DIY Chainsaw Champion 137 Adjustment
How to adjust the carburetor on chainsaws
To understand how to properly adjust the carburetor on a chainsaw, you need to see it, and therefore we invite the reader to pay attention to the example below.
To make the adjustment, you only need a slotted screwdriver, however, it will not be possible to perfectly fine-tune the carburetor without a tachometer (of course, if the person is not a minder or a professional driver with experience). Now let’s try to understand how to set up the carburetor in a given situation.
How does a chainsaw carburetor work, on what principle does it work
Modern car engines are no longer equipped with a carburetor. Meanwhile, before, almost every driver knew how to adjust it. Today, chainsaws with injection engines have already begun to appear on sale, however, carburetor models will hold the palm for a long time, because their cost is 5-15 times lower than that of the modernized version.
The carburetor consists of several main parts:
- aluminum body;
- diffuser and air damper at the inlet;
- nozzles (valves for adjusting the fuel supply);
- atomizer (it is he who provides injection);
- fuel (float) chamber.
The principle of operation of a chainsaw carburetor is quite simple. Fuel is supplied continuously, and its quantity is regulated by jets. Air enters through the air damper due to the air vacuum generated by the piston. The diffuser mixes fuel and air. It is this fuel-air mixture that enters the cylinder, forcing the engine to work.
How to set up a chainsaw carburetor if it won’t start at all
Quite a common problem in those cases when the “master” from the “I know everything” series tries to get into the settings with hands that do not grow from the shoulders. In such a case, there are standard screw positions from which you can “dance” further. First, you need to completely tighten both screws (do not overdo it). Then unscrew:
- screw L. one revolution;
- screw H. one and a half turn.
With regard to the idle screw, the throttle must first be completely closed (screw T unscrewed). After that, it must be cranked one and a half turns clockwise and try to start the engine. If it did not work out, it is gradually added by a quarter of a turn before starting. When the engine starts to work, the position of the idle screw is adjusted so that the internal combustion engine does not stall, but the chain is still in place.
A machine for sharpening chainsaw chains: selection criteria, design features, technical and operational characteristics of equipment, the principle of operation of manual and automatic devices, an overview of popular models of sharpening installations.
Determining the need to adjust the carburetor on a chainsaw
Before you start adjusting the carburetor on a chainsaw, you need to make sure that it is generally required. It would seem an absurd phrase. However, in 90% of cases, when an inexperienced craftsman considers such an action necessary, the unstable operation of the instrument is associated with other reasons, including:
- problems in fuel lines and filter. blockages, depressurization;
- malfunction of the exhaust system;
- clogged or damaged air filter;
- unstable operation of the ignition system;
- violation of the tightness of the crankcase of the internal combustion engine.
Only if these problems are excluded, and the engine is unstable, it is safe to say that carburetor adjustment is required.
How to sharpen a chainsaw chain: tooth configuration and sharpening angle, templates and tools for sharpening, the frequency of the procedure; how to sharpen a chainsaw chain at home with a file, using an angle grinder, on a machine, additional recommendations.
Mechanic at home: adjusting the carburetor of a chainsaw with your own hands
Any internal combustion engine requires periodic maintenance, It doesn’t matter if it is the engine of a simple moped or a powerful multi-ton tractor. Such a tool as a chainsaw was no exception. After all, it is equipped with a single-cylinder two-stroke internal combustion engine, which also requires serious maintenance, although it is much easier to perform the necessary actions here. In today’s article we will talk about how to adjust the carburetor of a chainsaw with our own hands, find out how difficult it is, and figure out whether you need to be a professional mechanic to do this kind of work.
How to correctly and accurately adjust the carburetor: step by step instructions
In order to make the information easier to perceive, we propose to consider it on the basis of photo examples with a description of actions in tabular form. The basis is a chainsaw with initial settings.
You can learn more about the master class on adjusting the carburetor of a chainsaw in this video.
Maximum number of revolutions
To limit this figure, you need to use the screw marked H. To increase the number of revolutions, turn it clockwise, and to decrease them in the opposite direction. The maximum frequency should not exceed 15000 rpm.
If you increase this indicator, the engine of the device will work for wear, which will lead to problems in the ignition system. When rotating this screw, you must take into account the ignition processes of the device. If the slightest glitches appear, then the maximum speed value must be reduced.
