10 reasons why a walk-behind tractor engine does not gain speed

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Two-wheeled, mechanical devices of this type, such as a walk-behind tractor or cultivator, are in great demand among farmers, gardeners and cultivators. They minimize human physical labor and help cultivate the soil, remove grass or snow, and transport small loads.

Like any other mechanical unit, a walk-behind tractor can fail and cause a lot of inconvenience to the owner. Careful care of the device and following all operating rules specified in the instructions for use can minimize the likelihood of breakdown. However, no matter how high-quality the walk-behind tractor is, there are parts and elements that become unusable before others. And such an element is the engine.

The walk-behind tractor fails for certain reasons

Why does it stall under load?

“The walk-behind tractor stalled during operation” - you can often hear from the mouths of users of these units. The problem may be a malfunction of the fuel supply system or ignition system.

In the first case, check the spark plug. If it is not wet, it means that fuel liquid does not enter the engine cylinder.

Important! Pay attention to the fuel level. The problem could also be with the fuel valve if it is tight.

In this video you will learn why the walk-behind tractor does not develop power:

In another case, also make sure that the spark plug is working properly. It shouldn't be wet. Otherwise, you will need to adjust the ignition system again. For this:

remove the cover that protects the ignition system;
rotate the flywheel of the power unit until the contacts open;
determine the distance between such elements of the ignition breaker as the anvil and the hammer;
rotate the flywheel until the piston reaches its highest point;
move the flywheel to a position where the clutch engages;
turn the flywheel again in the opposite direction;
fix the distance between the interrupting contact and the cam at 0.33 mm;
securely fasten the cam and return the protective cover to its place.

Now the motor is working again and it will withstand a stable load.

Important! So that, if such situations arise again, we can promptly begin repairs. Otherwise, parts and main mechanisms will wear out and deteriorate much faster.

In addition to the above, other reasons for failure of the ignition system:

muffler contamination;
incorrect carburetor settings;
mechanical defects in the electrical circuit.

Doesn't develop speed

If the engine is in good working order, but the walk-behind tractor does not develop speed, then it is possible:

the air filter is clogged. As a result, not all the air enters the carburetor, and the fuel becomes oversaturated;
low quality fuel fluid;
parts of the ignition system have failed. As mentioned earlier, it is necessary to check the spark plug, correct the gap between the electrodes, and pay attention to the mechanical integrity of the electrical circuit;
if necessary, clean the carburetor and adjust it correctly;
the operation of pistons and cylinders is interconnected with engine power.

Therefore, pay attention to the condition of the pistons and cylinders. Their external damage can significantly reduce the compression value.

For example, cleaning the carburetor may solve the problem

Why does the walk-behind tractor work intermittently?

Among other typical malfunctions of a walk-behind tractor, a number of such breakdowns can also be identified:

The engine of the unit backfires - this indicates the use of low-quality fuel to refuel the unit. In this case, you will have to not only replace the fuel, but also thoroughly rinse the fuel pump and fuel supply hoses;
The walk-behind tractor operates jerkily - the reason for this lies in 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 warm up completely;
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 filters. Another reason for this breakdown lies in the wear of the magneto of the ignition system. It is best to replace the part immediately without attempting to restore it.

Lifan! The engine of the walk-behind tractor does not work, #RepairAfterRepair!

The owner of both gasoline and diesel walk-behind tractors equally often encounters this kind of malfunction. In any case, you must immediately stop working with the machine and repair the breakdown as quickly as possible.

The engine of the walk-behind tractor does not gain momentum. Reason

The walk-behind tractor is one of the popular and irreplaceable household appliances that allows you to perform many tasks efficiently and quickly. But with time

Why does it stall under load?
Reasons why the walk-behind tractor does not gain momentum
Engine power has dropped
Why does the walk-behind tractor work intermittently?
Doesn't develop speed
Malfunctions of different types of walk-behind tractors
The engine runs intermittently and stalls
Unstable idle speed
Why does the walk-behind tractor stall when the air damper is open?
Why does the walk-behind tractor shoot into the muffler?
The main problems of the walk-behind tractor engine
The walk-behind tractor is smoking
The walk-behind tractor starts and stalls: causes and repairs
What to do if engine does not start well when hot?
The starter squeals, the cord comes out
Do-it-yourself walk-behind engine repair, video

Why does the walk-behind tractor shoot into the muffler?

