How is a piston on a trimmer for grass an arrow. How to install a piston on a trimmer for grass

What will happen if the piston is incorrectly on a trimmer for grass

Trammers for grass should be repaired as soon as possible when the first signs of damage appear so that minor malfunctions do not lead to more serious problems. All models are characterized by the presence of such models The main nodes and structural elements: drive system (engine), transmission, working part (knife or cable), belts and handles. Damage can occur in any part, but some nodes fail much more often than others.

Gasoline or electric braids for grass (as well as different models from different manufacturers) differ in design and nature of faults. Some of them can be easily removed with your own hands, while others require major repairs or contact the service center.

The main malfunctions of gasoline trimmers

The most common are black cutters associated with the following constructive elements:

• engine (in particular, with a piston system);
• carburetor;
• barbell;
• starter (a cliff of the rope, cliff or exit from the gearing of the spring);
• with the ignition or fuel supply system;
• T Roothered mechanism (gearbox);
• Filters and muffler.
• the appearance of motorcycles with uncharacteristic sounds;
• does not turn on, does not gain the desired speed and does not stop;
• When the engine is running, the workpiece does not rotate and does not slip;
• gasoline leak;
• overheating of individual units.

Small breakdowns that can be detected without any special diagnosis can also occur:

Dismantling of gasoline braids for grass, lubrication of its parts and replacing faulty elements

In order to disassemble the bush for repair work, you usually need the following devices:

• set of screwdrivers (with different tips) and wretched keys;
• a small puller for removing bearings;
• special candle key;
• a hammer.

In each case, you will need to disassemble individual nodes.

It should be borne in mind that the starter (launcher) in some models is inseparable. In this case, only the element can replace problems with it. If the node is disassembled, it can be repaired by removing and replacing the cable and the spring, or by installing the node (when it is disconnected).

Dismantling and replacing the connecting rod

Often you have to repair a trimmer for the grass of the bar. This is the design of the following parts:

• a steel drive shaft having multifaceted or square slots on the upper and lower ends;
• aluminum pipes;
• plastic sleeve designed to support the centralized position of the drive shaft in the pipe (so that it does not vibrate);
• rubber shock absorber required to connect the traction to the engine;
• The steering wheel with a handle is used for steering, and stand, belt.

On some models, a shock absorber is installed between the steering rack and the arrow. All controls (lock lever, ignition switch, gas button) are located on the handle.

The conical gearbox is connected to the lower end of the bar, but some light models are available without it. This is due to the fact that the rod has a curved shape, and a flexible cable is a rod.

How to disassemble the stem and then assemble it to grease the shaft or replace it, is explained in detail in the video below. In the same way, replace the joint with a new.

Когда это появляется стучать по телефону, Разберите шток и проверьте состояние втулки, и при необходимости замените. How to assemble a thrummer’s thrommer thrummer stick is explained in the video below.

If the rod is not damaged, suitable for installation, then you can tighten the damage site with a clamp or apply a tire. This event is temporary, so replace it as soon as possible.

Clutch repair

When a blade or fishing rod almost constantly rotates, when the engine is idling, and uncharacteristic sounds come from the front of the engine, this indicates a clutch breakdown. Cause. Spring explosion. In this case, the equipment mows normally.

If there is sliding, the pads also wear out.

The coupling of a trimmer for the grass is repaired as follows:

• Remove the muffler cover;
• remove the metal stand;
• After removing the cylinder and the starter cover, gain access to clutch;
• unscrew the side screws to remove the cover of the damper;
• Remove the phone from it by lowering the tight bolts;
• spin the clutch (shown in the photo below);

• Inspect the condition of springs, pads and bearings;
• They catch a new spring, clogging holes;
• To replace the pads, remove the spring, and then unscrew the bolts.

Repair of a gasoline engine, carburetor and gearbox

Problems with the engine can be caused by problems with the piston system, cuffs, rings. You must remove them to remove the drive engine.