A little research needs to be done. Device acceleration is initiated. The serviceability of the engine should be assessed during the maximum revolutions. Champion 142, characteristics, purpose and instruction manual. Champion 142 carburetor adjustment. When the engine is functioning properly, when you press the accelerator, the speed quickly increases to 15,000 rpm.
If this does not happen or the increase in speed is too slow, you must use the screw marked with the letter L. It turns counterclockwise. Moderate movements must be observed, since the turn cannot be more than 1/8 of a full circle.
Before this procedure, it is necessary to perform a full adjustment of the components of the carburetor when operating at maximum speed. Next, you should check the functioning of the device in idle cold mode. Self-repair and carburetor adjustment. Champion 142 Chainsaw Champion 55. When the correct settings are achieved when adjusting, you will notice that the carburetor design matches these criteria:
- When the idle cold mode is connected, the chain does not move.
- When the accelerator is pressed even slightly, the engine picks up speed at an accelerated pace. With a gradual deepening of the pressure, you can see that the engine speed increases commensurately, reaching the maximum allowable values.
- When the engine is running, you can compare its sound to a four-stroke device.
If violations are noticed in the above parameters or the device has not been completely adjusted, you need to perform the main setup step again. Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.
Correctly adjusted chainsaw carburetor ensures efficient operation at full power with the most economical fuel consumption.
The need to adjust the carburetor of a chainsaw arises infrequently, since the adjustment is initially carried out by the manufacturer to achieve optimal operation. The adjusting screws are designed for more accurate adjustment of the chainsaw carburetor, if necessary.
When and why does this need arise??
Among the reasons for the failure to fix the adjusting screws, the most common are the following:
- Strong vibration or damage to the protective cover. It rarely happens, but it does happen.
- Serious engine wear (piston). Of course, in this case, you should take more care of repairing the chainsaw engine, but still adjusting the carburetor can improve its functionality for a while.
- Clogged carburetor due to damaged air filter, poor quality gasoline, or scale formation. In this case, in addition to adjusting the carburetor, flushing it cannot be avoided.
What signs indicate the need to adjust the chainsaw carburetor?
- Firstly, the engine does not start, or it does start, but then it stalls. This is most often due to a lean fuel mixture.
- Secondly, a significant increase in fuel consumption and exhaust emissions. An increase in exhaust emissions indicates that the fuel does not burn completely, which means that the cause may be oversaturation of the fuel mixture.
The chain saw carburetor adjustment scheme may differ slightly depending on the manufacturer (the process of adjusting the chainsaw carburetor of a particular brand and model is described in detail in the operating instructions), but the general principles remain the same for all brands. The purpose of the saw adjustment is to change the quantity and quality (richness) of the fuel mixture supplied to the engine cylinder.
To find out how to adjust the carburetor on a chainsaw, you should learn to distinguish between three screws (some models have only one).
The L and H screws are similar only in appearance, in fact they are different
Each screw has its own letter designation:
- “L” is for setting low rpm;
- “H” is needed to adjust the upper speed;
- “T” is needed to adjust the idle speed (for models with one screw, only it is present).
There are mandatory safety requirements that must be observed when adjusting the carburetor of any chainsaw:
- Make sure the chain is facing away from you.
- The saw must be firmly positioned on a level surface, and its cutting edge must not touch any objects.
Please note: the exact values of the angle of rotation of the adjusting screws can be found in the operating instructions for your specific model of chainsaw. Strict adherence to the manufacturer’s instructions will help you avoid engine damage.
The process of tuning the carburetor of a chainsaw consists of two stages: basic (engine off) and final (running warm engine).
When the gas flow moves through the diffuser, its
the speed increases, and a vacuum (low pressure) occurs. In a chamber with a float, the fuel is at atmospheric pressure. Due to the difference in pressure values, the fuel rushes into the air chamber, where it mixes with air.
The volume of the supplied air-fuel mixture is regulated by the location of the air damper. With a larger opening, more fuel comes in. the engine speed increases.
- increased fuel consumption;
- increased exhaust, manifested in the appearance of black smoke;
- unstable operation or engine failure immediately after starting. the fuel mixture has become lean;
- the engine does not start;
- there are interruptions in the operation of the engine (another reason is the clogging of the carburetor);
- wear of the piston group. repairs will be required, since adjusting the carburetor is a temporary measure;
- there was a strong vibration when the engine was running;
- there was a misalignment of the carburetor setting.
