Chainsaw Ural engine specifications

Technical characteristics of the Ural tool

A qualitative indicator of the Ural brand is a powerful and economical two-stroke gasoline engine. Ease of use and lightweight design make it indispensable in such work as building a wooden house, sawmill, logging, and household preparations for the local area. Let's look at the characteristics of the Ural chainsaw with a detailed description of the advantages of the tool.

Gas engine

Designed for professional purposes, the Ural 2 Electron chainsaw has the following engine characteristics:

Power 5 l. With.
Single cylinder
Piston diameter - 5.5 cm, cylinder volume - 109 cubic meters. cm.
Push-pull
Gasoline consumption at maximum power is 0.63 liters, at working power – 0.47 liters.
The crankshaft operating cycle frequency is 2600 rpm.

The two-stroke engine is powerful and reliable enough to quickly chop wood within 11 cubic meters. in a minute.

Cylinder

To improve wear resistance, the aluminum cylinder is coated with a silicon-nickel alloy called Nicosil. Cylinder volume 109 cc. cm provides sufficient power for a chainsaw. The cylinder has an inlet channel for the gasoline-gas mixture, exhaust channels and purge channels. The execution of certain proportions of the sizes of the exhaust and purge holes ensures high-quality ventilation of the cylinder cavity from exhaust gases.

Gas tank

The volume of the fuel tank is 1.6 l, and for oil - 0.24 l.

To increase the durability of the engine, you should use the grades of gasoline specified by the manufacturer in the passport. In a two-stroke engine, it is worth using special grades of oils that combine well with gasoline and do not leave a large sediment when burned in the chamber.

The gas tank is filled with a mixture of AI-72 gasoline and M-8B engine oil. The lubricant tank is filled with oil in summer, and in winter - with the addition of gasoline in a ratio of 3/1.

Carburetor

A carburetor is necessary to create an air-fuel mixture of a adjusted proportion, entering the cylinder in certain doses. The tool uses a modification of the KMP-100U carburetor. It must be adjusted at the factory, but you can independently adjust the unit in various operating modes to obtain maximum engine efficiency.

Before first use, it is recommended to keep the tool for several hours with a tank filled with fuel to saturate the carburetor membrane.

Bar length and chain

The length of the working surface of the saw is 46 cm. A cutting chain is placed on it, which requires periodic sharpening and tension.

Advice: during prolonged downtime of the tool, it is better to remove the cutting chain, and it is more convenient to sharpen it on a chain put on the saw.

The weight of the assembled chainsaw is about 12 kg.

Ease of use

The Ural 2 Electron chainsaw is equipped with high, comfortable handles that allow you to work in an extended position and under thick snow cover. The tool frame and holder are equipped with vibration-reducing hinges and spring units for safe operator operation. The unit maintains operating condition in the range of high and low temperatures. High engine power speeds up the work process.

Chainsaw Ural

Detailed information on the operation of the Ural chainsaw can be found by downloading the instructions presented on the website below.

Technical characteristics of the Ural 2 Electron chainsaw

Dry weight of chainsaw without starter, kg no more than 11.6

Movement of the chainsaw when felling from right to left

Sawing performance, cm 2 s, not less than 100

Cutting speed at rotation speed 6200+: 200 rpm (calculated), m/s 11

Weighted total vibration acceleration on chainsaw handles, m/s 2, not more than 13.67

Sound level dBA, no more than 105

Overall dimensions, mm length 880, width 455, height 460/500

Note - At the request of consumers, the chainsaw can be equipped with a frame made of alloys and steel with a corresponding change in weight and overall dimensions

Engine

Cylinder displacement, cm 3 109

Cylinder diameter, mm 55

Engine power after 25 hours of operation kW (hp), not less than 3.68 (5)

Maximum power crankshaft rotation speed, rpm 6200 ±200

Fuel consumption at maximum power mode, g/kW.h. (g/l s.h), no more than 632 (465)

Carburetor adjustment

Adjusting the idle speed of the chainsaw engine.