Often, if the engine system malfunctions, the walk-behind tractor not only does not develop speed, but also produces obvious, ear-piercing sounds emanating from the muffler. After this, it smokes and stalls, which clearly causes concern to users.

The cause of this problem may be:

excessive intake of oil into gasoline or diesel, due to which its combustion is accompanied by the release of unnaturally acrid smoke. In this case, the repair consists only of cleaning the fuel system and refueling with high-quality fuel;
failure to adjust the ignition or failure of its components - first of all, pay attention to the gap between the electrodes and, if necessary, set it in accordance with the operating instructions;
incomplete combustion of fuel in the engine cylinder. In this case, repair of the walk-behind tractor engine begins with disassembling the entire cylinder-piston group, which is cleaned and checked for defects. It must be remembered that after such manipulations it will not be superfluous to reconfigure the carburetor.

Malfunctions of different types of walk-behind tractors

Today, many companies produce various types of walk-behind tractors.

Let's look at some of the most popular models and get acquainted with their common problems.

"Belarus-09N" / "MTZ" is a heavy and powerful unit. Most often, its owners have to repair the clutch. Often the gear shift system is also “lame”.
“Ugra” is a Russian motorcycle with a power take-off shaft. It is characterized by a number of design flaws, which cause problems with oil leakage and unpleasant vibrations. You may even encounter a failure of unit control.
Equipment from Chinese manufacturers, for example, the Garden Scout GS 101DE model, often experiences rapid wear of important parts. What makes the situation worse is that the service for Chinese walk-behind tractors is rather poorly developed.

Unstable idle speed

– The gearbox cover gap may be too large. Make a gap of 0.2-0.5

In fact, there are several reasons and it’s not just about low weight, but let’s look at it in order:

1️⃣Velina. A cultivator is a device designed for cultivating prepared or light soil. On virgin soil, where the top layer of soil has been transformed over time into a dense crust of clay, the unit will not be able to work without first cultivating the soil with a plow.

The plow, like a knife, cuts off the dense rhizomes of the top layer and breaks the caked clay.

Most often, such land occurs in areas that have not been cultivated for 2-3 years.

Raise virgin soil with a plow using the unit itself or hire a tractor before cultivating.

Carefully assemble factory cutters according to the instructions. It is important not only the direction of sharpening the knives, but also the strict order of their arrangement.

3️⃣ Weighting of the cultivator. There are walk-behind tractors (Neva MB-2, Oka MB-1, MB-23, etc.), the design feature of which assumes the presence of a center of gravity closer to the steering wheel from the axis of the cutters. In this case, the device will try to jump out of the soil when working with cutters.

READ What kind of oil to pour into the engine of a Stanley walk-behind tractor

Add a small weight to the front of the walk-behind tractor so that the center of gravity is exactly above the cutters. The check is simple. On wheels, the walk-behind tractor should not clearly tip forward or backward.

Weight the unit very carefully. You cannot hang a load of more than 10-15 kg, the gearbox may crack. An example of a light Chinese

Friends, I hope the article was useful to beginners and experienced gardeners. Subscribe and like me, it makes me smile more often!

Adjusting the walk-behind tractor carburetor

Instability of the cylinder block indicates the need for carburetor adjustment. The need to perform this procedure usually arises before the start of the growing season, when the equipment has not been used for a long time, or after it, when the walk-behind tractor has been subjected to significant loads for a long period. The engine must be warmed up before making adjustments. The actual workflow looks like this:

The screws that adjust low and high throttle are fully tightened and then backed out about one and a half turns.
The engine starts and warms up for about 10 minutes.
The lever controlling the power unit must be set to the minimum position, but the engine must not stop.
The throttle control screw will help you adjust the minimum idle speed so that the engine runs stably, without any extraneous noise or stalling.
The rotation of the screws allows you to accurately determine the amount of combustible mixture entering the engine.
Tightening the propeller helps enrich the mixture, and unscrewing it, on the contrary, increases the volume of air entering the engine;

READ What kind of oil to pour into the gearbox of a Stanley walk-behind tractor

Use the idle screw to adjust the maximum idle speed. The same should be done at minimum speed using the screw locking screw. The essence of this adjustment is that the valve screw allows you to adjust the angle at which it is closed;

The lever responsible for controlling the engine must be moved to the “gas” position. If the operation of the walk-behind tractor still cannot be called stable, the full radiation screw is adjusted to achieve an ideal stroke. However, the maximum permissible propeller speed is 2.5.