Chainsaws “Partner-350” are required in rare cases, most often problems arise, expressed in improper fuel intake or engine wear. But there are signs that the mechanism needs to be adjusted, here are some of them. After you managed to start the engine, it immediately stalls.
In some cases, users cannot start it at all, and the reason lies in a lack of fuel or an overabundance of oxygen. The problem can arise in the event of an increase in fuel consumption, the result is an increase in the volume of exhaust gases. This can happen due to oversaturation of the mixture with fuel.
If you will be adjusting the carburetor of the Partner-350 chainsaw, you should familiarize yourself in more detail with the device of the unit, in many models the design features almost do not differ from each other, so the recommendations given will be relevant.
The elements must be removed with the utmost care, putting them in order; this will help you during the assembly process. Three bolts hold the top cover, they need to be removed, then you will see a layer of foam rubber, which acts as an integral part of the air filter. The technician will need to get rid of the fuel hose, this will remove the drive rod.
Adjustment of the carburetor of the Partner-350 chainsaw is impossible if you do not remove the tip of the cable, this should be done in the next step. The gasoline hose, which is to the left of the fitting, will need to be thrown off. All of the above work will allow you to disconnect the carburetor, which can be adjusted.
In order to understand how the Partner-350 chainsaw is adjusted, it is best to familiarize yourself with the device of this unit in more detail at the first stage. If you understand the principle of operation and the constituent elements, you will be able to independently determine the cause of the breakdown. The carburetor acts as one of the main parts of the engine, which is necessary for the preparation and subsequent supply of fuel, the latter consists of fuel and oxygen. If the ratio of these ingredients is violated, then the motor may start to work incorrectly, and subsequently fail.
If you have purchased a Partner-350 chain saw, carburetor adjustment may be required during operation. In order to perform these actions correctly, you must also familiarize yourself with the principle of operation of this piece of equipment. The fuel is atomized in the diffuser by a jet of air, which creates a mixture that is forced into the cylinder.
You can adjust the carburetor of the chainsaw without any disassembly at all; in rare exceptions, you just have to remove the air filter cover. There is a considerable amount of contradiction here: on the one hand, the chainsaw is designed for unhindered access to the adjustment mechanism, on the other, it is recommended to use it as little as possible.
True, experienced fellers and sawers always carry a flat screwdriver with a long blade and periodically adjust the carburetor. The explanation is simple: when making a chainsaw, its carburetor goes through a rough adjustment, designed for a certain composition of air and fuel. It is clear that the conditions at the place of work are different from the bench.
When changing the brand of gasoline or, for example, increasing the humidity of the air, an experienced user of the chainsaw will always adjust the quality of the mixture for higher performance and less wear on the piston part. But this, we repeat, requires a lot of experience with a specific chainsaw and knowledge of the features of its behavior. In addition, the adjustment is incredibly fine. the screws are tightened by only 1/10. 1/20 of a turn.
Another reason for adjustment is the repair or replacement of the carburetor. In any case, adjusting the quality of the mixture should be carried out only if the serviceability of the carburetor is reliably known (there is no debris, the gaskets are not poisoned), the air filter is clean, the spark plug, clutch and ignition system are in perfect order. Otherwise, there is a high probability that the malfunction will be eliminated at one point and the adjustment will suddenly become incorrect, and the engine will start to work for wear.
Step-by-step disassembly of the carburetor
The process of disassembling the carburetor plays a huge role in how to adjust the carburetor on a chainsaw. The carburetors of various chainsaws do not fundamentally differ from each other, for this reason, we will consider the disassembly of the Partner chainsaw. All elements must be carefully removed and folded to facilitate the next assembly process.
Removing the top cover is done by removing 3 bolts. After that, the foam rubber, a component in the air filter, is dismantled. The indicated bolts are marked in red in the figure.
After that, remove the fuel hose and drive rod. The upper indicator indicates the fuel supply hose, the lower indicator indicates the link in the drive
Now we move on to removing the cable end. The arrow points to the tip to be removed.
On the left side, we dismantle the gasoline hose.
