Four-stroke gasoline trimmer for grass-a rating of the best models of 4-tact gasoline. Comparison with two.Stroke

The working cycle of a gasoline engine (ICE) is a number of processes, as a result of which a portion of effort (power) affects the crankshaft of the motor is made. The working cycle consists of:

  • Filling the cylinder by fuel consistency;
  • Its compression;
  • Ignition of consistency;
  • Expansion of gases and cleaning from their cylinder.

Tact in ICE is the movement of the piston in one direction (upward or down). For one turn of the crankshaft, two tacts are performed. The one of them, in which the expansion of the bedrooms occurs and the necessary work is performed, is called the piston workshop.

Engines, in which the working cycle is performed in 2 tacts (one revolution of the crankshaft) are called two.Stroke. Engines in which the working cycle is performed in 4 tacts (two crankshaft revolutions) are called four.Stroke. Two- and four-stroke engines can be both gasoline (carburetic) or diesel. What are the main operational and design features of two.Stroke and four.Stroke engines? What is the difference between two.Stroke and four.Stroke? To better understand this, you must familiarize yourself with the principle of their work.

The principle of operation of a four.Stroke gasoline engine

When inlet, the piston is lowered from the upper dead point (VMT) to the lower (NMT). At the same time, with the help of camshaft cams, the inlet valve opens, through which the fuel mixture is sucked into the cylinder.

With the reverse course of the piston (from the NMT to the VMT), the fuel mixture is compressed, accompanied by an increase in its temperature.

Before the very end of the compression between the electrodes of the candle, a spark lights up, setting fire to the fuel mixture, which, burning, forms combustible gases pushing the piston down. There is a working move in which useful work is performed.

stroke, trimmer, grass, gasoline

After the transition of the NMT piston, the exhaust valve opens, allowing the piston moving upwards to push out the spent gases from the cylinder. The release occurs. At the top dead point, the exhaust valve closes, and the cycle is repeated again.

The principle of operation of a two.Stroke gasoline engine

When compressed, the piston moves from the lower dead point to the upper. Two.Stroke or four.Stroke? Which suspension boat engine is better what is two or. After the purge window (2) through which the fuel mixture enters the cylinder first blocks, and then the exhaust (3), through which the exhaust gases come out, the compression of the air-banding mixture begins. At the same time, a vacuum is created in the crank chamber (1), which sucks the next portion of fuel from the carburetor. When the piston approaches the upper dead point, the mixture ignites from the spark of the candle, and the gases formed pushing the piston down, rotating the crankshaft and producing useful work.

In a crooked chamber during the working move, the pressure increases, compressing the fuel mixture that gets there in the previous one. When the upper surface of the piston (its sealing ring) is reached, the latter window opens, the latter opens, releasing gases in the muffler. With further movement, the piston opens the purge window, and the fuel mixture enters the cylinder under pressure in the crooked chamber, displacing the remnants of the exhaust gases (carrying out purge) and filling out the nose space. Which electric trimmer for grass is better for giving? That cut off, two.Stroke or. When the piston crosses the lower dead point, the working cycle is repeated.

2t or 4t? Advantages and disadvantages.

Lecture on the topic of 2 and 4-stroke engines from the point of view of the consumer. Have questions?. Come on to the forum

Testing the ECHO SRM-3020T Trimmer in Thick Brush and Weeds

How to choose a trimmer for grass, buy a trimmer for grass.

Even more information about the repair and choice of tools on our website www.Looktool.Ru, we are happy for everyone.

In a two.Stroke engine, filling and cleaning the cylinder is performed simultaneously with compression and expansion strokes. At a time when the piston is near the lower dead point. To do this, there are two holes in the cylinder walls. Inlet or purge and graduation, through which the fuel mixture is made and the production of waste gas is produced. There is no gas distribution mechanism with valves in a two.Stroke engine, which makes it much easier and easier.

Little power. Unlike a four.Stroke engine, in which one working stroke falls on two crankshaft revolutions, in a two.Stroke working move is performed at each turnover of the crankshaft. This means that the 2-stroke engine should have (theoretically) twice as large liter power (the ratio of power to the engine is lit) than the 4-stroke. In practice, however, the excess is only 1.5-1.8 times. This is due to the incomplete use of the piston during expansion, the worst mechanism of the release of the cylinder from the exhaust gases, the expenses of part of the power on purge and other phenomena associated with the features of the gas exchange of 2 strokes.

