The Chainsaw Does Not Develop Speed

What if the chainsaw does not idle?

Idling problems are considered constant companions of chainsaws. There may be several prerequisites that could lead to glitches at the time of starting and spinning of the circuit during idle operation, the main of which are:

  • Clogging of the air and gasoline filter;
  • Poor quality fuel mixture or improper preparation;
  • Malfunctions of the ignition module;
  • A carburetor whose settings have ceased to correspond to the load on the saw;
  • The propulsion elements are deformed or rusted.

A number of actions are performed sequentially:

  • Flush the fuel hose or replace it with a new one,
  • Clean the air filter that could be clogged with sawdust and dirt particles. Modern air filters are reusable, they can be washed with the addition of detergent, completely removing them from the saw body;
  • Check gasoline and engine oil, which may be of poor quality or simply not suitable for working with this saw;
  • Test candles and carburetor.

Eliminating one or more possible faults usually returns the saw to its former strength.

The chainsaw does not develop speed: we test the device for malfunctions

The ignition module can be diagnosed for problems visually. For this you need:

  • Turn out the candle;
  • Evaluate its appearance (it should not be drenched in gasoline or contain a black coating);
  • Check the distance between the coil and the magnets (up to 0.2 mm);
  • If necessary, examine the spark plug block for spark supply using a working mains wire.

If, after checking, no defects were found, it is worth moving on to checking the carburetor block.

This work unit is one of the most vulnerable in modern chainsaws. New tools that are shipped from the factory have basic settings for low and high speeds, which must be reset after running in and running in all parts. Similar actions are performed if the saw does not develop traction corresponding to the maximum torque according to the instructions.

In this case, you need to reconfigure one of them, the H jets, responsible for the operation of the saw under load. To do this, it is enough to adjust the fuel supply with the engine running at the highest speed of rotation of the chain using a tachometer and operating instructions.

The chainsaw is not gaining momentum: an overview of the reasons and DIY repair

Malfunctions occur both with expensive German or American modifications of chainsaws, and with their cheap Chinese fakes. It’s nice when the moment of starting the motor tool goes smoothly: the saw warms up and gradually reaches the rated power declared by the manufacturer, which is issued throughout the entire working cycle. Things are worse if everything happens the other way around: after pulling the throttle cable, the unit starts to slip, it works in jerks after short pauses, stalls and starts up again from the pusher.

There can be many reasons for this phenomenon, as well as scenarios for the development of events. Let’s consider in detail each working situation and breakdowns that preceded them.

Why the chainsaw isn’t picking up steam?

Launching is a complex multi-level process in which almost all the saw’s life support systems are involved. That is why the fact that the saw loses speed, turns on intermittently and feels confident exclusively at idle should be considered from different angles.

Such factors could lead to this:

  • A faulty engine, its service life could be exhausted, and the piston rings and the cylinder could wear out, deform or even corrode;
  • A failed spark plug or the coil itself, as a result of this, the spark required to ignite the fuel-air mixture is not generated;
  • Unbalance of the carburetor screws, as well as a number of reasons that could disable it.

Other chainsaw malfunctions

A lot of users are faced with a nuisance when the chainsaw does not slow down. The device reaches its maximum power in a matter of seconds, which cannot be reduced.

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This may be due to the fact that:

  • The throttle valve does not function; its spring or traction element has weakened;
  • The toggle switch does not switch well;
  • Throttle shaft has lost its spin.

But there may also be a reverse situation when the saw gains power uncontrollably. The reasons why the chainsaw itself is gaining momentum should be sought in:

  • The carburetor must be cleaned or readjusted;
  • Fuel supply system, gas filter, fuel hose;
  • Malfunctions of cylinder-piston or branch pipes connecting them to the carburetor.

There are a lot of breakdowns that manifest themselves through revolutions atypical for a particular part of the working cycle. But an attentive attitude to the tool will help diagnose them in time and return it to normal operation.

Chainsaw does not give maximum rpm

Posted by nicolight on Jun 1, 2008 in Gardening Equipment

Other chainsaw malfunctions

A lot of users are faced with a nuisance when the chainsaw does not slow down. The device reaches its maximum power in a matter of seconds, which cannot be reduced.

This may be due to the fact that:

  • The throttle valve does not function; its spring or traction element has weakened;
  • The toggle switch does not switch well;
  • Throttle shaft has lost its spin.

But there may also be a reverse situation when the saw gains power uncontrollably. The reasons why the chainsaw itself is gaining momentum should be sought in:

  • The carburetor must be cleaned or readjusted;
  • Fuel supply system, gas filter, fuel hose;
  • Malfunctions of cylinder-piston or branch pipes connecting them to the carburetor.

There are a lot of breakdowns that manifest themselves through revolutions atypical for a particular part of the working cycle. But an attentive attitude to the tool will help diagnose them in time and return it to normal operation.