We make the final disconnection of the carburetor, now it can be adjusted. The carburetor has a rather complex mechanism, for this reason, if there is a need for further disassembly, you need to carefully remove the elements, since they are small and easy to lose.
Checking and adjusting the chainsaw carburetor
Saw carburetor tuning and minor repairs can be done without experience, but in order to do it correctly, you need to follow the algorithm described in the attached documentation. However, you should not overestimate your strengths, because sometimes it is cheaper to pay a specialist for quality service than to eliminate the consequences of your unprofessional repair.
To check the crankshaft oil seals for air intake in the absence of a special tool, the following procedure can be used.
Remove the flywheel, clutch and carburetor from the chainsaw, then pour kerosene into the crankcase with a syringe (if there is no kerosene, then you can use a fuel mixture), you need to visually check the oil seals for leaks. If there are stains, the oil seals are defective and must be replaced.
Every carburetor owner should have the necessary tools to adjust this system. There are three adjusting screws that are located on the body of the device. They have their own markings:
- L. screw for low speed correction.
- H. screw for high speed adjustment.
- T. regulates the idle speed, in most cases it is used for experiments.
Before adjusting the carburetor, you need to prepare the device:
- The engine warms up, that is, it starts about 10 minutes before the repair, and turns off when you start work (see how to start the chainsaw).
- The air filter is checked and washed.
- The chain is stopped by turning the screw T as far as it will go (see chain oil).
To carry out a safe repair, you need to prepare a flat surface where you can carefully position the device, and turn the chain in the opposite direction. Adjustment of the champion 142 carburetor. The Champion 142 chainsaw includes. We need a tachometer. It determines the presence of a violation in the operation of the carburetor. When the screws are turning, the sound should be perfect and absolutely smooth. If you notice squealing notes, then the mixture is oversaturated.
Carburetor adjustment is divided into two main steps. The first is called basic. How to tune the carburetor on a chainsaw husqvarna 142 husqvarna. It is performed with the engine running. The second is performed when the engine is warm.
To carry out the procedure for setting up the carburetor successfully, you need to read the operating instructions for a particular model in advance to identify additional features of setting up the device.
How to adjust the carburetor on a chainsaw yourself, adjusting the carburetor, adjusting the carburetor on.
Chainsaw Champion in the 137th modification is distinguished by a good supply of traction and torque. The basis of the complete set of gardening tools consists of a 2-stroke gasoline 1-cylinder engine with a forged piston, which received an increased stroke range, as well as a chrome-plated cylinder with a volume of 37.2 cm3.
Chainsaw Champion 137 is equipped with an enlarged Japanese brand Walbro carburetor with metal jets and an improved float that allows you to precisely control the amount of fuel supplied to the engine. For simplified starting of the built-in cold internal combustion engine, the model is equipped with a transparent plastic pump for pumping fuel into the cylinder.
Champion has included in the basic equipment of the 137th model a modified anti-vibration system, consisting of 6 metal springs. When the engine is running at the maximum permissible speed, the springs take over the vibrations of the crankshaft. Thanks to this, vibration on the handles of the model is practically not felt.
The Champion saw headset includes a metal bar and chain. For self-tensioning of the chain by the operator, the manufacturer has included a side sprocket with the garden tool. The chain is lubricated fully automatically using an oil pump. To add the oil required for the operation of the headset, a separate 210 ml tank is included in the chainsaw device.
To protect the interior from dust, sawdust and shock, Champion has equipped the 137 with a durable, reinforced plastic casing. Individual parts can be removed for self-repair and quick replacement of consumable parts.
At the rear of the saw body, the manufacturer provides all the controls necessary for work. This allows the operator to adjust the operation of the garden tool directly while cutting wood without the need to turn off the chainsaw engine.
There are several occasions when you need to tune your Champion’s factory carburetor.
Their list includes:
- wear or formation of defects in the engine’s CPG;
- a sharp increase in motor vibration;
- arbitrary shutdown of the engine;
- increased fuel consumption and an increase in the volume of exhaust gases;
- carburetor blockage.
Homemade 136 Husqvarna fuel adjustment tool
Champion 137 does not have any design features, everything is made as simple and cheap as possible. The engine is normal. two-stroke, carburetor diaphragm, starter without additional springs, but this does not mean that the chainsaw is bad. It’s nice to hold it in your hands, and it starts out no worse than Husqvarna’s home model, for example, 236.
