Do-it-yourself mower repair. How to Repair a Benzocosa

DIY mower repair. How to repair a brushcutter if the engine does not start

In this case, check whether there is fuel in the tank. Be sure to use only high-quality A-92 gasoline for your device so that it does not break and lasts for a long time. You can buy fuel at any gas station. For example, in the same place where you refuel your car. If you save and purchase cheap fuel, the cylinder-piston group may be broken as a result, and its repair is very expensive for owners of mowers! It can make up a third of the total price of the unit. It is also very important that the mixture of oil and gasoline is properly prepared. In the manual of the unit, the proportions in which this mixture should be prepared must be indicated. Do not prepare fuel mixture in too large volumes. The thing is that if you store it in this form for a long time, it will lose most of its properties. Therefore, pour fresh mixtures into the brushcutter.

Repair of mowers may be necessary if the fuel filter is dirty, making the engine difficult to operate. If you encounter a startup problem, check the condition of the fuel filter. If necessary, it should be replaced. The inlet pipes must never be without a fuel filter!

The air filter must also be checked. If it is too dirty, it must be removed, washed with fuel and installed again. If you are at home or at your own cottage, this filter, of course, is washed with water, you can even use detergents. Next, the filter must be rinsed well, squeezed and dried. When it has dried, moisten it with a little oil that you use to prepare the fuel mixture. If you put too much oil, it’s okay, you can remove the excess by squeezing the filter thoroughly with your hands, as if to squeeze. The removed cover must be replaced and secured.

The engine may not start if all of the above methods are tested and done. In this case, it is worth adjusting the idle speed while tightening the carburetor screw. AT

And so, we will tell you about the ways to start the device, if you already need to do the work!

1. Carburetor repair. Lay the device on one of the sides so that the air filter faces up. If this is the position of the unit, the mixture falls into the carburetor (or rather its bottom). Before starting the engine, you should remove the air filter, and then literally pour a little mixture into the carburetor, and then install the parts back. In this case, the engine will start literally very quickly.

2. If the 1st option still does not work, then the essence of the breakdown is in the candles. They should be checked by unscrewing how efficient they are. Dry the combustion chamber thoroughly. A candle that does not show any sign of performance should be replaced.

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3. This method is also possible. It is necessary to close the air damper and pull the handle once. After that, open the shutter and pull the starter a couple of times. So it is necessary to repeat up to 5 times.

Some people pull the handle so hard, as a result, it is necessary to repair the brushcutter starter.

The household plot will not have a neat appearance if bushes have grown in its garden and park zone and the grass has formed a dense cover. This indicates the neglect of the site by the owner, who does nothing even to mow the lawns. But the mowing of grass. the easiest job on the site, because for this work a different technique has been created.

Repair of a bar of a Lawn Mower. Primary diagnosis of the trimmer.

The proper operation of the engine and the brushcutter as a whole is influenced by a huge number of factors that are usually related. If you are unable to determine the malfunction, contact a trusted service center.

I would like to note that before proceeding with disassembly and serious repair, you should check basic supplies. These "little things" often affect the work and, perhaps, repairing the trimmer will cost, so to speak, "little blood."

Spark plug. no carbon deposits, electrode gap (0.5-0.6 mm. or as per instructions), good spark

Fuel filter. no pollution, mechanical damage, good throughput. Periodic replacement according to the maintenance schedule in the operating instructions

Air filter. no sawdust or dirt. Periodic cleaning in soapy water and high pressure purging. Replacing the air element according to the operating instructions

Let’s get acquainted with other possible malfunctions:

1. Air leaks into the engine

It is worth noting that many owners confuse air leaks with carburetor malfunctions. Symptoms of air suction in the engine. a strong overspeed, both short-term and constant. Or the scythe simply refuses to start.

The main causes of air leaks on the Chinese trimmer:

  • allows crankshaft oil seal (12227mm small). from starter side
  • misses crankshaft oil seal (15307mm large). from the flywheel
  • carburetor gasket wear
  • crack on carburetor adapter

Actually, it is possible to understand what exactly from this list caused air leaks on a gas mower only by a detailed inspection. To unscrew, remove and suffer in any case, so then in order.

Replacing oil seals of the Chinese trimmer.

One of the main reasons for air leakage into the engine are crankshaft oil seals. In general, this problem is the most common on Chinese trimmers and, in some cases, oil seals begin to pass air in the first year of service. The blame for the poor-quality rubber products of such mowers, well, and no one canceled the natural wear and tear.

Video: Do-it-yourself mower repair. How to Repair a Benzocosa


Do-it-yourself mower repair. How to Repair a Benzocosa

Glands of different sizes are installed on both sides of the crankshaft (12227mm small and 15307mm large). On oil seals, you can safely sin if he begins to "snotty." Another indicator of their malfunction is floating speed when working on a “hot” one. Next, we consider in detail the replacement process.

Replacing the seal of the Chinese trimmer on the starter side:

We unscrew the spark plug, block the movement of the piston with a stopper. Remove the starter (p.31). Turn off the starter ratchet with a 13mm head (p. 35). Traces of the gas mixture on the oil seal indicate its necessary replacement. Using a thin flat-head screwdriver (with an awl, or any similar object that is at hand), we remove the old oil seal (item 36), pry it with a screwdriver on the crankshaft side and remove it.