It is not easy to determine what caused the breakdown. If there is a guarantee, the mechanism must be delivered to the service center for diagnosis and repair. If it is not possible to consult with a specialist, it should be noted that the most common replacement of piston rings. To do this, disassemble the engine, take out the piston. Do this in the following order:

• Remove the plastic cover of the case by unscrewing the screws or squeezing the clamps;
• Disconnect the crankshaft bar;
• Remove the cylinder head;
• Remove the piston and rings;
• replace them if necessary;
• back.

The rings should be neatly installed, as they are rather fragile.

How the piston is placed and that the oil seal is replaced during engine repair, this is clearly shown on the video below:

With regular use, brushes can be broken by transmission. He wears gears, bearings (they can also break). So that this does not happen often, regularly lubricate the device. The frequency is almost always indicated in the instructions for the operation of the used model (at least once a season). The clip below can serve as a repair instructions.

to the lubricant gearbox, unscrew the plug and simply squeeze the lubricant node by turning the shaft.

You can only remove and clean the carburetor yourself and replace the gasket between the carburetor and the engine. The tightness of the node at home is quite problematic to determine. The main thing. correctly repair equipment after repair so that the trimmer for the grass works without problems.

General malfunctions of an electric trimmer for grass

Electric trimmers for grass differ from gasoline devices with a simpler design. The usual electric strip is divided into mechanical and electric parts. Respectively, the same groups of problems that arise with this equipment are allocated.

Most of the breakdowns cannot be found visually. To do this, you need to use different devices. Visually, you can determine the following:

• the integrity of the power cable has been broken (isolation is torn or it is clearly damaged);
• falling or jamming the start button;
• mechanical external damage to the bush cutter;
• problems with the cutting part;
• Stop braid for grass when etching;
• Damage to the fork.

To find out which part has broken in other cases, you need to disassemble the isolet and sequentially check the most likely options. In this case, pay attention to the external manifestations of deviations from the normal operation of the device. They help to establish the cause.

The following tools and tools are necessary for repairing an electric trimmer for grass:

Electric braids often do not work for reasons that are not directly related to them, but are caused by a decrease in the network voltage or a faulty electric outlet.

How to disassemble and fix the isolet yourself

Before disassembling and repairing the wiring, it is necessary to check the condition of the outlet and the voltage in the network. If its value differs from the specifications specified in the operating instructions, you should not even try to use the device without a stabilizer, is designed for appropriate power. Otherwise, the engine may work incorrectly. As soon as you determined that the reason for the trimmer for grass is directly related to it, you can proceed to the analysis of the mechanism for repair.

Dismantling and repair of electric parts

Dismantling of island for repairing its electric part is carried out in the next sequence.

• Place a trimmer for grass on a flat surface (for example, a table) that does not contain unnecessary objects.
• Remove the screws on the lid on one side.
• Remove the unscrewed half of the case, getting access to the start button, engine, brush, bearings, electrical connections (these elements are shown in the photo below).

The compositions of brushes and bearings are shown in the photo below.

A braid for grass will work without a thermal relay, only constantly check the engine temperature independently, periodically allowing it to cool. You can also install a new similar sensor.

The engine start button can be checked by a short circuit of the jumper of its contacts. If a trimmer for grass works, then the problem is clear. But this option is dangerous. Caution should be taken to avoid electric shock. To replace the button, use the screwdriver to remove it from the seat, and connect the wiring from the old to the new. After replacement, it is necessary to assemble the isolet and inspect it.

Brush replacement is necessary if they collapsed. At the same time, remove the old from the grooves and replace the new.

The connecting terminals on different models of the trimmer for the grass are almost identical, so the wired connections are the same.

Replacing bearings is a rather complicated operation, because it may stick and not get off the engine shaft. Tighten or solve it carefully so as not to damage the rotor or seat.

When the trimmer engine for the grass has failed and it must be replaced with a new one, carefully remove the fan and bearings, and then install them in the same place. From the point of view of costs, replacement is almost comparable to buying a new mechanism. In the absence of experience in working with motors, it is best to entrust its implementation to specialists.