Small improvements are still available, this is an additional fuel pump, which is designed to facilitate starting after a long period of inactivity, as well as a chain tension regulator mounted on the side cover, which is very convenient.
In the latest versions of Champion 137, the manufacturer has added a top hatch cover, through which you can access the air filter and spark plug without using any additional tools. Conveniently? Of course, this is convenient, because before it was necessary to check the cleanliness of the air filter, unscrew the 4 screws securing the top cover, and completely remove them.
The saw controls are made as simple as possible, there are no combined levers and others. Separate choke control lever, which is mounted on the housing to the right of the rear handle. Reliable and inexpensive push-button ignition switch.
At first glance, it is clear to the saw that this is a no-bloat budget option. Below you can see the video test of the Champion 137 saw.
Chainsaw characteristics Champion 137
Champion 137 cannot boast of excessive power or cutting speed. Compared to chainsaws in the household segment, its performance is average.
Motor power 1.55 kW, top speed 12500, this is good performance, but still some home models give a little more.
The main problem that arises during the repair is the lack of the necessary information on how to carry out the repair. This is due to the fact that many foreign manufacturers believe that the saw should be disposed of after a certain period of time and use up. Therefore, many craftsmen have certain doubts, especially when repairing budget models.
But expensive professional models also create certain difficulties:
- The first problem is to supply expensive spare parts.
- For the maintenance and repair of some units, special equipment is useful.
In addition to the aforementioned clogged breather, other fuel supply problems may occur. The main obstacles can be:
Littering of the fuel filter. To check the device for this malfunction, you need to disconnect the fuel hose and see how the fuel flows. If the jet is weak, the filter may need to be cleaned. The filter device is removed through the filler hole of the tank and cleaned out, if the contamination is too strong, it is changed.
Professionals recommend changing the filter every few months, regardless of contamination.
Lack of fuel. In this case, the problem may lie in several factors. The first is the contamination of the air filter. The problem is that there is not enough air being delivered to the carburetor, which results in poor engine performance. The filter must be removed, cleaned, rinsed and dried, and then put back.
The second reason is an unregulated carburetor. It, that is, the adjustment is carried out with three screws.
And the last reason is a problem with the integrity of the membrane or contamination of the carburetor channels. As in other cases, it is necessary that the components are dry and clean.
Chain and piston mechanism
Some parts are more stressed during operation than others. These elements include a chain, sprocket, bearings, tire, anti-vibration components, piston assembly. Such elements are only subject to replacement. However, the chain can be sharpened and the cylinders can be bored. It all depends on the degree of their wear.
If you find an error, please select a piece of text and press CtrlEnter.
A chainsaw is an indispensable tool in the life of a DIYer. With it, you can saw off an old tree, build a bathhouse or just a gazebo for relaxation. Sometimes this tool also becomes unusable. To solve the problem, it is not necessary to contact expensive specialized services, you can repair the chainsaw with your own hands.
Chainsaw design and general classification of faults
Correctly find the source of the malfunction, as well as perform the correct and sound repair of chainsaws, for this you need to have a reliable idea of its technical specifics. Repair of such equipment is not particularly difficult. Its schematic structure is quite simple. For convenience, the nodes in its composition can be divided into three types:
- the main and very important element, without which further work is impossible, is a two-stroke engine running on gasoline. Acceptable brands of gasoline are indicated in the passport of the device itself;
- the second no less important component is its working part, which is responsible for sawing the materials themselves. These include sawing mechanisms;
- the third connecting unit includes a system for supplying and filtering fuel, oil, engine ignition, exhaust gas removal, etc.
Chainsaw engine malfunction
Malfunctions are classified into two nodes:
- Malfunction of the engine itself. It cannot start, for no reason it stalls, it gets too hot, it smokes very much, it works unstably with minimum and maximum load. Therefore, repairs need to be carried out on these nodes.
- Peripheral problems. Here you can identify many symptoms for which there are malfunctions in her work. For example, if the chainsaw stalls during operation or if power is lost, then there may be a blockage in the gasoline supply system or filter. If it does not cut well, then the chain may just be blunt. Repair should begin with the study of auxiliary components, which will require the least amount of time and money.