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Fuel consumption. Exceeding the four.Stroke engine in liter and specific power, the two.Stroke engine is inferior to it in efficiency. The displacement of the exhaust gases is carried out in it by the air-fuel mixture entering the cylinder from a curvature chamber. At the same time, part of the fuel mixture falls into the exhaust channels, moving away with the exhaust gases and not performing useful work.

Lubrication. Lawn mower or electric coser, which is better to choose? Trimmer for grass is better to purchase in the store. Two.Stroke and four.Stroke engines have a different engine lubrication principle. In 2 stroke models, it is carried out by mixing in certain proportions (usually 1: 25-1: 50) of motor oil with gasoline. Air-oiling mixture, circulating in crooked and piston chambers, lubricates the bearings of the connecting rod and crankshaft, as well as the cylinder mirror. Trimmer for grass is four.Stroke or two.Stroke ”about Moto when fuel mixture fire, the oil existing in the form of the smallest drops burns together with gasoline. Its combustion products are removed along with spent gases.

How to choose a gasoline trimmer for grass for grass

Gasoline trimmers for grass surpass electric models:

  • Higher power;
  • An unlimited radius of action. There is no binding to the network outlet;
  • Lack of wires dangling underfoot;
  • The ability to work in the rain or on wet from dew grass.

Why is a gasoline trimmer for grass for grass more productive than electric? You can mow the grass continuously until the gasoline in the tank ends. And after half an hour work, an electric trimmer should be given a respite to cool the motor.

But gasoline trimmers for grass also have disadvantages:

stroke, trimmer, grass, gasoline

The power of gasoline trimmers is measured in horsepower (l. With.).

Household apparatuses up to 1-1.5 l. With. Suitable for simple work-mowing low grass on the lawn or flower beds with a total area of ​​up to 10-15 acres. They weigh no more than 4-5 kg ​​and do not require supporting belts.

Semi-professional trimmers for grass with an engine of 1.5-2.5 liters. With. They are also called farmers. They are designed for an area of ​​up to 30 acres and will cope with increased loads.

Garden-park trimmers for grass is a professional technique used by utilities. The equipment operates on engines with a capacity of above 2.5 liters. With. And withstands daily many hours.

In gasoline trimmers, the volume of the tank with fuel is 1-1.5 liters. It is difficult to control the tool with an engine and a heavy tank, holding it by weight. The load from the shoulder part will help remove the belt system, which will evenly distribute the load on the entire spine.

For regular care for the garden and the house territory, the Patriot PT 3555ES Country model is suitable. Trimmer for the grass received an enhanced design due to a whole.Metal forged shaft. The working head has a universal mount. Depending on the structure of the grass, you can replace the fishing line for a trimmer with a four.Blade knife that goes to the kit.

To mow high grass and weeds in large areas of up to 30 acres, you will need a gasoline trimmer for grass with an engine of 1.5-2 liters. With.

Example a.

Conditions: It is necessary to regularly trim the lawn on a section of 4 acres with many paths of flower beds and decorative plants, fruitful bushes. The operation of the operator with an internal combustion engine due to allergies to exhaust gases is excluded.

Solution: Due to the restrictions on the operator to work with the internal combustion engine, we select a suitable unit from electric trimmers.

Despite a decent area of ​​4 acres, we will not overpay for unnecessary engine watt power. We will push ourselves in our choice from the type of vegetation: we know that the lawn needs to be regularly trimmed, therefore, the trimmer for the grass will not encounter either thick weeds or high grass.

That is, we have at our disposal a well-groomed vegetation cover with a maximum grass height of 6-9 cm, without weeds or weeds. There are hard.To.Reach places under the bushes, between flower beds. It is required to maintain a state of well.Groomed, trimming the overgrown grass.

With such work, it is excellent to cope with an electric trimmer for grass with a power of up to 0.6 kwatt. Choose a model with a telescopic bar for working with different operators. With different dimensions (men and women), and for comfortable processing of the lawn under the bushes.

“D”. A figurative handle is also great for this type of work. Given the area of ​​the site, (4 acres) will need at least 30 minutes to complete the work. The weight of such a model will not exceed 4-5 kg. For yourself. Evaluate how tedious it is to work 30 minutes with 4 kg in your hands and make a decision to buy a suspension with a single belt or belt hip protection.

How to choose a gasoline trimmer for grass?

