familiar pops in the muffler.

There are several reasons for faults in the timing system:

Timing belt wear. A symptom of this malfunction is the appearance of additional metal pops or noises when the engine is running at low revs. In this case, it is necessary to revise the belt and, if necessary, tighten or replace it. You can read how to do this in the corresponding material.
Worn toothed pulley. In this case, it is necessary to replace it.
Partial valve failure. Over time, they become covered with carbon deposits (especially when refueling the car with low-quality gasoline), which leads to a deterioration in the operation of the mechanism. And due to the hanging of the valve springs, the engine overheats. Therefore, it is worth checking the valves. If you find small roughness or bends on their surface, then grinding them in is a mandatory procedure. If the scratches are significant, they need to be sanded or valves replaced.

Usually, with a faulty timing, pops in the muffler are heard when the engine is warm. If the engine is “cold”, then they are not. This is another indirect proof of the guilt of the timing. However, for an accurate finding, it is necessary to perform additional diagnostics.

Defective ignition system

Another reason that the fuel does not burn completely and pops are heard from the exhaust pipe may be incorrectly set ignition. In particular, if the ignition is late, then pops in the muffler at idle and high revs are inevitable. This fact is very easy to explain. A situation occurs when a spark appears at a moment when the supply valve is already fully open, as a result of which part of the fuel does not have time to burn, but seeps into the manifold. And if the ignition is “early”, then the “shoot” will be in the air filter.

Late ignition can not only cause pops in the muffler, but also the appearance of a burnout of the intake valve over time. Therefore, do not overtighten with the ignition adjustment.

A weak spark can also be the cause of incomplete fuel combustion. In turn, this is a consequence of one of the facts:

Bad contacts on high voltage wires. It is necessary to revise them and clean them if necessary. You should also check that there is no penetration to ground.
Malfunctions in the distributor. It is also advisable to check its work.
Partially defective spark plugs. If at least one of them has exhausted its resource, this affects the power of the spark it gives out. Because of this, not all fuel is burned either. Check and replace spark plugs if necessary.

Use candles with the correct glow number. This will provide the necessary and sufficient spark power to burn all the fuel.

The main problems of the walk-behind tractor engine

Offhand to give an answer to such a seemingly simple question will not work. There are a lot of reasons why a uniaxial tractor is “naughty” and stalls during operation. They can be conditionally divided into several groups:

fuel supply problems;
malfunctions of the engine starting system;
malfunctions of control and automation;
problems with the muffler, cooling, etc.

If you notice problems in the operation of the walk-behind tractor, then the main thing that you must understand is that there are problems that you can easily fix with your own hands, even if you are not particularly versed in technology, but there are situations when it is impossible to do without a competent specialist and appropriate equipment. The most important task for you, as the owner, is to quickly and correctly determine why your single-axle tractor stalls, and make the right decision.

The engine of the walk-behind tractor does not start well when hot

The question of why the motor of the walk-behind tractor stalls when heated is quite simple to solve. The whole essence of the problem lies in the excess 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, the temperature of the carburetor becomes much lower than that of the engine of the unit. This problem is observed only during the operation of the walk-behind tractor. When its engine is turned off, the carburetor, on the contrary, lends itself to heating from the side of the hot walls of the engine.

During the heating of the carburetor of the walk-behind tractor, fuel residues begin to actively evaporate, filling all the voids in the walk-behind tractor device, including the air filter and the intake manifold. This leads to the complete disappearance of fuel, due to which a single-axle tractor does not start when the engine is heated.

To fix this problem, it is necessary to act in a certain algorithm every time the walk-behind tractor is started “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 pull the gas trigger over and over again, otherwise this 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 flooding of the engine;
After several attempts to start with the gas trigger half pressed, you will start the engine of the walk-behind tractor, 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, due to which 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 cope with typical breakdowns of the most famous manufacturers of walk-behind tractors. They are equally successfully used by the owners of agricultural machinery brands Honda, Agro, Kaskad and Neva.

Auto mechanic specializing in agricultural machinery

Currently, in agriculture and horticulture, special equipment is often used. Here, equipment such as a single-axle tractor stands out separately. These devices allow you to quickly and efficiently process the soil. However, like any type of equipment, such equipment can also fail. In this case, you need to consider how to do the right thing if the Agro single-axle tractor is faulty and does not start.

Why does a single axle tractor stall under load??

Almost every owner of a walk-behind tractor, regardless of the brand and model of the agricultural unit, has encountered a problem in which a single-axle tractor starts up and stalls after 5 minutes of operation. The main reasons for this breakdown lie in the problems with the fuel supply and the breakdown of the ignition system of the machine.

As practice shows, if a single-axle tractor stalls during operation, then its owner should immediately inspect the details of the fuel supply system. First of all, turn out and look at the spark plug. if it is completely dry, then this indicates that fuel does not enter the engine cylinder. After that, you need to make sure that there is a sufficient amount of fuel in the fuel tank. If there is gasoline and it is enough for work. inspect the fuel cock. it is quite possible that it is in the closed position. To start the walk-behind tractor, just open the fuel cock and continue working with the unit.

Another reason why a single-axle tractor starts up and stalls after 5 minutes of operation is a breakdown of the ignition system. It is quite simple to determine that the unit is faulty for this very reason. take a look at the candles. if they are wet, it means that the malfunctions have appeared 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:

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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 probe, measure the gap between the “anvil” and the “hammer” of the ignition system of the walk-behind tractor;
After that, turn the flywheel until the piston of the walk-behind tractor 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 freewheel has worked;
Then turn the flywheel in the opposite direction so that the mark on it coincides with the mark on the walk-behind tractor;
Set the gap between the break contact and the cam. it should be 0.3 mm;
At the end, fix the cam with the screw located on top of the part, and install the protective cover back into the walk-behind tractor body.