For convenience, before starting repairs, you should divide the chainsaw into sectors and look for a malfunction directly where a problem is expected. The manual also provides a brief description of possible breakdowns and how to fix them.
It should also be borne in mind that several factors can be sources for the same malfunction. Therefore, it is important to be able to diagnose the cause of a breakdown in order to carry out repairs in the future correctly and efficiently. Before you start disassembling and repairing the chainsaw, you should estimate the possible reasons and try to work only with them.
What is required to eliminate breakdowns
Chainsaw repair does not require a large arsenal of home tools. First of all, these are:
- screwdrivers. Cross and flat to remove the casing, chain or other components that are fastened with flat bolts and will definitely be needed in order to carry out high-quality repairs to the chainsaw;
- a set of spanners and wrenches of different sizes. You will need them when disassembling the engine and other moving parts. Repairing such parts sometimes involves dry cleaning, so they will be needed to scrape off excess dirt;
- a key for removing a candle;
- the diagram of the chainsaw itself, in order to know how certain units work and how to properly maintain them.
Calibration algorithm and safety precautions when troubleshooting chainsaw carburetor
Calibration or fine adjustment of the carburetor should be performed strictly as recommended by the chainsaw manufacturer. Often this procedure has already been done during the assembly phase in the assembly shop. Chainsaw repairs, however, sometimes involve adjusting the carburetor. This is due to its incorrect operation for technical reasons, failure of settings, etc.
Fine adjustments are made with three bolts:
- bolt “L” regulates fuel delivery at low speeds;
- bolt “H” regulates the maximum fuel supply to the engine;
- bolt “T” adjusts the fuel delivery at idle.
There are two types of carburetor settings:
- basic or basic. Executed with the engine off;
- accurate or final. Runs on a warm engine.
First, the bolts “H” and “L”, which regulate the supply of the fuel mixture at high and low speeds, respectively, are tightened counterclockwise to the stop. Then turn them one and a half turns clockwise. It is advisable, before starting the procedure, to mark the initial position of these bolts with a pencil or felt-tip pen, so that later they can be returned to the position in which they were before if there are problems with adjustment. The fact is that with an unskilled approach to adjustment, it is possible to finally kill the engine.
Further adjustment takes place with the engine warmed up to the desired temperature. It is left working for 10 minutes. Further, they are already fine-tuning the idle speed adjustment bolt. It is turned until the engine (its speed) reaches its lowest values. The motor must run stably and the chain must remain in place (not rotate).
Then you should check how quickly the momentum is gaining. To do this, slowly turn the low speed bolt another eighth of a turn. The maximum possible speed can be set using the tachometer and adjusting the bolt “H”. Next, you should once again check the operation of the carburetor at idle speed.
DIY Champion 137 chainsaw repair
Question: I bought and work with a Champion 137 chainsaw and problems started on the first day.
After 10 minutes of sawing (medium load), the saw stopped gaining momentum.
The saw suffocates when gassed. After diagnostics in the village. c. the problem repeated itself. Keeps idle speed normally. What could be the reason?
Answer: Most similar to dirt in the carburetor or defects in workmanship / assembly.
Question: Problem with Chainsaw Champion 137-16, gasoline does not flow into the hot carburetor.
Symptoms. there is only air in the fuel supply button (aka nipple). If you start a hot saw (a lot of nipple pokes), then the saw will work and gasoline will flow.
As the tank runs out or the saw stops for a couple of minutes, then again there is no gasoline from the carburetor. On the cold, everything shakes and everything comes in. cleaned all filters.
I checked the fuel flow by removing the hose from the carburetor. the jet is good. what could be the problem and how to fix it?
Answer: I have never met a situation that the valves would stop working on hot, at least at the primer of the carburetor and then resumed work after cooling.
Take it to the service, according to your description, the malfunction cannot be localized.
The primer either shakes or not, there is no other way, there is nothing to break. to self-repair.
Or try without a primer at all, turn off the primer, remove the tubes from it, squeeze them. Well, it will be necessary to work on the cold more as a starter.
Question: I have a Champion 137-16 chainsaw in operation (as it is written in the instructions). It worked fine, but now it began to spontaneously pick up speed when sawing (I do not add gas) and stall.
They told me to clean the air filter, opened it. it looked not particularly dirty, started it. without
it works, but I suspect that while driving from the site to the garage, I managed to cool down and the problem does not appear on a cold engine.