The adjustment is made by changing the quality and quantity of the combustible mixture entering the engine cylinder. The amount of mixture is changed by screw 3 (Figure 1), which limits the rotation of the throttle valve control lever 1 towards its closing. The quality of the mixture is changed with screw 1 (Figure 2) of the carburetor. When adjusting engine idle speed, you should be guided by the following requirements:

a) The engine should idle steadily and the saw chain should not move along the bar.

b) There should be no strong smoke when the engine is running.

c) The engine should have good throttle response, that is, when the throttle control lever is pressed sharply, it should quickly gain speed.

d) It is recommended to adjust the idle speed in the following sequence: - start the engine and warm it up at low and medium speeds. Use screw 3 (Figure 1) to set the minimum stable speed at which the saw chain does not move along the bar. If the engine smokes heavily (a sign of an excessively rich mixture), then partially tighten screw 1 of the carburetor. At the same time, the engine speed will increase and the exhaust smoke will decrease; — after this, you should again set the minimum, stable engine speed by partially unscrewing screw 3 (Figure 1); — after this adjustment, it is necessary to check the engine response. To do this, sharply press the throttle control lever for 2-3 seconds until it stops. In this case, the engine should quickly gain momentum. If the engine stalls or has a “drop” in power, that is, it slowly picks up speed (lean mixture), then it is necessary to partially unscrew screw 1 of the carburetor. Engine speed will decrease. To increase the idle speed, screw 3 must be partially tightened. Check engine response again; — upon completion of the adjustment, secure screw 3 with locknuts 2 (Figure 1).

4.5.2 Adjusting the engine for maximum power

This adjustment should be made after a 25-hour run-in of the chainsaw in operation and after adjusting the engine idle speed. The adjustment is made with screw 2 (Figure 2) of the carburetor, by making the combustible mixture leaner or richer at engine operating mode. When the screw is partially screwed in, the mixture becomes lean; when unscrewed, it becomes richer. The most advantageous position of the carburetor screw 2 is determined experimentally by checking the operation of the chainsaw when sawing wood. In this case, you should be guided by the following requirements for the operation of a chainsaw.

a) The chainsaw engine must develop power that ensures high sawing performance with moderate exhaust smoke.

b) The chainsaw engine must have good throttle response, must not overheat, slow down and stop when sawing wood (overheating of the engine is a sign of an excessively lean mixture and engine overload). Due to lack of experience, there may be cases of complete misadjustment of the carburetor, in which case the chainsaw stops working normally and starting the engine becomes difficult.

Manufacturing plant

The Ural Electron chainsaw was produced by the Perm plant named after. Dzerzhinsky for more than half a century from 1955 to 2008. The Perm Defense Industry Plant produced various products for the needs of the Soviet army, and initially Ural chain saws were produced for the needs of the SA (Soviet Army).

Over the entire period, more than 14 million Ural Electron chain saws were produced. In those years, the logging industry in the country was developing by leaps and bounds. It’s interesting that, according to experts, about 70% of the forest felled with chain saws comes from the Ural Electron model.

Purpose

In the USSR, 2 models of chainsaws were mass-produced - the Ural and Druzhba, and there was also the Parma electric saw. The Druzhba model was planned for small farms and was a “folk” product, and the Ural model was positioned as a professional-level tool intended for logging on an industrial scale.

Although in general these two saws are very similar, the Ural, as a more professional tool, has the ability to rotate the blade to a horizontal position in order to cut down a tree trunk while standing and not put so much strain on the operator’s back.

The use of the Urals in everyday life or at work greatly facilitates the already physically difficult work of loggers. This chainsaw can not only cut down trees, but also use it as an assistant in construction and household work, dismantling, bucking, and sawing firewood.

Bar and chain

The Ural Electron 2 chainsaw has a guide bar of 460 millimeters. It comes with a chain as standard. It is removable and is removed during long-term storage or preservation of equipment.

Since chain links stretch during operation, this is a natural process, it is necessary to periodically monitor its tension, in other words, adjust it. The new chain stretches more strongly.

An excellent choice for this chainsaw would be the MI-10.26.16 Strong chain. After long-term use, the chain requires sharpening. For manual sharpening, a round file in the shape of a cylinder with a diameter of 5-7 mm is suitable. When sharpening, there is no need to remove the chain from the device; it is enough to simply increase the tension and sharpen “in place.”

Specifications

two-stroke engine with one cylinder;
motor power 3.67 kW or 5.5 horsepower;
crankshaft rotation speed – 16200 per minute;
fuel consumption - 632 g/kW*h;
cylinder diameter in the engine – 55 mm;
fuel tank capacity - 1.6 liters;
lubricant capacity - 0.24 liters;
guide bar length – 460 mm;
number of links of a standard chain – 64 pcs;
groove width – 1.6 mm;
useful length of the sawing apparatus – 460 mm;
overall dimensions - 46x46x88 cm;
weight – 11.7 kg.

