Do-it-yourself Ural 2 electron chainsaw carburetor repair

In detail: do-it-yourself Ural 2 electron chainsaw carburetor repair from a real master for the site my.housecope.com.

For their own needs in terms of logging or some kind of household needs, many choose the Ural 2 saw. This unit is still very popular today. It is not for nothing that the manufacturer of these saws has produced about 14 million products of this series.

As a result, we have a chainsaw, which becomes a powerful and reliable assistant in any household. And despite the fact that in modern shops of gardening tools there are enough different models, the Ural 2 Electron saw still enjoys a certain popularity.

The complete Ural 2 chainsaw has:

The total weight without a starter is 11.7 kg.;

Productivity - 100 sq. Cm / sec;

Fuel consumption at maximum power is about 500 ml / hour.

For initial work with a chainsaw, no special settings are required. You just need to fill in fuel according to the factory instructions. And it must also be said that the Ural 2 chainsaw does not require carburetor adjustment. At least for normal work.

However, it may gradually become clear that the saw operation requires some adjustment in order to properly select the fuel mixture. So that the setting does not cause any difficulties, it is worth taking a screwdriver, a data sheet from the device itself and several wrenches of the appropriate size. It is also worth remembering some of the features of this process:

Beforehand, it is worth familiarizing yourself with the manual for the saw, which should describe the factory settings;

It is important to regulate the saw operation strictly in idle mode. Therefore, first start the engine and hold it at idle speed. After using the adjusting screw, bring the engine to such a state, in which it will independently increase the speed. But the chain must not move along the bus;

Video (click to play).

Further adjustment of the Ural 2 saw is carried out at medium speed;

If smoke is detected from the engine, quickly tighten the screw until the smoke stops escaping. If the engine continues to run normally at the same time, it is worth adjusting the ability of the engine to speed up quickly when opening the throttle.

Checking the throttle response of the engine is done by setting low revs and sharply pressing the throttle lever to the very bottom. If the engine stalls or cannot pick up speed quickly enough, then you will have to unscrew the screw a little more.

When all the necessary adjustments have been made, you need to fix the adjustment view using the lock nut.

These are the manipulations worth doing in order to answer the question of how to adjust the engine in this wonderful saw.

This procedure does not require special skills. You just need to do everything according to the scheme:

The engine turns on and just heats up for a while;

The owner of the saw determines for himself the most persistent turns of the tire set;

After that, the saw is transferred to a lower speed;

A sharp jerk of the starter is produced. A sharp increase in engine speed should occur. If the ignition is set correctly, then this will happen.

Knowing such a simple technique, you will not have any questions about how to adjust the ignition in this simple saw.

In order to achieve minimal friction between knots in a new saw, it needs to go through a certain run-in process. At this stage, the saw should be set to different operating modes. We are talking about the alternation of idle mode with loads of different sizes. Wherein:

It is imperative to start the first hours of saw operation at idle speed, gradually moving to low and medium loads;

A high concentration of lubricant is made in the running-in mixture - about 15 to 1;

It is recommended to carry out a break-in process, during which about 4 full tanks of the device are used up.

Any tool can fail over time. This is an indisputable fact. It should, however, be noted that the repair of the Ural 2 electron chainsaw basically comes down to working with the engine. Such units in a saw can stall under a certain load, keep idle speed weakly, and so on.

A defective carburetor may be the cause of the saw stopping immediately after starting it. It will have to adjust the jets in order to receive the appropriate fuel supply.

When a hot engine stalls, you will most likely have to change pistons, spark plugs or clean the air filter. It must be said that a fully serviceable motor in the saw is simply obliged to work without jerking. If, during its operation, a ringing knock is heard, then this may indicate a malfunctioning cylinder.

Chainsaw Ural-2 Electron is a powerful mechanized device of a professional class, designed for felling and crosscutting large-trunk trees, harvesting and sawing firewood. The unit can be used in harsh and aggressive conditions, as well as at low and high ambient temperatures. The saw works autonomously, does not depend on the power source and is easy to transport.

Tool manufacturer - Perm Machine-Building Plant named after F.E. Dzerzhinsky.

As a constructive basis, the widespread in the USSR household model Friendship was taken, developed specifically in honor of the 300th anniversary of the reunification of Ukraine with Russia.

The main distinguishing features of the Ural chainsaw are higher power and efficiency. She is able to work without interruption for about 8 hours, 10-16 hours a day.