Installation of island

Instructions for installing the electric part of the bush cutter are as follows:

• install the engine by tightening the fasteners;
• connect an electric circuit;
• Gently lay the wires between the individual compartments in existing recesses;
• Close the top cover, fixing the locks and screwing them into place.

There are many possible failures of gasoline and electric trimmers. For the device to continue to work for a long time, it should be kept clean in a dry place. An important point of regular preventive measures (for example, lubrication of the gearbox) and following the operating instructions in the operation manual for the device. It is better to buy high.quality equipment from well.known manufacturers.

How to remove a coil from a trimmer for grass and extract a fishing line for a trimmer

Initially, before filling the fishing line for the trimmer to the coil of the trimmer for the grass, it is necessary to extract it from there. Coil or tip is a device that is located inside the braid, bobbin or drum. The heads are of different types (depending on the manufacturers), however, the principle of replacing the fishing line on the coil has the same. First of all, we will figure out how to remove the head from the tool, as well as how to get a drum with a fishing line from it.

It is interesting! The replacement of equipment can be done directly on the tool, but if you do it for the first time, it is still recommended to remove the head, and study the detailed process of winding. After the technology is mastered, you can perform work on replacement on a trimmer of a motorcycle or a gas station.

Instructions on how to promote a hand head on a trimmer, has the following look:

• Turn the instrument with the head to the top, and if necessary, cleanse it from pollution. Take two fingers of one hand by the cover of the cover (on the mowing head), which are located symmetrically to each other. After a light pressed inward, dismantle the protective cover from the drum
• Next, from the rampart of the drum, the coil for the fishing line should be removed. It is planted on a shaft without fasteners, so it is dismantled with one hand
• The main part of the drum is fixed using a screw, which must be twisted with a screwdriver with an appropriate tip or a bat
• To twist it, it is necessary to hold the base of the drum with one hand, and the second to remove the screwdriver against the direction of the clockwise
• After that, you can proceed to dismantle. To do this, you do not need to pull it with all your strength, but slightly shaking it, slowly remove it from the hook with a metal shaft on which the drum is planted
• When installing the installation, the head should be planted in a tetrahedral slot

This process is not difficult, and as you know, it is not necessary to dismantle the entire head if you know how replacement is performed. When dismantling, consider the following nuances:

• It is recommended to remove the head periodically to prevent the corrosion of the threaded connection. If you never unscrew the screw, then if necessary to do it will be difficult and even sometimes impossible
• If the screw has a tetrahedral boring of the head, then for twisting you should select a screwdriver or bit of a suitable size to eliminate the licking of the faces on the head
• When assembling the installation, a threaded seat should be treated with lubricants, for example, solidol or machine oil
• If the edges on the screw are licked, then for its unscruptions you can use special clamping forceps
• There are drums that do not require preliminary disassembly. To dismantle them, you should take up it, and rotate in the opposite direction of the direction of the clockwise

Knowing how to disassemble the drum, you should continue to clarify the process of replacing a trimmer fishing line for grass. Below the video shows a detailed process how to open a trimmer coil for grass and disassemble it.

Piston group of chainsaws

The dimensions of the cylinder piston group are determined primarily by the diameter of the piston made of heat.resistant aluminum alloy. Regardless of the model of the CPH of the chainsaws, it consists of a cylinder, a piston holding a finger and two latches.

In order to increase compression in the working unit and, as a result, increase in power, many manufacturers install two piston rings. The compression rings made of special cast iron, the chainsaws are tightly adjacent to the cylinder, as a result of which the combustion chamber is ensured.

Motos maintenance

For trimmers and electricity with a curved bar, everything is simple. It is only required to change the fishing line for the trimmer. For the served gearboxes, about once every 50 hours or once a year, you need to turn off the screw and add consistent grease. In the lawn mower, everything is reduced mainly to servicing the engine itself. periodic cleaning of the air filter. Usually you just need to remove the filter, blow (sometimes soak with oil) and put in place. About once a year (or with a noticeable reduction in power), you need to check the condition of the fuel filter. It is in the tank, you can get it using a curved wire. Most often after purging the filter can be set back. If there is a sparkle in the muffler, it also needs to be cleaned from time to time.