It is necessary to carry out timely running-in of the engine for long-term and reliable operation. The initial start of the engine must be done at idle speed without load, that is, without using a saw for cutting. Moreover, use an enriched composition of the fuel mixture.

Advantages

The main advantages of the Ural Electron 2 chainsaw include:

high power among competing chainsaws;
simple adjustment of the tool after final assembly out of the box, which the average man can handle;
the presence of detailed operating instructions with detailed diagrams of all components and the structure of the motor;
excellent cut and cutting quality;
moderate fuel-oil mixture consumption for its class;
comfortable grip for felling trees while standing, due to the upper position of the handles;
“indestructible” motor with a huge resource due to the use of high-quality and high-strength parts;
endurance to heavy loads;
the rotating gearbox allows you to move the saw bar to a horizontal position, making it convenient to hold the saw with a straight back;
easy to adjust chain tension;
the engine can operate with low quality fuel;
cheap spare parts.

When working on the Ural Electron 2 model, the developers were tasked with developing a chainsaw that could be used in any climate and in various weather conditions without loss of power or reduction in cutting quality. The engineering and design staff coped with their task. The device was made of materials of increased strength, which made it possible to use the saw in environments with high humidity, sand and at any temperature.

A review of the Ural Electron chainsaw produced in 1991 is done in the following video, which also shows how to start the tool:

Advantages and disadvantages of the tool

Reviews from owners of the Ural 2T Electron saw show that the device has a number of advantages and disadvantages.

The advantages include the following characteristics:

high power;
easy adjustment of the tool after assembly;
instructions with a detailed diagram of the saw, assembly diagrams and engine design;
excellent sawing quality;
moderate consumption of gasoline and oil;
high-quality two-stroke engine with a long service life;
ability to withstand heavy loads;
simply adjust the chain tension and all tool parameters;
can run on medium quality fuel;
has an affordable price compared to foreign chainsaws of the same class, and a detailed instruction manual.

Owners call the disadvantages of the Ural T Electron chainsaw:

heavy weight (hands get tired quickly when working);
new models no longer come off the assembly line;
massiveness of the product;
in some regions there are difficulties with repairing older models.

Video review of the Ural 2-T Electron chainsaw

Video of the Ural 2T Electron chainsaw:

Review and launch of Ural Electron:

Video about a snowmobile using a Ural chainsaw

The most popular homemade chainsaws Ural and Druzhba

Flaws

But, like every working tool, the Ural Electron 2 model also has disadvantages:

heavy weight, when holding the saw with your hands, the latter quickly get tired during active work;
the model is no longer produced by the manufacturer;
overall massiveness of the device;
in remote areas of the country there may be difficulties with spare parts.

In the Urals, developers have provided a vibration damping system, but even with its use it was not possible to reduce their level to completely safe values and vibration during sawing is noticeably felt. Therefore, in connection with labor safety rules, the feller is recommended to use the chainsaw for no more than two hours a day; with longer use, the worker may develop occupational diseases.

User manual

Many users prefer not to waste their time reading the instruction manual and immediately proceed to start up the chainsaw for the first time. If you manage to start the tool, then immediately begin sawing. Such users often refer to their knowledge and many years of experience, this is not bad, but after purchasing a Ural 2 Electron chainsaw, it is still better to refresh your theoretical knowledge and read the necessary parts of the operating instructions. You can download the operating instructions for Ural Electron 2t in our instructions catalog.

Features of using a chainsaw

Rules for the use and maintenance of the Electron Ural 2t chainsaw:

for optimal functionality of the tool, use a fuel mixture in a ratio of 1:50, this is the optimal ratio for high-quality operation of a two-stroke engine;
after a break in work, use only fresh fuel mixture;
regularly check the condition of the chain and bar, make sure that the chain receives lubricant;
use high-quality fuel, high-viscosity oil and pure gasoline;
store the saw in a dry place, under a waterproof cover;
upon completion of work, clean the chainsaw body from dirt;
work only with hearing protection and cover your face with a special plastic mask;
replace fuel and air filters and spark plugs according to the instructions;
Adjust the chainsaw carburetor annually.

How to adjust the carburetor on a Ural chainsaw?

