Do I Need A Running-In Chainsaw

New chainsaw will not start after running in

Sometimes, after the new chainsaw has been run in, the tool has stood for a while and has completely cooled down, attempts to start it do not give any results, it simply does not start. A common cause of this situation is the carburetor adjustment not carried out after running in. A lapped engine does not need enriched fuel for operation, and often this can cause fuel overflow, which in turn will affect engine starting. The following algorithm of actions will help to deal with this problem:

  1. Unscrew the candle and examine it. A wet candle is a confirmation of fuel overflow, for reliability it is worth immediately checking the spark plug in order to exclude other possible causes.
  2. Turning the chainsaw over and turning off the ignition, pull the starter handle several times, this is necessary to remove excess fuel from the system, which has accumulated there during unsuccessful start attempts.
  3. Put the candle back.
  4. Adjust screw H by screwing it in completely, then turning it out one turn.
  5. Run the tool.

As a rule, after carrying out the above actions, the chainsaw starts up and works without any deviations from the norm.

Chainsaw break-in

So how do you run in correctly and not damage the tool? We will try to answer the question in this article.

Running in a chainsaw engine after repair

If you figure it out, the parts installed during the repair, like the parts of a new tool, are run-in during the same period of time, which means that the conditions that contribute to this must be the same. This means that in order to successfully run the engine after overhaul, the following steps must be performed:

  1. Enrich the air-fuel mixture by unscrewing the screw H by ¼ from the position at which the maximum engine speed is reached, and for chainsaws that do not have the ability to adjust the carburetor, increase the amount of oil in the mixture with gasoline.
  2. Allow the engine to cool more often.
  3. After working for the first 4 hours, dilute the fuel mixture for household models of the tool according to the manufacturer’s instructions, and for models with carburetor adjustment, bring the maximum engine speed indicators, by adjusting the H screw, to normal.

Running your chainsaw correctly

To ensure a sufficient amount of lubrication, in the first 3 to 4 hours of tool operation, the leading manufacturers of chainsaws recommend enriching the air-fuel mixture by adjusting the carburetor. It is recommended to do this on professional and semi-professional chainsaws, with the H screw you need to lower the maximum number of revolutions by 600. 700 rpm.

Do I Need A Running-In Chainsaw

If it is not possible to check the revolutions using a tachometer, then the adjustment should be carried out as follows. Turn the screw H by 1/4 in the direction of enriching the fuel, while by ear, there will be a noticeable change in the sound of the engine at maximum speed and the amount of smoke from the muffler will increase. The engine is enriched with fuel if the screw is unscrewed, and depleted when it is tightened. After the run-in stage is over, it is necessary to fine-tune the carburetor with the obligatory use of a tachometer.

For those who have no experience in adjusting a chainsaw, it is better to contact a service center. It is worth noting that the adjustment of some household models of chainsaws is not possible, due to the fact that the carburetors of these models are not equipped with adjusting screws. For example, chainsaw Stihl MS 180, MS 180C.

Some chainsaws have slotted adjusting screws for special wrenches, which can only be found at an authorized service center. All these measures are aimed at preventing adjustment by inexperienced users.

The question arises, how to properly run in a household model of a chainsaw? How to set up without having a special key at hand? The answer is simple, you can reduce the proportion of the mixture of gasoline and oil, and try to let the tool cool down more often. This will increase the lubrication of rubbing engine parts, and reduce the risk of overheating in the first hours of tool operation.

Why do you need a chainsaw break-in

It is customary to call the process of grinding in the parts of the CPG by running a chainsaw. During the running-in process, the final formation of optimal clearances between the cylinder and the piston rings in the tool engine takes place. During the grinding process, the compression in the engine necessarily increases, which directly affects the maximum power and its behavior when starting.

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Optimal lapping of the ring surface to the cylinder allows more efficient transfer of the piston heat obtained from fuel combustion to the cylinder walls, which in turn prevents the possibility of its melting. From the definition of the process, it becomes clear how important this process is for the quality operation of equipment.