If the engine works on a mixture of gasoline and oil, after work you need to drain it from the tank, start a braid and wait until the motor develops the rest. Pure gasoline engines do not require fuel drainage.

But the most important thing is cleanliness. Any braid must be cleaned after work. And not only the zone of the cutting tool in which the “porridge” accumulates from the remnants of the grass, but also the ventilation holes of the engine. The gasoline machines are added to this list of cylinder cooling ribs. If you do not clean them, then over time a peculiar “fur coat” increases from a mixture of dust and dried scraps of grass, which sharply worsens the removal of heat. So the neglect of the “hygiene norms” in this case may be fraught with overheating and the failure of the engine. And this, recall, is the most expensive part of the lawn mower, and its repair can fly into such a penny that it is easier to buy a new tool.

Causes of malfunctions of the piston chainsaw

There are many reasons for the failure of the CPG, which are customary to divide into two main categories: natural wear and artificial malfunctions. The first type of malfunctions, as can be seen from the name, belongs to the physical wear of the rubbing parts of the piston group. The second category is more extensive and means:

• strong overheating of the internal combustion engine and, as a result, the appearance of thermal bully on the piston surface;
• bummer of the lower part of the piston (skirt) due to the duration of the chainsaw at maximum speed;
• getting into the combustion chamber of foreign particles and the occurrence of mechanical damage to CPH;
• the bummer of the compression (piston) ring due to severe wear or exceeding the permissible speed of the saw;
• The inconsistency of the recommended portions of gasoline and oil in the preparation of the fuel mixture.

Experts do not recommend disassembling the CPG for no reason. However, if the tool has significantly lost power, a metallic ringing in the internal combustion engine arose or when the starter jerks of the crankshaft does not turn, the piston chainsaw should be diagnosed. First of all, to identify the motor malfunctions, it is necessary to measure the compression in the cylinder. With a significant deviation from the values ​​recommended by the manufacturer, it can be safely argued that there are scratches, production, and darling on the surface of the cylinder or piston. It is the decline in compression that is the basis for the complete disassembly and repair of the piston group of the chainsaw.

For operational diagnosis of CPG for a breakdown of a compression ring of a chainsaw or bully in the cylinder, professionals advise removing the muffler and evaluate their condition through the final window.

Training

So that then you do not have green snot in the wiper that the tuning piston does not climb into the crankcase and you were supposedly deceived here-remove the old piston from the engine and measure the hole for the sleeve with a caliber for the sleeve. If the hole is smaller than the sleeve of the piston, the “meat” of the crankcase allows, the hands grow from where you need it. a round file to help you (only before the boring. disassemble the engine, collect an empty crankcase for bolts, waste the slopes, make sure that the piston enters the crankcase without problems-wash the details from the chips and collect the engine in a new way. Or in extreme cases, cover the crankcase and file with solidol to somehow protect yourself from the hitting of sawdust into the engine.)

The hole for the 162QMK engine sleeve (such engines are on the Chinese crusts better known among the people as a “watering can”) in the drain is 65 mm. Without boring, this crankcase calmly enters the piston 57mm (150ss), 61mm (1700ss) and 62mm (180ss). You will not find 62mm piston on sale during the day with fire, so it was decided to put the usual piston 61mm on this engine.

By the way, for those who are not in the know, a piston with a diameter of 61mm can easily be installed not only on the engine of the watering rod, but also on any other Chinese 150-ok equipped with an engine of the 157qmj series engine. There, if you attach hands, you can stick piston and 62mm, but only if the “meat” of the crankcase allows. Everything is individual, you need to look at the place. In any case, the distance along the studs, which is 61mm piston, which Piston has 62mm. the same.