The accuracy of carburetor adjustment can also be determined by how the spark plug looks after a short period of operation under load. If the working mixture is ideal, the spark plug will not leave soot or traces of fuel, which indicate that the fuel mixture is too lean or, conversely, too rich. It should be noted that carbon deposits or traces of fuel on the spark plug may indicate not only an incorrect setting, but also more serious problems with the walk-behind tractor, including a faulty ignition or cooling system. Adjusting the care of track valves

Why does the walk-behind tractor work intermittently?

Among other typical malfunctions of a walk-behind tractor, a number of such breakdowns can also be identified:

The engine of the unit backfires - this indicates the use of low-quality fuel to refuel the unit. In this case, you will have to not only replace the fuel, but also thoroughly rinse the fuel pump and fuel supply hoses;
The walk-behind tractor operates jerkily - the reason for this lies in 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 warm up completely;
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 filters. Another reason for this breakdown lies in the wear of the magneto of the ignition system. It is best to replace the part immediately without attempting to restore it.

The walk-behind tractor starts and stalls - causes and repairs

Repairing walk-behind tractors if they start and, after a few seconds, stall, must begin by searching for the main causes of this malfunction. To do this you need to inspect:

Plugs, 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. Repairs should begin by cleaning the spark plug. If this does not help, then you need to check the integrity of the wires. If this does not bring the desired result, then you will need to re-adjust 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 motor oil to it, you will need to replace 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 does not gain speed, this often indicates a lack of fuel necessary for the proper operation of the engine. 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 machine. In this case, you need to try to repair the defect, and if this fails, you will need to completely replace the walk-behind tractor tank.

The starter squeals, the cord comes out

– It may squeal if there is a lot of grease on the balls. You need to clean the balls and the places in the ratchet where they are inserted.

The cultivator made several pops, the speed began to “float”

– Most likely, the power system is not coping, or the fuel level in the tank is low, the float axis may be skewed and debris may have gotten under the needle valve, you need to remove everything and check the air filter and jets.

The material will be updated, we are waiting for comments with questions, stories about identifying a particular malfunction and ways to eliminate it. Also, see the answers to questions about a particular walk-behind tractor model on its description page.

Malfunctions of the walk-behind tractor engine during operation

The units and components of motors that are installed on mini-agricultural equipment are subject to significant loads. They can also fail during operation of the unit, which will very quickly lead to serious failures.

If you detect suspicious noises, jerks and disturbances in the operation of the walk-behind tractor systems, it is very important to immediately turn off the engine and then let it cool down - only after that will it be possible to fix the problem.

If during operation the motor begins to gain speed on its own, i.e. is “peddling”, most likely this means that the fastening of the regulator and thrust levers has become loose. In this case, the user will have to readjust the motor control drive.

Sometimes, when the throttle is fully open, the engine does not accelerate when the throttle is pressed, but rather begins to lose power until it comes to a complete stop. This is a clear sign of overheating, so you need to turn off the walk-behind tractor and wait until its components have completely cooled down. After this, you should check the oil level in the crankcase, and also check the cleanliness of the finned surfaces of the blocks and cylinder heads.

Under increased loads on the engine, it may seize. There may be several reasons for this:

there is not enough oil in the crankcase;
a nadir has formed on the lower head of the connecting rod;
The connecting rod or oil sprayer has completely failed.

If the motor of a walk-behind tractor is jammed, you will have to disassemble it and check the condition of the main components and components: faulty, deformed, melted, etc. subject to replacement.

Engine power has dropped

It often happens that a previously serviceable walk-behind tractor, which has served for several years, suddenly loses power.

– If the power has dropped after a long period of storage

, perhaps the walk-behind tractor was stored with a wet carburetor and fuel system, which led to boiling. In this case, you can start the engine and let it run, often after these actions the power is restored. If you have the skills, you can disassemble and clean it; if you don’t have the skills, it’s better to contact the service.