After the above steps, the single axle tractor will no longer stall under load. The main thing when such problems arise in the future is to try to eliminate the breakdown as quickly as possible so as not to give increased wear to the main mechanisms of the walk-behind tractor.

Also, the household unit often 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 rope, and the engine will start, which means that you will need to add gasoline to the tank.

Fuel supply problems

If the single-axle tractor stalls during operation and does not start anymore, then the problem is most likely in the engine or in the starting system. The first thing to do in this situation is to carefully examine the spark plugs. Dry candles mean that the fuel has no access 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 single-axle tractor has consumed all the gasoline, and for further work you simply need to refuel it. If everything is ok with the gasoline, check the fuel cock. it may be closed. In this situation, too, there is nothing difficult. just open the tap, and the motor will come to life again. It also often happens that during operation a uniaxial tractor stalls with a strong roll. You need to put it horizontally. If the engine starts up 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 plug is clogged. You need to clean it up and the problem will be solved. It often happens that some kind of rubbish got into the fuel system, especially given the current quality of gasoline. In this case, you need to remove the fuel cock, drain the gasoline from the tank and rinse everything thoroughly, and then disconnect the connecting hose from the carburetor and blow it thoroughly.

Why does a single axle tractor stall under load??

As practice shows, if a single-axle tractor stalls during operation, then its owner should immediately inspect the details of the fuel supply system. First of all, turn out and look at the spark plug. if it is completely dry, then this indicates that fuel does not enter the engine cylinder. After that, you need to make sure that there is a sufficient amount of fuel in the fuel tank. If there is gasoline and it is enough for work. inspect the fuel cock. it is quite possible that it is in the closed position. To start the walk-behind tractor, just open the fuel cock and continue working with the unit.

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 probe, measure the gap between the “anvil” and the “hammer” of the ignition system of the walk-behind tractor;
After that, turn the flywheel until the piston of the walk-behind tractor 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 freewheel has worked;
Then turn the flywheel in the opposite direction so that the mark on it coincides with the mark on the walk-behind tractor;
Set the gap between the break contact and the cam. it should be 0.3 mm;
At the end, fix the cam with the screw located on top of the part, and install the protective cover back into the walk-behind tractor body.

Also, the household unit often 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 rope, and the engine will start, which means that you will need to add gasoline to the tank.

Repair: why a uniaxial tractor stalls under load, shoots at the muffler, works intermittently, and more

a single-axle tractor is one of the most useful household implements. Even a simple and not very powerful machine can significantly facilitate the care of the garden and the surrounding area. At the same time, a single-axle tractor is a technique that tends to break down. Let’s look at the most common breakdowns of an agricultural unit, their causes and methods of elimination on our own.

Why a single axle tractor shoots a muffler?

Often, when working with an agricultural unit, loud uncharacteristic sounds from the muffler are clearly audible. At the same time, a single-axle tractor also produces a lot of smoke and stalls. To be able to fix a malfunction with your own hands, you need, first, to determine its essence.

The most common uniaxial tractor shoots at the muffler due to a number of the following problems:

Excessive 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 with a delay, then this leads to the appearance of atypical shots, which are clearly audible in the area of the muffler. 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. Repairing a walk-behind tractor engine in this case means disassembling the piston group, thoroughly washing and drying the engine cylinder, as well as adjusting the carburetor of the walk-behind tractor.

Repair of all of the above breakdowns does not require special skills and a lot of experience. The most important thing is to act strictly according to the operating instructions for the agricultural unit.

Why is a single axle tractor intermittent??

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;
a uniaxial tractor works in jerks. the reason for this lies in the insufficient warming up of the engine. 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 fully warm up;
The motor of the walk-behind tractor does not noticeably pull, the engine power has decreased. in this case, you need to check and, if necessary, clean the air and fuel filter. Another reason for this breakdown lies in the wear of the magneto ignition system. It is best to replace the part immediately without trying to repair it.

uniaxial tractor starts up and stalls. reasons and repairs

Repair of walk-behind tractors in case they start up and, after a few seconds, stall, you must start by looking for the main causes of this malfunction. To do this, you need to inspect:

Candles, wires and electrodes. in most cases, the unit starts up and immediately stalls due to too large a gap between the electrodes of the ignition system, poor contact between the wires, as well as a dirty spark plug. Repair should begin with cleaning the spark plug. 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 intake. If you have been using low-quality gasoline and have added too much engine oil to it, 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 a single-axle tractor is not picking up speed, then this often indicates a lack of fuel necessary for the engine to function 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 patch up the defect, and if it was not possible to do this, you will need to completely replace the tank of the walk-behind tractor.

The engine of the walk-behind tractor does not start well when hot

The question of why the motor of the walk-behind tractor stalls when heated is quite simple to solve. The whole essence of the problem lies in the excess 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, the temperature of the carburetor becomes much lower than that of the engine of the unit. This problem is observed only during the operation of the walk-behind tractor. When its engine is turned off, the carburetor, on the contrary, lends itself to heating from the side of the hot walls of the engine.

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To fix this problem, it is necessary to act in a certain algorithm every time the walk-behind tractor is started “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 pull the gas trigger over and over again, otherwise this 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 flooding of the engine;
After several attempts to start with the gas trigger half pressed, you will start the engine of the walk-behind tractor, after which you will need to gas it 2-3 times and continue working.

Sources:

Articles muffler, start, tractor, uniaxial