On the 139QMB series engine from a regular Chinese 80-bit, you can easily install a piston 39mm (45ss), 47mm (72ss), 50mm (84ss)

From left to right: 39mm (45ss), 47mm (72ss), 50mm (84ss)

Usage

If the piston is powered with a signal of red stone, then its wooden head will advance, which will try to push the blocks standing in front (if they are moved and there are no more than 12). The nomination lasts about one and a half beats of the red stone (0.15 seconds) and is accompanied by a sound heard at a distance of 15 blocks from the piston along any axis. At the same time, if there are entities in the way, then if there are no blocks in their way, they will also be moved (and if the movable block is a mucus block, the entities will be thrown back), otherwise the head or block will pass through them; In the case of an essence block, it can be strangled by a block if it is solid.

When the piston is turned off, the head will move back. over, if this is a sticky piston, then the head will try to move with him a block “glued” to it. The effect of sticking occurs only when the head is moved, so the falling blocks after moving will still fall if there is a free space under them; Also, the block, which moved by a sticky piston, can be shifted by another piston without any complications. In addition, if the adhesive piston breaks off before how he is in time push out block, the piston “peers” from the block, which remains in its new place. If the piston has not pushed anything such and the power is still disconnected prematurely, then the block that was destined to pull it behind him will be shifted as usual (though a little faster).

How to put a piston on a scooter correctly

The new piston is equipped with a finger, two locking rings and additional rings. If the scooter is 2 stroke, then the number of additional rings-2. In 4 strokes, 3 rings are almost always installed, one of which is oil. Consider the installation of a piston and rings on the example of a 2-stroke scooter. First, two compression rings are put on the piston, in special grooves. Next, the so-called “finger” is connected by the piston and the crankshaft, the fasteners are considered full after the installation of 2 stop rings on both sides of the finger. The rings should “sit” tightly in the intended holes. Remember: the arrow on the piston should look to the bottom, on the floor. The described “processes” are not complicated if you figure it out. It is best to watch a training video or familiarize yourself with the instructions for the maintenance of a scooter. Then probably there will be no questions like “How to put rings on a piston of a scooter”.

If during the repair the sealing surface of the cylinder unit was not subjected to finishing processing, then thoroughly clean it from the remnants of the gasket. Carefully clean all the threaded holes from dirt, oil and coolant, which may still have there. Carry out all the cleaning work before inserting the pistons into the diameters of the cylinders. Drain all surfaces in the piston with fresh motor oil

Do not forget the piston finger and connecting rod bearing! During installation, pay attention to the direction of the piston (marking for installation on the bottom of the piston, valve s). Clean the inner hole of the cylinder again with a rag and moisten it also with motor oil

Check your stretch tape of the piston ring for damage and dent, eliminate them and, if necessary, change the tool. When installing the piston, pay attention to the fact that the tension tape or the conical mounting sleeve lay smoothly on the sealing surface of the cylinder head,

When installing the piston, there should not be strong pressure. If the piston does not want to slide inside the cylinder, be sure to check the stretch tape of the piston ring. Do not twist the opening place of the tape so that it is in the same place where the butt ends of the rings.

Do not install the pistons in the engine without an mounting tool (risk of injury, risk of ring damage). If the handle of the hammer is used for installation, then only the weight of the hammer itself can act on the bottom of the piston. Never use a hammer to force the piston into the diameter of the cylinder! If the piston rings do not break already during installation, they can still bend, and because of this it is not enough to fulfill their task.

Installation using force harms not only rings, but can also damage the piston

This is important especially for the pistons of gasoline engines. They have a very thin or working belts, and when the ring is hit, I easily break or completely break

Result: power loss and imminent (and expensive) repair.

Avoid dirt and sand fall into the diameter of the cylinder, after the pistons are already built. Put clean fabric on/in holes if necessary to prevent pollution. Especially when work is in a dusty environment and/or outside the room.