The carburetor is adjusted in idle mode using the adjusting screw. If the carburetor is adjusted correctly with the screw, the engine will increase speed on its own without moving the chain along the tire.

Video about adjusting the carburetor of a Ural chainsaw:

How to adjust the ignition on a Ural chainsaw?

The ignition adjustment of the Ural chainsaw is done as follows: turn on the saw and allow the engine to warm up, then the owner of the saw determines when the tire set produces the most stable speed, and then switches the tool to low speed and sharply pulls out the starter cord. As a result of this action, the engine speed will increase, this will mean that the ignition is set correctly.

Ignition circuit for the Ural 2 Electron chainsaw:

Ignition circuit for the Ural 2 Electron chainsaw

Malfunctions of the Ural 2-T Electron chainsaw

Owners of the Ural 2T Electron chainsaw may encounter the following most common tool malfunctions:

Lack of high-quality sawing, the tire moves “heavily” on wood and produces small chips.

Reason: the chain is dull and needs sharpening or replacement.

There is a strong noise, knocking, rattling when the chainsaw is operating.

Reason: the carburetor needs to be adjusted, the carburetor needs to be adjusted in the service.

The saw began to stall right during operation, or completely refused to start.

First start

Algorithm for starting the chain saw engine:

Turn the ignition switch to the operating position.
Pump some gasoline into the carburetor, then pull out the choke.
Pull the recoil starter with a sharp and short movement, thereby starting the engine.

If you pull the starter slowly or jerkily, the engine will not be able to spin up enough for the spark plug to spark, but it is very easy to fill the head of the spark plug with gasoline during such movements. If this happens, you need to warm up the spark plug so that excess gasoline can evaporate.

Possible faults

Chainsaw owners sometimes face the following problems:

A poor-quality saw, the chain bites heavily into the wood, produces a lot of fine wood dust, and grinds the wood down like a file. Reason: The chain is already dull; it needs to be sharpened or a new one used.
There is a strong knock of the motor, the saw rattles in the hands under load and intensive work. Reason: the carburetor is not properly adjusted.
Ural Electron stalls during active sawing or does not start at all. There are several possible reasons: the fuel mixture is of poor quality, the ignition system is faulty, the spark plug needs to be checked for carbon deposits or replaced with a fresh one.

One of the possible malfunctions inherent in the Ural Electron chainsaw is described in the following video:

What does Ural 2T Electron consist of?

The chainsaw consists of the main components:

Motor;
Starter unit;
Start and stop button;
Fuel hose;
Gas tank with lubricating container;
Control levers;
Two sprockets (driven and driven);
Handles;
Muffler.

Comparison with Friendship

Ural and Druzhba are very similar and were produced at the same enterprise, but they still have differences:

The Ural is more powerful, 5.5 horses versus 4 for Druzhba;
The Friendship chainsaw is 1.2 kg heavier;
The Ural drive allows you to rotate the saw bar 90 degrees for easier work when felling trees;
The Ural handles are placed on top, this allows you to work for a long time in heavy snow and creates less stress on the feller’s back;
The Urals have a chain lubrication system when sawing, which significantly extends the service life of the saw;
The hydraulic wedge is included in the standard kit of the Ural Electron 2 saw; it allows you to fell trees in a given direction.

Chainsaw "Ural"

A chainsaw is a hand-held tool equipped with an internal combustion engine. The handle helps you hold it in your hands, and the working part is the tire. The tool is quite mobile, so it is indispensable for private farming and logging.

Simple household saws have a somewhat simplified structure, which makes them easy to use by the average person without experience. But its operating conditions are milder - the operating time per month is no more than 20 hours. Professional units, for example, “Ural”, are wide-profile and the conditions in which they can be used are much more severe, including operating time.

Initially, the Ural chainsaw was designed as a highly specialized professional tool for forestry. Therefore, its sister chainsaw “Druzhba” is more familiar to the private user, while the “Ural” is used mainly by professional fellers. Its productivity provided 80% of domestic logging. The first Ural chainsaw saw the world in 1935, and in 2005 the plant named after F.I. Dzerzhinsky produced the 14 millionth unit of this equipment.

What is the difference between the Ural and Druzhba chainsaws?