– The carburetor may be clogged

. Clean

– Fuel hose is clogged

. Need to blow it out.

– Possible loss of functionality of the crankcase cuff

. Remove the casing and gearbox cover and inspect the cuff.

– Carbon deposits on the cylinder, muffler

. Clean.

– The air filter is clogged

. Clean.

– No compression

. Change piston rings, cylinder, piston.

Main malfunctions of walk-behind tractors

Diesel and gasoline engines have different motor resources. For the former, the normal figure is 4000 m/h, but the latter are capable of providing only 1500 m/h. Despite this, diesel models of walk-behind tractors are not in high demand. After all, both when purchased and during operation they are much more expensive. Therefore, most likely, you are working with a walk-behind tractor equipped with a gasoline (carburetor) engine.

All breakdowns that may occur during the operation of agricultural mini-equipment can be divided into two categories:

Engine faults:
startup problems;
malfunctions.
Malfunctions of other components and mechanisms:
improper clutch operation;
breakdowns in the gearbox;
problems with the chassis;
control and automation malfunctions;
malfunctions of walk-behind tractor (cooling, lubrication, etc.).

In many ways, the success of repairing a suddenly broken machine depends on the correctness of the diagnosis. As for maintenance, it is carried out precisely in order to identify small faults that will later lead to serious ones.

If you do not have the necessary knowledge, premises, tools and materials necessary to service and repair the motor, entrust the work to a specialist!

Why does the walk-behind tractor shoot into the muffler?

Often, when working with an agricultural implement, 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 a problem with your own hands, you first need to determine its essence.

Most often, a walk-behind tractor shoots into the muffler due to a number of the following problems:

There is an excess of engine oil in the fuel mixture - in this case, you need to drain the remaining fuel, wash the fuel pump and hoses, and fill in new fuel with less oil;
Incorrectly set ignition - if the mechanism works late, this leads to the appearance of atypical shots, which are clearly audible in the muffler area. In such a situation, you should immediately set the correct gap between the electrodes of the walk-behind tractor's ;
Incomplete combustion of fuel in the engine cylinder. Repairing a walk-behind tractor engine in this case involves disassembling the piston group, thoroughly washing and drying the engine cylinder, as well as adjusting the walk-behind tractor carburetor.

Silencer for walk-behind tractor - manufacturing, shoots, flames, video

When a trouble-free walking tractor begins to jerk, the owner is stunned and begins to search for the cause of the problems. The occurrence of such a situation is doubly annoying when work is full and there is no downtime.

Often problems arise with the muffler, which for some reason begins to make strange sounds or even behave suspiciously. The main thing is not to panic, but to fight everything with a cold mind. We'll take a look at some of the most common problems.

The walk-behind tractor shoots into the muffler: what to do?

The owner of such useful and multifunctional equipment should know that interruptions in the operation of the muffler can occur due to:

Thin and low-quality metal;
Frequent blows;
Excessive loads;
Hard work;
Rough lamps.

Often the cause of a muffler is a gap in the process of supplying sparks and spark plugs. To get rid of troubles, you need to unscrew the spark plug, align its body and ground, turning the crankshaft using the existing starting handle.

At the same time, you should pay attention to whether a spark appears. If even after these manipulations the situation does not change, it is advisable to thoroughly clean the spark plug

Flame from the muffler of a walk-behind tractor and black smoke: looking for the cause and solution

Many experts believe that such problems arise due to incomplete combustion in the fuel unit. You can detect an ignition error, the use of an overly rich mixture, a drop in power or overheating.

If, after attempting to start, not only a flame appears, but also black smoke, then we are talking about the use of low quality oil or seriously contaminated injectors. Naturally, it is advisable to buy the best lubricant and thoroughly clean the injectors of all excess.

When the muffler, in addition to these points, also produces serious noise and a person wants to calm down, then it is necessary to increase the weight of the parts, since such problems often arise due to the lightness of the components.

You can see other problems that occur with Neva, Centaur, Garden Scout, etc. mufflers, as well as their solutions, thanks to the video below, where an expert introduces everything and answers frequently asked questions.

How to make a muffler for a walk-behind tractor with your own hands?

If the factory part has failed and cannot be repaired, and there is no money to buy a new one, then the best solution may be a low-noise home muffler for a walk-behind tractor.