Failure to comply with the running-in conditions can initially reduce the tool’s working life, as well as its maximum power. In some cases, improper operation of the chainsaw in the first hours of operation can lead to engine jamming, freezing of piston rings, and the formation of thermal scoring on the chainsaw cylinder.

For this reason, in the first hours of operation, it is necessary to ensure a gentle engine operation. But you shouldn’t get too carried away with facilitating the conditions for the instrument. For example, on the pages of the Internet you can find recommendations for running in a gasoline tool, which indicate that the engine should be run in at idle speed. This statement is fundamentally wrong, since the operation of even a normally run-in engine at idle for a long time is not recommended due to excessive formation of carbon deposits.

In idle mode, the engine crankshaft rotates at minimum speed. Cooling of a two-stroke engine directly depends on the number of its revolutions, since the flywheel is directly connected to the crankshaft.

Cooling is increased in proportion to the increase in engine speed. It follows from this that in operating mode, the motor of the tool will be cooled no worse.

Compliance with the running-in conditions allows you to do without problems with the tool in the first hours of its operation. What is required for the correct running of a chainsaw?

Chainsaw chain and tire running

For normal operation of the new bar and saw chain, there is no need for running-in, since there are no parts that need to be lapped. On the contrary, the design of the guide bar is made in such a way as to reduce friction due to its abundant lubrication. For work, just install the bar and chain on the saw, check and, if necessary, adjust the tension.

Lubrication of the rubbing elements of the tire and chain is carried out using a special adhesive oil, which is supplied to the tire by an oil pump. When working, it is worth using oil with a high degree of adhesion, since it creates an oil film along the entire length of the tire, and not only in the upper part.

The design of the pump is designed in such a way that as the engine speed rises, the amount of oil supplied for lubricating the chain increases. Some tool models are equipped with a special adjusting screw that allows you to adjust the supply of lubricant to the chain.

Fuel and lubricants

When running in a chainsaw, and in the process of its further operation, it is very important to use high-quality fuels and lubricants. When preparing the fuel mixture, use high-octane gasoline AI-92, 95.

It is not recommended to refuel the chainsaw with gasoline that has been stored for more than 2 months. Pay particular attention to engine oil. It must be of high quality and designed for air-cooled two-stroke engines.

When running the chainsaw, use a fuel mixture prepared in a ratio of 1/25, unless otherwise specified in the chainsaw manual.

The second run-in stage uses the same oil, but the fuel mixture ratio changes by 1/40. 1/50, depending on the manufacturer’s recommendations and the characteristics of the oil.

We recommend using only special chain oils for filling the automatic lubrication system. It is forbidden to use diesel oils, waste fluids, spindles and other surrogates as a lubricant.

Overview

Overview of errors when running in a chainsaw

Review of running a Chinese chainsaw

Household run-in

Most of the Chinese chainsaws are in the budget category, which means less quality control and the use of less wear-resistant materials in their production. All this forces the user to run in their instrument immediately after purchase.

Factory run-in

As we have already noted, well-known manufacturers of chainsaws prepare their product for work directly at the factory. Preparation for operation consists in running-in the piston group using a specially developed technique. This process is carried out and controlled during the factory testing of the product.

Also, do not forget that most chainsaws from world brands are equipped with chrome-plated pistons, which significantly enhances their durability. The question arises. Should they be run in before starting operation? Most well-known manufacturers consider running in their chainsaws optional, but they recommend running out several fuel tanks (7. 9) in a gentle mode, without overloading the chainsaw and without overheating the engine.

Manufacturer’s warranty obligations. Chainsaw break-in. Review, device, main mistakes

Preparing for the first launch

Preparation for the first start is carried out by visual inspection of the tool, checking the correct assembly and installation of all parts of the chainsaw.

The first start of the chainsaw is carried out according to the following approximate scheme:

  • After preparing the fuel mixture, pour it into the tank;
  • The brake lever is retracted, putting the chain brake in the inoperative position;
  • Open the air damper;
  • The ignition is turned on;
  • Holding the chainsaw by the handle with one hand, pull the starter cord with the other hand;
  • When the engine starts, press the acceleration button and wait until the saw reaches full throttle, and then release it until idling.
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Factory and household chainsaw running-in

Break-in is conventionally divided into two types: household, carried out by the owner of the chainsaw after purchase and factory, which the tool goes through after production and assembly at the manufacturer.