Training

So that then you do not have green snot in the wiper that the tuning piston does not climb into the crankcase and you were supposedly deceived here-remove the old piston from the engine and measure the hole for the sleeve with a caliber for the sleeve. If the hole is smaller than the sleeve of the piston, the “meat” of the crankcase allows, the hands grow from where you need it. a round file to help you (only before the boring. disassemble the engine, collect an empty crankcase for bolts, waste the slopes, make sure that the piston enters the crankcase without problems-wash the details from the chips and collect the engine in a new way. Or in extreme cases, cover the crankcase and file with solidol to somehow protect yourself from the hitting of sawdust into the engine.)

The hole for the 162QMK engine sleeve (such engines are on the Chinese crusts better known among the people as a “watering can”) in the drain is 65 mm. Without boring, this crankcase calmly enters the piston 57mm (150ss), 61mm (1700ss) and 62mm (180ss). You will not find 62mm piston on sale during the day with fire, so it was decided to put the usual piston 61mm on this engine.

By the way, for those who are not in the know, a piston with a diameter of 61mm can easily be installed not only on the engine of the watering rod, but also on any other Chinese 150-ok equipped with an engine of the 157qmj series engine. There, if you attach hands, you can stick piston and 62mm, but only if the “meat” of the crankcase allows. Everything is individual, you need to look at the place. In any case, the distance along the studs, which is 61mm piston, which Piston has 62mm. the same.

On the 139QMB series engine from a regular Chinese 80-bit, you can easily install a piston 39mm (45ss), 47mm (72ss), 50mm (84ss)

From left to right: 39mm (45ss), 47mm (72ss), 50mm (84ss)

Training

So that then you do not have green snot in the wiper that the tuning piston does not climb into the crankcase and you were supposedly deceived here-remove the old piston from the engine and measure the hole for the sleeve with a caliber for the sleeve. If the hole is smaller than the sleeve of the piston, the “meat” of the crankcase allows, the hands grow from where you need it. a round file to help you (only before the boring. disassemble the engine, collect an empty crankcase for bolts, waste the slopes, make sure that the piston enters the crankcase without problems-wash the details from the chips and collect the engine in a new way. Or in extreme cases, cover the crankcase and file with solidol to somehow protect yourself from the hitting of sawdust into the engine.)

The hole for the 162QMK engine sleeve (such engines are on the Chinese crusts better known among the people as a “watering can”) in the drain is 65 mm. Without boring, this crankcase calmly enters the piston 57mm (150ss), 61mm (1700ss) and 62mm (180ss). You will not find 62mm piston on sale during the day with fire, so it was decided to put the usual piston 61mm on this engine.

By the way, for those who are not in the know, a piston with a diameter of 61mm can easily be installed not only on the engine of the watering rod, but also on any other Chinese 150-ok equipped with an engine of the 157qmj series engine. There, if you attach hands, you can stick piston and 62mm, but only if the “meat” of the crankcase allows. Everything is individual, you need to look at the place. In any case, the distance along the studs, which is 61mm piston, which Piston has 62mm. the same.

On the 139QMB series engine from a regular Chinese 80-bit, you can easily install a piston 39mm (45ss), 47mm (72ss), 50mm (84ss)

From left to right: 39mm (45ss), 47mm (72ss), 50mm (84ss)

Description of the piston group of the chainsaw of Stihl 180

On the chainsaw of the Stihl 180, the piston group has a diameter of 38 mm. The dimension of the CPH of the chainsaw is determined by the diameter of the piston, the cylinder is slightly larger. In the standard configuration of the CPG MS 180, it is supplied with the piston finger, two piston rings and two stopping.

The inner surface of the cylinder should be perfectly polished and have a glossy shine, which you need to pay attention to when buying a spare CPG for the Stihl MS chainsaw. If there is damage on the inside of the cylinder, it is not necessary to install such a cylinder. A distinctive feature of the CPG on STIHL MS 180 is that it has two compression rings, while almost all its main competitors have only one

As the manufacturer assures, installing a pair of rings, allows you to better stabilize the piston in operation, strengthen its cooling and increase the compression in the engine, due to which the launch improves

A distinctive feature of the CPG on STIHL MS 180 is that it has two compression rings, while almost all its main competitors have only one. As the manufacturer assures, installing a pair of rings, allows you to better stabilize the piston in operation, strengthen its cooling and increase the compression in the engine, due to which the launch improves.