Although both of these saws are similar in many ways, they have a number of differences:

“Ural” has a higher power rating - 5 horsepower, in comparison, “Druzhba” has only 4 hp;
The Ural's light weight of 11 kg (Druzhba's is 12.5) makes the tool more convenient to use;
“Ural” is equipped with a gearbox capable of turning the saw bar 90 degrees, which greatly facilitates felling of timber;
The upper handles of the “Ural” allow you to work even with a large thickness of the snow layer. In addition, the operator’s back practically does not tolerate overload;
The Ural chainsaw has been improved with a hydraulic wedge for felling trees in the required direction. A chain lubrication system has also been introduced, which was not present in the previous model.

Automatic chain lubrication allows you to work with very high productivity. It is interesting that lumberjacks thought of replacing the Ural sawing mechanism with a Stihl one, receiving increased productivity from such a modification.

Disadvantages of the Ural chainsaw

Of course, like any unit, with all its advantages, the Ural chainsaw also has its disadvantages:

Soot from the engine while operating the tool. Even taking into account the rather high position of the handles, the logger often has to breathe not the aromas of the forest, but the smoke;
Excessively large mesh from the air filter, unlike foreign brands. Thus, the domestic unit has a grid cell in tenths of a millimeter, and foreign ones in fractions of a micron. This fact significantly reduces the productivity of the tool;
Increased proportions of gasoline and oil 20:1 compared to imported models operating at 50:1;
Periodic problems with gearbox failure and engine jamming;
The saw does not have a chain brake.

But you can also find positive aspects among factors that at first glance seem to be negative. For example, the engine parts of the Ural chainsaw are not as meticulously fitted as those of a foreign unit. For this reason, the ingress of small debris does not cause much harm, burning inside.

Reviews of the Ural Electron 2 chainsaw

Yuri Litvinov, Kaluga, private developer, saw in use for more than 15 years.

Advantages: Very powerful compared to modern Chinese-made chainsaws. A simple design, but at the same time very maintainable. It works long hours in the forest, doesn’t stall or lose speed at any temperature, it doesn’t matter whether it’s summer or winter.

Disadvantages: Quite strong vibration and heavy weight, but you have to put up with this, because all the parts are made of metal and there is no doubt about their quality.

Ilya Stepanov, Irkutsk, owner of a peasant farm, operating the saw for 12 years.

Advantages: Comfortable horn handles located on top. A rotating gearbox that turns the saw bar. It is very convenient to cut in winter when there is a layer of snow. Unpretentious to the type of fuel and oil. Powerful and there is practically nothing in the design to break, cheap spare parts.

Disadvantages: Sometimes the candles burn out, you have to buy new ones. Perhaps the problem is an incorrectly configured carburetor, because no one has adjusted it since the moment of purchase, which is more than 11 years.

Chainsaw "Ural"

What is the difference between the Ural and Druzhba chainsaws?

Although both of these saws are similar in many ways, they have a number of differences:

“Ural” has a higher power rating - 5 horsepower, in comparison, “Druzhba” has only 4 hp;
The Ural's light weight of 11 kg (Druzhba's is 12.5) makes the tool more convenient to use;
“Ural” is equipped with a gearbox capable of turning the saw bar 90 degrees, which greatly facilitates felling of timber;
The upper handles of the “Ural” allow you to work even with a large thickness of the snow layer. In addition, the operator’s back practically does not tolerate overload;
The Ural chainsaw has been improved with a hydraulic wedge for felling trees in the required direction. A chain lubrication system has also been introduced, which was not present in the previous model.

Disadvantages of the Ural chainsaw

Of course, like any unit, with all its advantages, the Ural chainsaw also has its disadvantages:

Soot from the engine while operating the tool. Even taking into account the rather high position of the handles, the logger often has to breathe not the aromas of the forest, but the smoke;
Excessively large mesh from the air filter, unlike foreign brands. Thus, the domestic unit has a grid cell in tenths of a millimeter, and foreign ones in fractions of a micron. This fact significantly reduces the productivity of the tool;
Increased proportions of gasoline and oil 20:1 compared to imported models operating at 50:1;
Periodic problems with gearbox failure and engine jamming;
The saw does not have a chain brake.

Professional for home

The Ural chainsaw can also be successfully used as a home assistant. It will do an excellent job with routine pruning of trees, sawing firewood, as well as when working with any wood. It can make cuts both across the fibers and along them. Almost no weather conditions frighten this instrument, but within -40 and +40 degrees Celsius. There is nothing overly complicated in servicing a chainsaw - refueling with a mixture of gasoline and oil.