Before buying a trimmer for the grass, the proposed front of the work is determined, and, based on this, the maximum power and productivity of the tool is selected. Focus on maximum loads, so that the tool successfully copes with the front of work.

The main selection parameters include:

  • Engine’s type. Typers usually used two.Stroke or four.Stroke engines. Models of the first type work from ordinary gasoline and do not need special service. Four stroke engines require a special fuel mixture, but at the same time they are very demanding in care, but have increased power and performance.
  • Power. Everything is simple with this criterion: the higher the power, the greater the performance of the trimmer for the grass. The most powerful devices allow even thick plants and small trees to mow.
  • Weight. Since the trimmer will have to work for a long time, it is desirable that the weight of the tool is not very large.
  • The volume of the gas tank. The larger it is, the longer the trimmer for the grass will be able to work without additional pouring fuel.
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It is also advisable to evaluate the shape of the handle. It should be ergonomic so that the user is convenient to hold the tool. It is also desirable that several sets of nozzles are supplied with the device for working with different vegetation.

TOP-20 rating of the best gasoline trimmers 2021

The location of the price
TOP-4 of the best gasoline trimmers for price/quality for 2021
one Makita EM3400U Find out the price
2 Patriot Pt 553 (11) Find out the price
3 Champion T256-2 Find out the price
4 Stiga SBC 243 D Find out the price
Top 4 best powerful gasoline trimmers
one Huter GGT-2500T Find out the price
2 Champion LMH5640 Wheel Find out the price
3 Huter GGT-2900S Find out the price
4 Patriot Pt 5555es Country Find out the price
TOP-3 of the best four-stroke gasoline trimmers
one Makita EBH341U Find out the price
2 Honda UMK 435 T Urt Find out the price
3 STIHL FS 131 Find out the price
TOP-3 best self-propelled gasoline trimmers
one Champion LMH5629 Wheel Find out the price
2 Champion LMH4412 Wheel Find out the price
3 Ryobi RFT 254 wheeled Find out the price
TOP-3 best professional gasoline trimmers
one Husqvarna 545rx Find out the price
2 STIHL FS 350 Find out the price
3 Echo SRM-350ES Find out the price
Top 3 of the best inexpensive gasoline trimmers
one Huter GGT-1300S Find out the price
2 Patriot Pt 3555es Country Find out the price
3 Alpina TB 320 D Find out the price

Among the huge assortment of gasoline trimmers, there are models in which democratic cost is successfully combined with thoughtful functionality and advanced technical characteristics.

Which trimmer for grass is better, gasoline or electric?

Emerald and well.Groomed lawn on the garden plot pleases the eye of the summer resident. Electric and gasoline mowers, or trimmers for grass (from the English word Trim. Haircut, trimming) help to achieve such a perfectly even grass cover.

Trammers for grass is a hand.Handed tool. Trimmer for grass-cos do not need to be confused with lawnmands. Without a trimmer for grass, you will not be able to mow grass on the edge of the lawn, around a flower bed, berry bushes or along garden paths.

YOUCAN SRM-225 String Trimmer Preventative Maintenance Kits. 90152Y

There are two types of garden trimmers. Gasoline and electric.

To answer the question, which trimmer for grass is better. Gasoline or electric, you should first familiarize yourself with this garden unit.

The cutting element of a trimmer for the grass is a thick fishing line for a trimmer. There are also additional options in the form of a metal disk or knife. The weight of the tool varies from 2.5 to 7 kilograms. The width of the working part, that is, mowing, ranges from 25 to 40 cm.

In gasoline trimmers, the cutting element is driven by the internal combustion engine. If the trimmer motor for the grass is two-stroke, then the fuel for it is a mixture of AI-92 gasoline and oil. In a four.Stroke unit gasoline and oil are poured separately, it is more powerful than two.Stroke and works much quieter. Gasoline trimmer for grass

The volume of the fuel tank in gasoline trimmers ranges from 0.5 to 1.5 liters. The larger it is, the longer the unit will work at the same gas station, but its weight, of course, will be more.

For gasoline trimmers, the motor is usually located on top, but there are exceptions when it is placed in a special satchel, which the porter puts it on the shoulders. Some four.Stroke trimmers for grass have additional nozzles and can turn from braids for teancore, snowmaker and even a cultivator.

For gasoline trimmers for grass are in the range from 9 to 80 thousand.