How to install rings on a two.stroke scooter piston

There is nothing complicated in installing the rings on the piston of a two.stroke scooter, however, and many people know this. How to install a piston on a lawn mower properly. How. But most scooterists who have only recently acquired such a technique do not even have an idea of ​​how to replace the piston on the scooter, how to correctly install rings with a piston where the arrow should look at the piston and much more. Replaced the seals on the crankshaft and now I do not know how to do it, I bought a Foresta 1 chainsaw 1.7. In this lesson, I will tell you how to put the rings on the piston correctly and collect the piston in place. Since we have already talked about four.stroke engines before, here we will only talk about two.stroke engines.So, our piston has worn out and requires replacement.

Although many simply pour gasoline first in the tank, and then the oil and slightly shake the mower, we will do everything right for the new unit. To prepare the fuel mixture for the Fubag lawn mower, 92nd gasoline and a special motor semi-synthetic oil intended for 2-stroke air cooled engines are used.

Please note that oil for engines with water-cooled (boat engines) and oil for 4 stroke engines are not suitable here-a carcass on a candle is formed from them, the exhaust hole is clogged and the piston is damaged. For our engines, we recommend a semi.synthetic oil Fubag 2T Extra. an optimally selected quality composition

The recommended proportional oil ratio to the fuel mixture 1:40, that is, for 1 liter of gasoline, you need approximately 25 grams of oil, this can just be the volume of a standard cap from the tank with oil. In the case of the fuel mixture, oil, the porridge can be ruined, t.to. the excess does not increase the smoke of the mixture during operation, and therefore soil.

Do not add oil. is also not good, t.to. The lack of lubrication critically affects the resource of 2-stroke engines.

Before seasoning the fubag benzotrimmer. This mixture must be mixed thoroughly in a separate canister, only then pour into a gas tank. The quality of the preparation of the mixture directly affects the resource of the engine of the gasoline trimmer for the grass. Therefore, do not use the fuel mixture cooked more than two weeks ago. This can lead to premature breakdown of the unit.

Pour the mixture into the gas tank, it is advisable to fill it with no more than 80%.

On our trimmer, the tank is translucent, which makes it possible to track the amount of the mixture by eye. it is very comfortable!

By the way, there is a memo on the fuel tank. so you will not forget.

Expert Council: In no case should you store gasoline in plastic containers from under water. When mixing the fuel mixture, a static charge accumulates and you can “catch” the spark.

Assembly of braids for grass

So, first you need to properly assemble the lawn mower. It is very simple.

1) Combine the bar and the engine. To do this, align the bar with respect to the engine so that the spindle is located in the same plane with the fuel tank of the engine.

2) install the bar flange in the engine and fix it with 4 screws.

To do this, unscrew the screw “lamb” on the top cover of fasteners. And remove the top cover. Next, insert the handle into the fasteners, set the lid, tighten the screw. We put the control handle on the pipe and fix the screw. On this trimmer, the adjusting screw allows you to configure the handle for the user: you just need to loosen the “lamb” and move to the required distance, and then fix it.

We connect the triss of the throttle to the engine and insert its end into the hinges of the throttle. We connect the red wire of the control handle to the red wire of the engine, and black to black.

How is a good trimmer for the grass differs from bad?

Basic difference: assembly level and manufacturability. To do this, disassemble the engine. In the figure we see that there is a mesh on the mirror of the engine cylinder. The mirror is treated with finish. We see a grid of small grooves that delay oil, which creates ideal conditions for lubricating the piston and removal of excess heat.