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  • Walbro carburetor for the Ural chainsaw

    On the Ural 2t Electron chainsaw, the German carburetor from the Stihl MS 660 chainsaw, which is close in power, has proven itself well. Its fuel mixture supply is almost completely identical to the Ural 2t Electron engine. Perfect fit is achieved by adjusting the screws. Also, the fitting dimensions are almost identical (between the holes on the carburetor and the studs on the engine). The difference of 1 mm is eliminated by sharpening both holes with a file, each by 0.5 mm.

    It looks like a Walbro carburetor, which is put on a Ural chainsaw

    Modification of the Ural chainsaw carburetor: we eliminate factory defects

    Since the KMP-100 carburetor was the only one produced in the USSR, several million of them were produced. With such a mass and long-term production, the product could not be raw and unfinished. All the shortcomings were taken into account, modified already at the beginning of production, and the factory, constructive and technological, KMP-100 and KMP-100U had no shortcomings.

    The KMP-100U carburetor requires improvement when the engine from the Ural 2t Electron chainsaw is used for another purpose. For example, like a boat motor.

    In this case, not the carburetor itself is subject to alteration, but the idle speed control system located on the throttle handle.

    The Chainsaw Does Not Develop Speed

    The following actions can help:

  • Throttle cable check;
  • Inspection of the return spring, which could simply slip off;
  • Sealing the rear flap, which must be very tightly closed.

Usually one of these activities can make a huge difference.

Another technical problem is the situation when the chainsaw itself is gaining momentum, the reason for which is usually more than one. In this case, as well as under load, the saw may start to stall from time to time, preventing it from being fully used for its intended purpose.

The chainsaw is not gaining momentum what to do?

over, this phenomenon may be accompanied by the fact that the motor periodically does not start at all, it loses speed, and the load does not withstand more than idle. If you do not pay attention to this problem in time, you can lose it altogether due to severe overheating.

The main reason for this usually lies in the engine area, which is why it is worth taking a closer look there.

Other points that could lead to such consequences are:

  • Spark plug malfunctions;
  • Problems with the carburetor or simply incorrect adjustment.

The spark plug lends itself to visual diagnostics, therefore, if it is too dry or, on the contrary, very wet, and even with a significant coating on top, it is necessary, if not to replace it with a new one, then simply clean or dry it and try it outside the saw ignition system.

What to do if the chainsaw doesn’t slow down?

The opposite of the previous situation is when the gasoline tool very quickly reaches high powers and does not slow it down. In this case, it can be observed that this cannot be eliminated by either a screw on the body or by cleaning the carburetor. It would seem, what else is needed, the saw works, gives out power as in the instructions. But the trouble is that in this case, you need ten times more fuel than usual.

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All about the speed of gasoline saws

Modernization does not stand still. And the old chain chainsaws, which, besides being able to only saw through wood, emitting a terrible roar and vibration, heard almost for kilometers, are long in the past. Almost silent, sophisticated tools that are now a pleasure to hold in their hands have flooded the market, giving users a feeling of complete happiness and technical freedom.

But, to our great regret, no matter how detailed technically and visually advanced technology is, its breakdowns are quite frequent occurrences, which manufacturers speak about only by default. Chainsaws are no exception, multifunctional working units that require tremendous attention to themselves from the user in order to recognize the catch in time and stop the problem at the earliest stages.

The main such nuances usually relate to the moment of launch, which should be taken with full responsibility. Let’s look at the main processes that can occur with a chainsaw when the engine is turned on.

Regarding the carburetor, the source of malfunction can be:

  • Wear of piston components;
  • Littering it;
  • Breakdown of the air filter;
  • The use of gasoline with a low octane number and inadequate quality;
  • Damage due to vibration from the tool itself.

Each individual model is usually based on a 3-screw adjustment method, and the H screw will help to reach the maximum torque.

And yet, if the chainsaw does not develop speed, perhaps even the reason is not in itself, but in the time of year in which the work is being done. So, the minus marks of the thermometer are one of the factors that can completely knock down the chainsaw. Many users note that in severe frosts, even pouring hot oil does not help and the grease involuntarily solidifies on the tire. Ice coating of the carburetor and frost on it is also a fairly common thing. What can be done?

Reduce the use of the tool before the onset of the body, or if the design allows, change the damper mode from summer to winter, which is installed on individual models under the air filter cover.

At full speed

Sometimes the engine will stall after normal operation. To establish the cause, pay attention to the accompanying circumstances:

  1. Motor stalls in the middle of operation for no apparent reason. The starter is stationary and does not turn. It means that the tool is jammed and requires urgent repair.
  2. During normal operation, power is reduced in a short time and the engine stops, the cylinders are overheated. The situation indicates the occurrence of air suction under the rubber pipe between the carburetor cylinder, possibly due to a rupture. Air depletes fuel, nozzle replacement required.

The main elements of chainsaws

Before starting to delve into the issues of breakdowns and tool repairs, let’s first figure out what the chainsaw itself consists of. First of all, I would like to note that this tool belongs to the category of equipment, the operation of which directly depends directly on the internal combustion engine.