What is needed for this?

Visa
Bulgarian;
Impressive power drill;
Adjustable wrench;
Welding machine.

It should be noted that the flange mount is considered the most vulnerable and weak point of the structure, so it is necessary to use material of high strength and thickness. Use the following diagram as a basis for creating a silent muffler in a walk-behind tractor.

To form a flange mount, it is advisable to take a workpiece 12 mm thick. In order for the flange plate to fit tightly, a piece must be made similar to the piece on the engine exhaust pipe.

Then it is important to take care of the expansion chamber. We are talking about thickening with several partitions, which significantly reduce the consumption of gases used and noise

It is important not to overdo it with the number of barriers, otherwise the device will not be able to start the first time.

To do the final part

Exhaust pipe, it is important to take a piece of the same size as the exhaust pipe. The pipe must be strong and reliable

To make sure once again that creating a quiet muffler for a walk-behind tractor is real, you should watch a video in which ordinary people demonstrate the results of their efforts and share their “recipes” for success.

The walk-behind tractor starts and stalls - faults, repairs, video

The “heart” of any gasoline-powered vehicle is the engine . Walk-behind tractors are no exception to this. Their motor part creates a working stroke, power potential, and declared productivity, which together make it possible to perform certain agricultural operations.

But often it is this working node that is the most vulnerable. Low-quality fuel, severe overloads, lack of regular diagnostics and many other reasons cause serious malfunctions, the timely detection and repair of which will determine its further performance. This article will be devoted to what types of breakdowns are most often characteristic of walk-behind tractor engines, and which ones can be diagnosed and fixed at home.

READ How to Make a Cart for a Motoblock

What elements are needed for a homemade muffler for a walk-behind tractor?

It is advisable to carefully examine the broken object before starting the main work in order to avoid repeating the same mistakes and to set the accents.

If the engine on the walk-behind tractor does not pull,!!!

Why does it stall under load?

In most cases, the engine stalls under load due to problems in the fuel supply and ignition system. Fuel system faults can be checked as follows:

The spark plugs are unscrewed for visual inspection. If the working part is too dry, then there is a possibility of insufficient fuel in the system.
If the fuel level in the gas tank is too low, shaking may prevent fuel from entering the engine .
The technical condition of the fuel tap is inspected. In some cases, it may be slightly blocked and the engine stalls due to insufficient fuel supply.

The engine of a walk-behind tractor may stall due to incorrect settings of the ignition system.

Too high humidity on the surface of the spark plug indicates a malfunction of the entire fuel system.

Re-tuning is carried out according to the following algorithm:

The cover is removed, which protects the main parts of the system.
The flywheel rotates until the contacts open.
A special probe is used to check the resulting gap.
The flywheel rotates until the piston is fully compressed. The load is applied until the characteristic sound of the overrunning clutch appears.
The flywheel is turned in the opposite direction until the marks coincide.
The gap from the interrupting contact to the cam is set to 0.3 mm.
The cam position is fixed.

See » Electric cultivator Lux 1400 for earthworks

The above procedure solves the problem of the situation where the engine stalls when a load is applied.

Fuel supply problems

If attempts to start the walk-behind tractor are unsuccessful, this means there is a malfunction in the engine or starting system. In order to determine the source of the breakdown, you first need to check the spark plugs.

If the spark plugs are dry, this means that the fuel mixture is not entering the engine cylinders. There may be several reasons for this:

there is no fuel in the tank;
the fuel supply valve is closed;
the hole in the gas tank plug is clogged;
foreign objects have entered the fuel supply system.

To resolve fuel supply problems, you must:

Fill the tank of the walk-behind tractor.
Open the fuel tap.
Clean the drain hole located in the gas tank cap.
Remove the fuel valve, drain the gasoline from the tank and rinse it with clean gasoline. After this, you should remove the connecting hose located on the carburetor side and blow it out together with the carburetor jets without disassembling the latter using a fuel pump.

If fuel enters the carburetor but does not reach the cylinder, the problem is in the carburetor itself. To eliminate it, this unit must be removed, disassembled and cleaned. Well, after that - assemble and install in place. Therefore, before performing all the necessary manipulations, it will not hurt to refresh your memory of the structure and principle of operation of the carburetor.