Electric trimmers for grass operate on the network (equipped with a cable) or from the battery. The electric motor can be located both from above and below. Trammers for grass with the upper location of the motor are more powerful. Additional nozzles can be sold to them. Bush or saw. On models, the names of which begins with the letters ES and EB, you can put a knife-fraise as a cutting element, instead of a fishing line, instead of a fishing line. Electric trimmers for grass operating on batteries are equipped with shoulder belts. Electric trimmer for grass

.

What trimmer for grass should be in the country. Gasoline or electric. Solve the owners. If you need to download grass from time to time on 2-3 acres from time to time, then electric. He has small weight, he is easy to operate, the noise level is quite low. At the same time, such a trimmer for grass has low performance due to low power, as well as dependence on the proximity of the outlet. In addition, it is not recommended to use it in raw weather.

The gasoline trimmer for grass is convenient for medium.Sized areas with an abundance of heterogeneous plantings and a complex relief. He has no binding to an electric outlet. In addition, it is more powerful than its electrical counterparts and therefore is more functional. The disadvantage is a high noise level, significant weight and considerable price.

The principle of operation of four.Stroke trimmers

The operation of a 4-stroke engine occurs according to a certain principle. The piston from the dead point at the top drops down. The intake valve opens and the fuel is absorbed through it. When the piston goes back, the fuel compresses, its temperature increases. When the compression ends, a spark appears between the electrodes on the candle and sets fire to fuel.

In a 4-stroke engine, the working cycle passes for 2 crankshaft revolutions

The formation of combustible gases that pushes the piston down. There is a workflow. Когда поршень мотора триммера для травы находится внизу, он открывает впускной клапан. Due to this, the piston moving up pushes out the exhaust gases from the cylinder. Then the piston is at the top point, the valve closes and the process is repeated by the new.

The crankshaft during work makes 2 turnover. Therefore, the entire period is 4 tacts. Hence the engine characteristic.

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Comparison of goods: Choosing which model to choose and buy

Daewoo Power Products

  • Weight: 8.39 kg
  • Warranty period: 365 DN.
  • Power: 1.50 l.With.
  • Engine: gasoline, four.Stroke
  • Type: portable trimmer for grass
  • Speasing width: 42 cm
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Features: collapsible bar; The width of the mowing with a knife. 25.5 cm
  • Engine revolutions: 6500
  • Decy material: plastic
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 33.5 cubic meter.Cm
  • Fuel tank: on 0.65 l
  • Engine manufacturer: Daewoo
  • Summary: fishing line for a trimmer, knife, shoulder belt, saw disk
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper

Champion

  • Weight: 32.1 kg
  • Power: 5 l.With.
  • Engine: gasoline, four.Stroke
  • Noise level: 104 dB
  • Type: wheeled
  • Speasing width: 60 cm
  • Grass.Collector: absent
  • Moving height: 38-76 mm
  • Moving height adjustment: there is
  • Hand: folding with adjustable height
  • Building Material: Steel
  • Wheel number: two.Wheeled
  • Features: non.Self.Propelled
  • Engine revolutions: 3600
  • Decy material: steel
  • Rear wheels diameter: 35.5 cm
  • Engine brake: there is
  • Working volume: 160 cubic meters.Cm
  • Fuel tank: on 0.9 l
  • Complex: Lines for a trimmer (4 mm),

Makita

  • Weight: 7.1 kg
  • Warranty period: 12 months.
  • Power: 1.40 l.With.
  • Engine: gasoline, four.Stroke
  • Type: portable trimmer for grass
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Features: equipment: lawn mower; unloading vest; 4 tooth knife; knife casing; Installation key
  • Knife rotation speed: up to 6850 about./min
  • Engine revolutions: 10,000
  • Decy material: plastic
  • Dimensions (SKDXV): 62x181x50 cm
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 33 cubic meters.Cm
  • Fuel tank: on 0.65 l
  • Complex: Lines for trimmer (2.4 mm), knife, shoulder belt
  • Ring: Direct
  • Wheels: absent
  • Engine location: upper
  • Weight: 8.6 kg
  • Warranty period: 12 months.
  • Power: 2 l.With.
  • Engine: gasoline, four.Stroke
  • Anti.Vibration system: there is
  • Type: portable trimmer for grass
  • Speasing width: 43 cm
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Knife rotation speed: up to 10,000 about./min
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 43 cubic meters.Cm
  • Fuel tank: on 0.62 l
  • Summary: fishing line for a trimmer, knife, shoulder belt
  • Detailed equipment:. Lawn mower;. 4 gear knife;. Fishing line for trimmer;. Protective casing;. Unloading vest;. Installation tool
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper

Redverg

  • Weight: 6.5 kg
  • Warranty period: 1 g.
  • Power: 1.34 l.With.
  • Engine: gasoline, four.Stroke
  • Type: portable trimmer for grass
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Decy material: plastic
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Summary: Lines for a trimmer (2 mm), knife, shoulder belt
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper
  • Weight: 10.8 kg
  • Power: 1.70 l.With.
  • Engine: gasoline, four.Stroke
  • Noise level: 96 dB
  • Type: portable
  • Speasing width: 44 cm
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Features: indifferent bar; The knife is 40 teeth in the kit
  • Decy material: plastic
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 38 cubic meters.Cm
  • Fuel tank: on 0.95 l
  • Complex: Lines for trimmer (2.4 mm), knife, shoulder belt, bureau.Cutter/brush
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper

Stihl

  • Weight: 5.8 kg
  • Warranty period: 730 days.
  • Power: 1.90 l.With.
  • Engine: gasoline, four.Stroke
  • Noise level: 97 dB
  • Anti.Vibration system: there is
  • Type: portable trimmer for grass
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Decy material: plastic
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 36 cubic meters.Cm
  • Fuel tank: on 0.71 l
  • Engine manufacturer: Stihl
  • Summary: fishing line for a trimmer, knife, shoulder belt
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper

Carver

  • Weight: 7.6 kg
  • Warranty period: 1 g.
  • Power: 1.07 l.With.
  • Engine: gasoline, four.Stroke
  • Type: portable trimmer for grass
  • Grass.Collector: absent
  • Pen: with adjustable height
  • Building Material: Plastic
  • Features: with a knife width. 25 cm
  • Decy material: plastic
  • Engine brake: there is
  • Installation possibility: bush cutter/brush
  • Working volume: 31 cubic meters.Cm
  • Fuel tank: on 0.95 l
  • Complex: Lines for trimmer (2.4 mm), knife, shoulder belt
  • Ring: Direct
  • Handle shape: T-shaped (bicycle)
  • Wheels: absent
  • Engine location: upper

TOP-5 four-stroke trimmers

We have made a rating of 4-stroke trimmers, which have many positive reviews.

Makita EBH341U

Powerful, low.School, high.Quality materials. Calmly starts and works evenly at idle. Highly mows high grass and weeds, it is possible to install a bush. The upper location of the engine, straight rod, shoulder belt. The unloading vest includes, a knife with 4 teeth, a knife casing, a mounting key.

Engine. Gasoline, four.Stroke;

Power. 1.40 l.With;

Weight. 7.1 kg.

Champion LMH5640 Wheel

Great trimmer for grass for uneven areas, assembly from the box in 10 minutes. Maneuverable, easy to control, high.Quality plastic, covered with powder paint. Large capture width, fast fishing.

Type. Wheel trimmer for grass;

Speasing width. 60 cm;

Engine. Gasoline, four.Stroke;

Power. 5 l.With;

Weight. 32.1 kg.

Makita EM4351UH

Powerful, low.Noise, strong trimmer for grass. Anti.Vibration system, unloading vest, carbine for fastening. A complete set of adjustments. Protective casing, 4 gear knife. Direct bar, trimmer fishing line, mounting tool.

Speasing width. 43 cm;

Engine. Four.Stroke gasoline;

Power. 2 l.With;

Weight. 8.6 kg.

STIHL FS 131

Productive semi.Professional trimmer for grass. Light, excellent balancing, ergonomic belt with comfortable adjustments. Convenient adjustment of a two.Handed handle without a tool, installing a brush cutter. Stihl engine, plastic deck and case. Trammer fishing line, knife, shoulder belt. Anti.Vibration system.

Speasing width. 50 cm;

Engine. Gasoline, four.Stroke;

Power. 1.90 l.With;

Weight. 5.8 kg.

Honda UMK 435 T Urt

Silent work without vibrations, volume of fuel tank 0.63 l. Thick twisted fishing line for a trimmer allows even a light shrub to mow. Correctly designed working part, Honda engine. Upper location of the motor, adjustable handle.

Speasing width. 44 cm;

Engine. Gasoline, four.Stroke;

Power. 1.35 l.With;

Weight. 7.51 kg.

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