Single cylinder engine

It is also important that chainsaws are equipped with an engine with one cylinder, and the work of which is carried out on such kind of fuel as gasoline. It is worth noting that, despite the similarity with other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain transmission, through which the movement of the chain itself (saw) is made.

In fact, a chainsaw is a fairly simple design, but this does not prevent it from being reliable, practical and fully capable of providing direct uninterrupted and cyclical operation even in rather difficult conditions. This tool consists of a huge range of certain elements that are vital for its correct and productive work. This is a carburetor, a direct chain tensioner, a tire complete with a chain and other elements.

It is also important that Chainsaws are equipped with a single cylinder engine
, and whose work is done on a fuel such as gasoline. It is worth noting that, despite the similarities to other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain transmission through which the movement of the chain itself (saw) is made.

If you are on a tight budget, read the article about Russian chainsaw manufacturers.

Additional Tips

First of all, what you should remember when purchasing this kind of tool is that certain parts of the saw must be replaced with new ones after their service life (passport) has ended. It is for this reason that the instructions should always be at your fingertips, since everything is described in a detailed way there.

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Filter dirty

In order to solve this kind of problem, all you have to do is disconnect the (fuel) hose from the carburetor and pay attention to whether the fuel is leaking from it. Since if the mixture flows in a full stream, this means that the breather is not contaminated, but if on the contrary, then the cause of the breakdown has been found.

Here’s another reason why the chainsaw stalls when you press the gas muffler. It is this detail that can interfere with the full operation of the tool in cases where it is contaminated directly with exhaust resinous deposits. To do this, you just need to clean it.

Quite often, the Partner chainsaw stalls when pressed and the reason for this is the cylinder-piston group. Since by examining them, namely the piston and cylinder, you can easily determine the cause of the tool malfunction, directly by replacing them. You can also make a direct boring of the cylinder itself relative to the size of the new piston.

Many people ask themselves: why the chainsaw stalls when I press the gas? The answer may also lie in insufficient chain lubrication (see oil for the chainsaw chain), since the oil line may leak, or the direct channels may simply be clogged. That is why pay attention to the chain, because if it is dry, then, without delay, start cleaning the channels that supply oil directly to the tool tire.

If the tool turns off immediately after starting, it means that a breakdown of some device or part has occurred. To determine the reason, the mechanism is tested independently or in service workshops. Sometimes the reason that the mechanism does not start well is due to improper saw maintenance:

  • Insufficient amount of gasoline;
  • Poorly prepared fuel mixture;
  • Poor quality lubrication;
  • Muffler clogged with combustion products;
  • Unregulated carburetor;
  • Obstruction of the air filter;
  • Malfunction of the piston or cylinder.

Why does the chainsaw immediately stall and thrash when the gas is pressed

Saw repair after 10 tanks. What sellers are silent about.

Chainsaw Stihl MS 180 has some nuances that make owners nervous and is wasted on expensive.

Chainsaws are fairly reliable and simple designs. Therefore, if you properly care for them and handle them based on the manufacturer’s recommendations, then they fail well, very rarely and various kinds of breakdowns are quickly eliminated. But if you are faced with this situation and want to personally repair your tool without resorting to the help of professionals, then delve into the information provided below.

Chainsaw fuel tank

Therefore, the carburetor is directly involved in the preparation of the fuel-air mixture, the filter cleans the air from dust, the ignition unit and the spark plug create a spark, and there is lubricant in the gasoline.

That is why it is necessary to search for the causes of this kind of failure in a sequential order, starting directly from the simple ones and gradually moving on to the complex ones. And this is an important factor in the correct repair, since the person who, without thinking, begins to analyze the carburetor, brings it to risk. Since this kind of unit must be repaired or adjusted directly in special workshops (read about carburetor adjustment).

An important fact is that for the trouble-free operation of the tool, it is necessary to be quite careful about the fuel itself. Since if this kind of mixture is not prepared correctly, then most chainsaws will simply not start. Therefore, not every owner will guess to look for the cause of the breakdown in the fuel. That is why, in order for your tool to always work correctly, you need to use exclusively high-quality gasoline for the mixture.

Otherwise, overexposing the mixture directly in the canister will lead to the fact that it will lose all its octane properties and this will lead to significant problems with the instrument.

The chainsaw stalls when you press the gas due to the fact that there is no spark. This can happen when there is no good contact between the tip of the candle and the wire (high voltage). However, if this kind of connection works correctly, but there is still no spark, then the whole reason is the ignition unit (electronic). It is important to note that parts of this kind cannot be repaired, so they can only be replaced.

Do not forget that by examining the spark plug, you can get significant information regarding the breakdown of the chainsaw. Since if its surface is dry, then the reason for this is the cylinder, which is not directly supplied with fuel. That is why you will have to check the entire range of its presentation step by step.

Stihl 250 does not develop momentum