Factory run-in is carried out by the manufacturer. During this period, the piston group is run-in, and all the parameters of the chainsaw are controlled by specialists. High-end chainsaws are typically fitted with chrome plated pistons for longer life and increased wear resistance.

Carburetor adjustment

For stable operation of the chainsaw, sooner or later, carburetor adjustment will be required. We draw your attention to the fact that the carburetor adjustment, while the saw is under warranty, is carried out by the specialists of the service center.

After the saws are wound, adjusting screws are used to adjust the carburetor.

Figure 1. Location of carburetor adjusting screws.

The sequence of actions when adjusting the carburetor:

  • After starting, the screws L and H are turned until they stop, and then each of the screws is unscrewed one and a half turns in the opposite direction;
  • Then let the chainsaw run for about 5-10 minutes;
  • Idle is set with screw T;
  • If the setting is correct, the chain will not rotate on the bus at idle.

In what cases it will be possible to return the chainsaw under warranty

Your chainsaw can be returned under warranty if:

  • After assembly and before starting work and the first start-up, you noticed a manufacturing defect (chipping, an influx of plastic or metal, etc.) on the body or the saw part of the chainsaw;
  • The integrity of the warranty stickers on the case has not been violated;
  • If 14 days have not passed since the purchase;
  • If documents for the instrument, such as purchase receipts, instructions and warranty card, have been retained by the buyer.

Overview

How to run in correctly?

Chainsaw break-in. Recommendations and features of running in chainsaws

Chainsaw break-in

Before using a new saw, it is advisable to run it in. The tool goes on sale, as a rule, not run in, therefore, according to experts, it is worth spending a little time to provide the saw with a long operational life.

Features of running a Chinese chainsaw

There are no significant differences in running-in Chinese-made chainsaws. For example, Stihl chainsaws are made in China, although the delirium was originally collected in Germany and is still German. Chinese models, like European ones, are equipped with carburetor adjusting screws, therefore, during running-in, you can adjust the speed and prevent the tool from operating at maximum. Then, accordingly, adjust the carburetor as required by the instructions.

Preparatory work for the first launch

Preparation for start-up is the preparation of a fuel mixture and a visual inspection of the chainsaw. Make sure that all mechanisms are working and adjusted. Then proceed according to the following plan:

  • Pour the prepared mixture into the tank;
  • Disengage the chain brake;
  • Open the air damper;
  • Switch on the ignition;
  • Pull the starter handle to start the engine;
  • After turning on the saw, press the gas button and wait until the saw picks up speed, then switch to idle.

Recommendations for the initial run-in phase

The run-in is divided into several stages: preparatory, run-in itself, and final. At the preparatory stage, it is necessary to make sure that the bar and chain are lubricated. over, special oil is used for lubrication. Do not run-in at idle speed, otherwise it may damage the tool, as oil does not flow to the chain.

Frequent question: “How long do you need to run in?” Chainsaw running-in lasts 5-7 hours. Upon completion of this process, the remaining fuel mixture must be drained and a fresh portion must be refilled. It is not recommended to give the saw the maximum load during the first 5 refills, and also exceed the standards for the diameter of the logs established by the manufacturer.

On this topic. Features of fuel composition

Chainsaws are usually equipped with two-stroke engines that use a mixture of gasoline and oil as fuel. It is necessary to prepare the mixture according to the instructions that are attached to each tool. But for most chainsaws, the ratio of oil to gasoline is 1:40. The gasoline used must be at least AI-92, otherwise it will damage the tool. Oil must be filled for two-stroke engines only.

How to properly run a chainsaw?

The running-in process for a chainsaw is very important. It is on it that the quality of the running-in of key parts of the chainsaw engine depends, as well as the further operation of the tool in various conditions.