Technical and operational characteristics of the Ural-2 Electron chainsaw:

  • Dry weight without starter - 11.7 kg.
  • The length of the device is 880 mm.
  • Width - 455 mm.
  • Height - 460 mm.
  • Cutting speed - 11 m / s.
  • Sawing performance - 100 cm² / s.
  • Weighted vibration acceleration on the saw handles - 13.67 m / s².
  • The working length of the saw bar is 460 mm.
  • The chain pitch is 10.26 mm.
  • Sound level - 105 dBA.
  • The volume of the fuel tank is 1.6 liters.
  • The volume of the saw unit's lubrication tank is 0.24 liters.

Engine specifications:

  • Engine type - gasoline 1-cylinder 2-stroke.
  • Power - 5 HP With.
  • The cylinder diameter is 55 mm.
  • Fuel consumption at maximum power - 632 g / kW * h.
  • Rotation frequency - 6200 rpm.

According to the instruction manual for the chainsaw, the device must be re-preserved and assembled before work is carried out.

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The petrol saw is assembled in the following sequence:

  1. Unscrew the screw, disconnect the clamp elements of the frame structure.
  2. On the side of the crankcase cover, the engine is installed in a vertical position, a gearbox is mounted on it with a connecting flange, the mechanisms are fastened with a clamp.
  3. The screws are inserted into the grooves until they are secured.
  4. The handle is connected to the carburetor throttle control cable so that the gap between the elements is 15-16 mm.
  5. Adjust the tightening of the external fasteners.

The chainsaw is run in first at idle speed, then during operation.

The operation at idle speed (XO) is carried out until 4 refueling of the gas tank is fully used.

The fuel mixture is prepared in the following ratio: 1 liter of universal motor oil to 15 liters of gasoline.

Waste oil is not used, otherwise the needle bearings of the connecting rod will fail. Do not use leaded gasoline and fuel contaminated with mechanical impurities or water. Subsequently, the liquids are mixed according to the 20: 1 scheme.

Running-in during operation is carried out during the first 25 hours, the engine is not overloaded.

For the Ural-2 Electron gasoline-powered saw, a chain of the MI-10.26 U-16 Strong brand is used.

In the process of work, it stretches, therefore, the tension must be periodically adjusted with the screw of the tensioner. The saw chain can be easily removed, switched on and off automatically using a centrifugal friction clutch.

Sharpening is performed with a round cylindrical file with a diameter of 5-6 mm, followed by immersion in oil for 5-10 minutes.

If during operation malfunctions or breakdowns are revealed, then the current repair of the Ural-2 Electron chainsaw is done by hand.

Remove the bearings from the crankshaft and gears of the gearbox. The carburetor is not disassembled. Disassembly is carried out only in cases of extreme necessity, for example, the ignition system is working properly, the carburetor is adjusted, and the chainsaw does not work.

After disassembling the crankcase, a paper gasket is installed and reassembled.

When replacing the seals, the new elements are mounted with light hammer blows through a wooden mandrel into the seats of the crankcase and bearing caps.

Straightening corrects the curvature of the guide bar.

Chainsaw Ural-2T Electron does not start if there is no fuel in the tank or an empty fuel chamber. If the fuel supply is poor, the gas line and filters of the sump and carburetor are cleaned. When the engine is oversaturated with fuel and the spark plug electrodes are completely immersed in it, the cylinders are purged.

If there is no spark between the electrodes, clean the candles, rinse with gasoline, set a gap of 0.6 mm, change if necessary.

For the stability of the XO of the crankshaft, the minimum consumption of materials and the reduction of air pollution, the carburetor of the Ural chainsaw is adjusted.

CW are regulated by changing the quality and quantity of the fuel mixture. The quantity is adjusted by turning the screw that limits the movement of the throttle control lever towards the closing side, the quality is adjusted with the screw of the chainsaw carburetor.

To adjust the XO, it is necessary to start the engine and warm it up at low and medium speeds. In this case, the screw is turned until the moment at which the saw chain does not move along the bar.

Adjustment to maximum power is carried out with the carburetor screw after 25 hours of running in and after adjusting the XO by depleting or enriching the mixture in the operating mode. When screwing in, the mixture becomes lean, when unscrewed, it is enriched.

You can buy a new Ural-2 petrol-powered saw for 14-14.5 thousand rubles.

The secondary market offers a tool for 5-7 thousand rubles, depending on the working condition.

Maxim, 33 years old, St. Petersburg

Powerful, unpretentious, easy-care workhorse. Saws and cuts perfectly, fuel consumption is low. The chain with strong teeth does not break, does not bend.