The cylinder mirror is chrome. this application strengthens the surface layer of the cylinder mirror made of porous chromium, which gives an increase in wear resistance and resource, reduces friction and increases the specific power of the engine. Therefore, this particular engine will last a long time even with intensive load.

The algorithm for determining the malfunction

The reason for the refusal of the saw or the deterioration of its performance may be:

• a clogged battleship cover;
• Air sucker with a carburetor due to the destruction of the gasket or weakening of threaded fasteners;
• Mechanical sequel of removable saw equipment and other minor defects.

Before starting disassembly, you should verify the need for a more volumetric repair.

Independently assemble a new chainsaw after repair with initial quality, most likely it will not be possible. In the design of modern chainsaws, press plantings of conjugated parts are often used, which have minimal maintainability.

Even a partial analysis of a chainsaw with an improvised tool can lead to undesirable consequences. In most cases, to eliminate a malfunction, you can limit yourself to the dismantling of a separate node or system.

Why are the motor details break?

Breakage can be planned and emergency. The scheduled failure depends on the manufacturer, the materials of the manufacture of the group, the intensity of operation. Usually calculate the saw resource in the motorcycles. After working out the required number of motorcycles, you should hand over the tool for repair for engine prevention.

Each launch of the tool is a certain stress for the piston and cylinder. Therefore, the resource of the device also depends on the number of launches. If you notice extraneous sounds from the motor, reduction of power, increase in consumption, it is time to give equipment for preventive repairs to the service center.

Boats and motors in questions and answers

The arrow on the piston looks towards the exhaust window of a particular cylinder

on a special high.temperature, smeared with a thin layer

Installation of a timing chain tensioner

If you have a 157QMJ series engine. we do the following: we turn the plug on the tensioner body; We insert a thin flat screwdriver into it and begin to tighten the bolt until the tensioner rod does not go inside the case.

Without letting go of the screwdrivers while holding the tensioner housing simultaneously, with free fingers. insert the tensioner into the cylinder, screw it with bolts and only then let the screwdriver and wrap the plug in place.

If you have a 139QMB engine, then we do this: we unscrew the plug from the tensioner case and take out the spring; We push the rods into the housing; Install the tensioner in the cylinder; insert the spring into the housing and wrap the plug.

After installing the piston, do not forget to adjust the heat gaps of the valves and run the engine.

How to replace rings on a scooter cylinder

Sooner or later, the owner of the scooter is faced with wear of piston rings. They can be changed independently. There is nothing complicated in installing the rings on the piston, you just need to know how to do it right. Despite the fact that there are a lot of recommendations on the network, I also decided to join them and tell how I do it.

First, you need to determine where the ring has the bottom and where the top is. At top, this refers to the part facing the piston head. The first way to determine: you need to inspect the ring and find us any letter or digital engraving, for example, Up or N. Engraving is always applied to the top of the ring.

If there is no engraving (this can happen too), you need to act according to the second method. The ring in the section is not flat, but a little curved. If you put the ring so that its outer rim will be slightly higher, and the internal one is slightly lower (as in the picture), then this is the correct location of the ring. That is, the imaginary continuation of the cone should be directed by the top up.

Rings can be of different thicknesses, for example, 1.3 mm and 1.5 mm. Before putting the rings on the cylinder, measure which ring corresponds to which line. It can also happen that you bought rings 1.3 mm and 1.5 mm, and on the cylinder both grooves have a size of 1.3 mm. In this case, a thick ring for installation is unsuitable. You can buy another same set and use a thin ring from it. It does not matter which ring will go up, which is down. there are no differences in the rings.

If you install the rings on the old piston, I recommend cleaning the piston from the carrier before installation.

Now we put on the ring. First we start the antenatal of the ring into the groove near the castle:

It was an example with the upper ring. With the lower, everything is done in the same way, only the upper groove will be an intermediate point. That is, first it is better to put the ring on the upper groove, and then move it down, so less the risk of breaking the ring by inexperience. Sometimes a special spacer ring is put under the lower ring (if it is included). Since it is springy, this ring is easier.

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