Lifan LIFAN smoke engine, causes, heated carburetor

The engine , after repair and adjustment, worked fine for an hour. An hour later he started smoking and 20 minutes later.

— The filter may be clogged. The filter needs to be replaced or cleaned.

— The outlet hole in the gas tank cap may be clogged. Needs cleaning.

- Maybe it's a candle. It is necessary to check the connection of the wires, the engine stop button, remove the spark plug and clean it. Replace if necessary.

Why does the walk-behind tractor stall under load?

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

After this, you need to make sure that there is a sufficient amount of fuel in the fuel tank. If there is gasoline and there is enough of it for work, inspect the fuel valve - it is quite possible that it is in the closed position.

To start the walk-behind tractor, just open the fuel tap and continue working with the unit.

Another reason why the walk-behind tractor starts up and then stalls after 5 minutes of operation is a breakdown of the ignition system. Determining that the unit is faulty for this very reason is quite simple - look at the spark plugs - if they are wet, it means that the fault has appeared in the ignition system of the walk-behind tractor . The best way out of this situation is to re-adjust the unit’s ignition system. All actions must be performed in this order:

Remove the cover that protects the elements of the ignition system;
Turn the motor flywheel until the contacts in the magneto open;
Using a special feeler gauge, measure the gap between the “anvil” and the “hammer” of the walk-behind tractor’s ignition system;
After this, turn the flywheel until the piston of the walk-behind tractor compresses. 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 engaged;
Then turn the flywheel in the opposite direction so that the mark on it coincides with the mark on the walk-behind tractor body;
Set the gap between the interrupting 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 steps, the walk-behind tractor will no longer stall under load. The main thing when similar problems arise in the future is to try to fix the breakdown as quickly as possible, so as not to subject the main mechanisms of the walk-behind tractor to increased wear.

Also, the utility 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 cable, and the engine starts, it means that you will need to add gasoline to the tank.

Why does the walk-behind tractor shoot into the muffler?

Sometimes the operation of equipment is accompanied by unusual sounds from the muffler. The walk-behind tractor smokes and stalls. To eliminate such a malfunction, it is necessary to first determine what caused it.

Such problems may occur in the following cases:

Excess motor oil in fuel. The remaining fuel is drained, the fuel pump and hose system are washed, and new fuel is added;
Incorrectly set ignition. It is necessary to check how correctly the gap between the electrodes is set;
The fuel in the engine cylinder does not burn completely. In this case, it is necessary to disassemble the piston system, thoroughly wash and dry the cylinder, and adjust the carburetor.

In the above cases, it is not difficult to repair walk-behind tractors yourself. It is important to strictly adhere to the algorithm of actions.

Causes of breakdowns

There are a large number of different reasons why a motor fails. Repair of motor cultivators can be carried out at the following points:

In Moscow there are a large number of companies that repair equipment. Services can be expensive, so many people do the work themselves.

Belt replacement

Owners whose motor cultivator Mole MK 1A breaks the belt should replace the damaged belt with a new one as follows:

Remove the walk-behind tractor cover.
Remove the belt from the large wheel.
Loosen the accelerator bolt, which prevents you from removing the belt completely.
We remove the old belt.
The new belt is put on the small pulley, after which the accelerator bolt is tightened.
We put the belt on the large pulley on top of the structure.
Carefully spin the wheel and put on the belt completely.
We install the cultivator casing in place.

Now you know how to replace the belt yourself, and if necessary, you can easily do it yourself.

Now you know the main reasons for the failure of walk-behind tractors from this manufacturer, and how to start a Mole walk-behind cultivator if necessary. This approach is possible due to the simple design of the unit. However, DIY repairs are not for everyone, and if in doubt or uncertainty, do not hesitate to seek help from specially trained people. In most cases, they will make repairs better and faster. If you don't trust others and rely only on your own strength, you will need a little attention and everything will work out. Experienced owners are advised to record all actions when disassembling the unit for the first time, so that, if necessary, they can restore the entire sequence of actions and not get confused during reassembly.

The “heart” of any gasoline-powered vehicle is the engine. Walk-behind tractors are no exception to this. Their motor part creates a working stroke, power potential, and declared productivity, which together make it possible to perform certain agricultural operations.