To properly run in a new chainsaw, the owner needs to remember several important points:

  • Running-in is not the same for saws from different manufacturers;
  • Chainsaws of various production differ in engine brands, percentage of the fuel mixture, which means they need a unique run-in;
  • It is important to establish at what stroke of the chainsaw the running-in is performed. At cyclic or idle (this information must be indicated in the instructions, which must be read before starting work with the chainsaw).
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An example is the Husqvarna chainsaw. Its break-in is always done only on a cyclic stroke! In this case, the engine must operate at high speeds, but with low power.

Running in tires and chains

The heading is placed in the text only because many are looking for that too. For those who came to the site for this request, we inform you: there is no need to lapping the bar and chain. Simply because it is impossible: there is no stable contact. The main guarantee of long-term stress-free operation is sufficient chain lubrication. It is achieved by adjusting with a special screw on those saws on which it is provided.

Features of running in Chinese chainsaws

In general, the process of running in Chinese saws is not much different from running in branded chainsaws from well-known manufacturers, especially when it comes to new generation saws made at modern Chinese factories.

When running a Chinese chainsaw, we advise you to pay attention to:

  • Oil quality (do not use cheap oils and lubricants, Chinese chainsaws are sensitive to cheap fuels and lubricants);
  • It is undesirable to adjust the carburetor yourself even after the end of the warranty;
  • If some part can be replaced, replace without a doubt, Chinese chainsaws are hard to repair, and installing a new part will save you the time it takes to work with a chainsaw.

We recommend watching from owners of chainsaws of similar models to get a better understanding of the nuances of the work of Chinese chainsaws.

Carburetor adjustment

For stable operation of the chainsaw, sooner or later, carburetor adjustment will be required. We draw your attention to the fact that the carburetor adjustment, while the saw is under warranty, is carried out by the specialists of the service center.

After the saws are wound, adjusting screws are used to adjust the carburetor.

Figure 1. Location of carburetor adjusting screws.

The sequence of actions when adjusting the carburetor:

  • After starting, the screws L and H are turned until they stop, and then each of the screws is unscrewed one and a half turns in the opposite direction;
  • Then let the chainsaw run for about 5-10 minutes;
  • Idle is set with screw T;
  • If the setting is correct, the chain will not rotate on the bus at idle.

Running your chainsaw correctly

To ensure a sufficient amount of lubrication, in the first 3 to 4 hours of tool operation, the leading manufacturers of chainsaws recommend enriching the air-fuel mixture by adjusting the carburetor. It is recommended to do this on professional and semi-professional chainsaws, with the H screw you need to lower the maximum number of revolutions by 600. 700 rpm.

If it is not possible to check the revolutions using a tachometer, then the adjustment should be carried out as follows. Turn the screw H by 14 in the direction of enriching the fuel, while by ear, there will be a noticeable change in the sound of the engine operation at maximum speed and the amount of smoke from the muffler will increase. The engine is enriched with fuel if the screw is unscrewed, and depleted when it is tightened. After the run-in stage is over, it is necessary to fine-tune the carburetor with the obligatory use of a tachometer.

For those who have no experience in adjusting a chainsaw, it is better to contact a service center. It is worth noting that the adjustment of some household models of chainsaws is not possible, due to the fact that the carburetors of these models are not equipped with adjusting screws. For example, chainsaw Stihl MS 180, MS 180C.

Some chainsaws have slotted adjusting screws for special wrenches, which can only be found at an authorized service center. All these measures are aimed at preventing adjustment by inexperienced users.

The question arises, how to properly run in a household model of a chainsaw? How to set up without having a special key at hand? The answer is simple, you can reduce the proportion of the mixture of gasoline and oil, and try to let the tool cool down more often. This will increase the lubrication of rubbing engine parts, and reduce the risk of overheating in the first hours of tool operation.

Chainsaw break-in. Everyone gets it wrong!

After reading on the Internet tips on how to properly run a chainsaw, many begin to spoil their device, significantly reducing its service life.

Fortunately for the owners, and especially for those who give harmful advice, damage caused by improper running is not immediately noticeable, since it is very difficult to spoil a new device at once. Therefore, in appearance everything is fine, and breakdowns and repairs will happen later, everything will be blamed on marriage, bad gasoline or manufacturer defects. Do not repeat other people’s mistakes! However, about everything in order.