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Before installation, apply a small amount of oil to the inner surface of the new oil seal (you can use the oil that we use to prepare the gas mixture)

We purge and degrease the seat under the oil seal, evenly install a new oil seal.

Replacing the gasoline trimmer gland on the flywheel side:

We unscrew the spark plug, block the movement of the piston with a stopper.

For convenience, remove the crankcase cover (p. 58) by unscrewing 4 screws (p. 61)

Unscrew the 2 screws securing the clutch (p. 57) with the washers (p. 56), remove the clutch assembly and the washers under it (p. 53)

Unscrew the flywheel nut (p. 52) (p. 51), but not to the end. Not a strong blow to the nut "knock it off the crankshaft." Unscrew the nut, remove the flywheel and key. We examine the surface of the gland. traces of moisture, or wet contamination, scuffs and other damage on it are a signal to replace it.

With a thin flat screwdriver (with an awl, or with any similar object that is at hand), we remove the old oil seal (item 50), pry it with a screwdriver on the crankshaft side and remove it.

Before installation, apply a small amount of oil to the inner surface of the new oil seal (you can use the oil that we use to prepare the gas mixture).

Replacing gaskets and carburetor adapter on the Chinese trimmer:

Another cause of air leakage may be the carburetor adapter.

Motor-scythe device. Gas trimmer device

Numerous models of hand-held motokos available on the market today differ in power (and, as a consequence of this, in their capabilities), weight, and the presence of certain additional functions that increase usability, but the circuit diagram of the tool remains unchanged.

An internal combustion engine is used as a power drive in any gas trimmer. By means of a rigid or flexible shaft, rotation from it is transmitted to the cutting element. a coil with cord (fishing line) or a special knife. The shaft is located inside a metal rod, at one end of which the engine and the fuel tank are fixed, at the other is a cutting head.

A handle is mounted in the middle of the bar. Most often it is on it that the keys, buttons and switches are placed, with the help of which the operation of the trimmer is controlled.

The layout of the controls may vary slightly depending on the model of the tool, but as a rule, this includes a button to turn off the engine, a throttle button that allows you to control the throttle of the carburetor, and a stopper of this button when pressed, making it easier to control for large volumes of work.

1. The gearbox.
2. Trimmer head.
3. Protective cover.
4. Throttle lock button.
5. The switch.

6. The gas lever.
7. The handle.
8. Gas lever lock.
9. The barbell.
10. Loop for attaching a carabiner belt.

11. The air filter.
12. Spark plug.
13. The engine housing.
14. The exhaust manifold.
15. The gas tank.
16. Starter.

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Repair Chinese Lawn Mower. Design of the brushcutter

The trimmer consists of three parts: a gasoline engine, a rod with a shaft inside and a cutting element. Torque is transmitted through the shaft from the motor to the cutting head. In trimmers with a curved rod, the role of the shaft is played by a cable. The rod itself is attached to the gearbox of a gasoline engine. There is engine control on the bar, a belt can also be attached, for convenient use of the trimmer. A cutting element in a petrol mower uses fishing line wound on a trimmer head or a special knife used to trim large weeds.

The main and most complex unit in the trimmer is the engine. In domestic and semi-professional motor-scythes, two types of engines are used. 2 or 4-stroke. Depending on the type of gasoline engine, its refueling and maintenance are different.

  • 2-stroke engines do not have their own lubrication system, so they do not work on pure gasoline, but on a mixture of gasoline and oil. The latter, entering the ignition chamber, lubricates the moving components of the engine.
  • 4-stroke engines are lubricated with oil in the crankcase. They work on pure gasoline without impurities.

Do-it-yourself repair and maintenance of the trimmer can be done without outside help. If replacement of motor spare parts or its adjustment is required, then it is necessary to contact a repair shop.

First launch at the beginning of the season

In late spring, when the active use of gas mowers begins, before starting work, you need to do an inspection and a test for the performance of your tool. Be sure to lubricate the rotating parts, inspect and, if necessary, replace the cutting elements (knife or fishing line). Check for fuel mixture in the tank. If you drained fuel at the end of the previous season, do not forget to pump fuel into the engine using a suction (if it is in the engine).

If this is your first time using a trimmer, be sure to read the instruction manual. Such an instruction should be attached to each brushcutter.

Starting most two-stroke engines is quite simple. Use the procedure described in your trimmer instructions if it differs from the following:

  1. Move the choke lever to the open position. Position the trimmer on its side so that the air filter is on top.
  2. Hold or lock the throttle in the on position (the throttle must be held until the engine warms up).
  3. If the device has an on / off switch, move it to the on position (usually indicated by “I” rather than “O”).
  4. Make sharp, quick jerks with the starter handle until you hear the engine try to start. This should occur between 1-6 jerks, but no more.
  5. Close the throttle halfway and restart the starter. The engine should start after 2-6 additional jerks. If not, move the throttle lever to the full position and pull the starter handle again. Return the lever to half the throttle and pull another 3 times.
  6. After starting the engine, keep the start button pressed and let it warm up for 10 seconds, then turn off the start system.
  7. When the brushcutter warms up, it must restart with the throttle in the closed position.