Why does the walk-behind tractor work intermittently?

Among other typical malfunctions of a walk-behind tractor , a number of such breakdowns can also be identified:

The engine of the unit backfires - this indicates the use of low-quality fuel to refuel the unit. In this case, you will have to not only replace the fuel, but also thoroughly rinse the fuel pump and fuel supply hoses;
The walk-behind tractor operates jerkily - the reason for this lies in 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 warm up completely;
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 filters. Another reason for this breakdown lies in the wear of the magneto of the ignition system. It is best to replace the part immediately without attempting to restore it.

READ Do-It-Yourself Trailer For Motoblock Neva

Why does the walk-behind tractor stall under load?

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

Another reason why the walk-behind tractor starts up and then 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 - look at the spark plugs - if they are wet, it means that the fault has appeared in the ignition system of the walk-behind tractor. The best way out of this situation is to re-adjust the unit’s ignition system. All actions must be performed in this order:

Remove the cover that protects the elements of the ignition system;
Turn the motor flywheel until the contacts in the magneto open;
Using a special feeler gauge, measure the gap between the “anvil” and the “hammer” of the walk-behind tractor’s ignition system;
After this, turn the flywheel until the piston of the walk-behind tractor compresses. 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 engaged;
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 interrupting 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.

Causes of walk-behind tractor malfunctions and ways to eliminate them

Malfunction: walk-behind tractor stalls under load

If the walk-behind tractor operates normally for a few minutes and then stalls, the cause is usually a failure in the fuel supply or problems in the ignition system.

To find out what is the cause of the malfunction of the walk-behind tractor, you must first check how the fuel is supplied:

take out the spark plug and inspect it - if it is dry, it means there is not enough fuel;
check whether there is enough fuel in the gas tank of the walk-behind tractor;
make sure that the fuel tap is open - a closed tap can be a simple reason that the walk-behind tractor stalls.

If the problem is a malfunction of a gasoline walk-behind tractor in the ignition system, it must be re-adjusted as follows:

remove the cover protecting the ignition system;
turn the engine flywheel until the contacts in the magneto open;
using a feeler gauge, measure the distance from the anvil to the hammer;
turn the flywheel until the piston is compressed to maximum;
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 body of the walk-behind tractor;
set the distance from the interrupting contact to the cam to 0.3 mm;
fix the cam with the screw located above the element;
install the cover into the walk-behind tractor body.

If the adjustment is made correctly, the walk-behind tractor will not stall during operation.

Malfunction: the walk-behind tractor operates jerkily, intermittently or at reduced power

If a walk-behind tractor with a gasoline or diesel engine begins to work intermittently, you must immediately turn off the unit and begin troubleshooting.

Continuing to work with a faulty walk-behind tractor means leading it to more serious breakdowns.

What to do:

if the engine of a gasoline walk-behind tractor makes reverse movements, it is necessary to rinse the pump and hoses for supplying fuel and replace the fuel with a higher quality one;
when the walk-behind tractor operates jerkily due to incomplete warming up of the engine, you need to turn off the engine, let it cool completely, start it and warm it up for ten minutes;
if engine power has dropped, you need to check and clean the filter system;
If the ignition magneto wears out, the part must be replaced with a new one.

Malfunction: the walk-behind tractor smokes and stalls, the muffler makes unusual sounds

Possible causes of the malfunction:

too much motor oil in the fuel;
the ignition is set incorrectly;
The fuel in the engine cylinder does not burn completely.

Troubleshooting methods:

if there is excess oil, drain the fuel, flush the fuel pump and hose system, and add new fuel;
check that the gap between the electrodes is set correctly;
if it becomes obvious that the fuel is not completely burned, disassemble the piston system, wash and dry the cylinder, and adjust the carburetor correctly.

Malfunction: the walk-behind tractor starts, but quickly stalls

This 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 reason for the malfunction is that the carburetor is dirty and not enough fuel is supplied. Then you need to replace the fuel and reduce the amount of oil.

Malfunction: the walk-behind tractor stalls when heated

This problem occurs due to excess air entering the carburetor. In case of such a malfunction, the throttle trigger should be squeezed halfway. After starting the engine, you need to give it a good gas before starting work.

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 repairs of gasoline walk-behind tractors using original components, which are always available in our warehouse.

When your hitherto trouble-free walk-behind tractor begins to act up, it is very annoying. It’s doubly annoying when this happens in a situation where there’s a lot of work and without a walk-behind tractor, it’s like without hands. It seems to start normally, but as soon as you give it a load, it immediately sneezes and stalls. What is the reason for such “betrayal”?

The walk-behind tractor starts and stalls - causes and repairs

Repairing walk-behind tractors if they start and, after a few seconds, stall, must begin by searching for the main causes of this malfunction. To do this you need to inspect:

Plugs, 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. Repairs should begin by cleaning the spark plug. If this does not help, then you need to check the integrity of the wires. If this does not bring the desired result, then you will need to re-adjust 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 motor oil to it, you will need to replace 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 does not gain speed, this often indicates a lack of fuel necessary for the proper operation of the engine. 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 machine. In this case, you need to try to repair the defect, and if this fails, you will need to completely replace the walk-behind tractor tank.

Why does the walk-behind tractor shoot into the muffler?

Most often, a walk-behind tractor shoots into the muffler due to a number of the following problems:

There is an excess of engine oil in the fuel mixture - in this case, you need to drain the remaining fuel, wash the fuel pump and hoses, and fill in new fuel with less oil;
Incorrectly set ignition - if the mechanism works late, this leads to the appearance of atypical shots, which are clearly audible in the muffler area. In such a situation, you should immediately set the correct gap between the electrodes of the walk-behind tractor's ;
Incomplete combustion of fuel in the engine cylinder. Repairing a walk-behind tractor engine in this case involves disassembling the piston group, thoroughly washing and drying the engine cylinder, as well as adjusting the walk-behind tractor .

Frequent malfunctions and their causes

The main features of temporary malfunctions of walk-behind tractors of the brands “Neva MB 2” and “Neva MB2K”, in which beginners usually “float”, include the following.

The valve belt is not adjusted correctly and it falls off. Movement back and forth in the walk-behind tractor is carried out using a V-belt. If the drive belt slips, the unit begins to operate incorrectly. You can determine the required length and width by measuring the section from the pulley to the rollers. It is recommended to select the following parameters: width – 0.75 cm, length – 0.65.
The device stalls under high load. Improperly functioning seals can cause failure.

Incorrectly configured carburetor system, the unit will not start. Before performing this procedure, you should always adjust the centrifugal regulator using the included instructions.
The ignition is not set, gears are difficult to engage. The cause of the breakdown may be the lack of a spark, which provokes ignition of the fuel in the internal combustion chamber.
There are faults with the spark plugs, the muffler shoots and smokes, black smoke comes out. It is possible that the unit cannot continue to operate precisely because the spark plugs are faulty; this must be verified.

Walk-behind tractor engine is difficult to start when hot

The question of why the motor of a 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 motor oil, and the second part cools the carburetor. As a result, the carburetor temperature becomes much lower than the temperature of the unit’s engine. This problem is observed only during the operation of the walk-behind tractor. When its engine is turned off, the carburetor, on the contrary, is heated by the hot walls of the engine.

As the carburetor of the walk-behind tractor heats up, the remaining fuel begins to actively evaporate, filling all the voids in the walk-behind tractor, including the air filter and the intake manifold. This leads to the complete disappearance of fuel, which is why the walk-behind tractor will not start when the engine is hot.

To fix this problem, it is necessary to follow a certain algorithm every time you start the walk-behind tractor “hot”. Your main task is to ensure that the mixture combines so that the engine can start. To do this you will need:

When starting a hot engine, squeeze the throttle trigger halfway;
Do not try to press the gas trigger over and over again, otherwise you will only aggravate the situation, since when you press the gas trigger frequently, 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 pressed halfway, you will start the engine of the walk-behind tractor, after which you will need to rev it up 2-3 times and continue working.

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 owners of agricultural implements of the Honda, Agro, Cascade and Neva brands.

Sources:

https://mostech-group.ru/nelzya/pochemu-motoblok-ne-tyanet-frezu/ https://mzoc.ru/selskohozyajstvennaya/pochemu-motoblok-strelyaet-v-glushitel.html https://o-motoblokah .ru/motobloki/remont