How To Actually Tune A Chainsaw!
Answer: It looks more like a lean mixture. either the fuel filter is dirty or there is an air leak in the chain fuel tank-filter-hose-carburetor.
Air leaks in the crankcase can also be, although it is extremely unlikely, with it the saw would either start poorly or would not start at all.
Question: I bought a Champion 138 chainsaw for work and ran into the following problem: after 5 minutes of work, it stalls at idle after the gas is released, starts up after that hard, grabs several times and immediately stalls.
There is a suspicion of a rich mixture, because a cold saw on suction does not start, I start it without suction, a candle in black soot.
Which screws on the carburetor to turn? To the service center far away.
I will try to replace the candle, but I doubt it will help. Which candle is suitable for this
Answer: Actually, the carburetor cannot be adjusted without a special key. Screw “L” must be tightened.
NHSP LD Bosch Oregon NGK Champion N6 HS8E O-U17 BPMR6F / BM6F, RDJ7Y / DJ8J. These are the candles that stand on this saw.
Question: I have a Champion 138-16 chainsaw in operation. during operation it stalled out for no reason, the spark disappeared, changed the candle, the same thing. How to fix?
Answer: Most likely, the ignition unit.
Question: Chainsaw Champion 137, for some time now there are problems with rpm. At idle, the chain quietly crawls along the tire, if the gas trigger is held down for a long time under load, then the chain does not even think to stop, it fumbles at idle like crazy, until I slightly push the air damper control lever. it helps.
Here, too, something has changed. Previously, he started a cold engine according to the instructions: he closed the air, pulled the starter, opened the air, started.
Now, if you can start in this way, then the Champion 137-16 chain saw stalls almost immediately, as soon as you pull the gas trigger, and sometimes even without it.
With a closed damper, it starts up without problems, but even here, when you press the gas, it sometimes bugs and stalls, if you hurry and do not allow it to warm up at idle (while the chain flies at a frantic speed).
And I also began to consume a lot of oil, more than two tanks of oil go to the tank of the mixture, after work the entire chainsaw is soiled with oiled sawdust.
Previously, it was the other way around, up to half of the oil on the tank of the mixture, although before I used the oil intended for preparing the mixture, now I use the usual cheap for two-stroke engines to lubricate the chain.
I can’t imagine how all this can be connected with each other, I just listed what became alarming. What do you advise?
Answer: Bring it to the service for diagnostics. there may be a lot of reasons. air leaks, wear of the carburetor. about oil, it is necessary to inspect all the holes for the passage of oil and a possibly blunt chain that is not able to give large sawdust pours trifles like a file.
Some pumps have an oil flow regulator, as well as the wrong type of oil, more liquid. change the oil.
Question: I have a Champion 138 chainsaw in operation, this is my first saw. Starts normally if the flap is released one click down.
Does not take turns, stalls. Now, after reading, I just found out that the chain should be automatically lubricated), it means that it does not.
Give advice, please, what could be the reasons for the fact that it does not gain momentum (stalls) and why the chain is not lubricated?
Answer: Remove the muffler and unscrew the spark plug and look into the engine with a flashlight. If there are “furrows” then, in principle, everything is the replacement of the CPG.
If everything is fine there and there is compression, check the fuel filter.
A chain saw is an indispensable tool in the household of any owner of a private house or summer cottage, as it greatly facilitates the life of its owner. Cut firewood, remove unnecessary trees, cut an opening in the wall, put up an annex, and much more that can be done with a chainsaw. However, this tool requires special care, since it experiences considerable loads during operation, and in case of a breakdown, you should not immediately contact the service department for help, but try to repair the chainsaws with your own hands. Firstly, this will save a lot of the family budget, and secondly, knowing the constructive device of the tool, you can easily carry out inspection and repairs on your own, without putting a lot of effort into it.
Checking the carburetor and signs of need for adjustment
The good condition of the carburetor determines the rated power of the engine and the economy in fuel consumption. The carburetor of a chainsaw has no functional difference from a car carburetor. It mixes gasoline vapors with the air entering through the pipe and feeds them further into the combustion chamber.
- air duct or tube for air supply;
- a fuel line or fuel supply pipe for mixing it with air;
- air damper.
An indication of the need to adjust the carburetor:
- strong vibrations due to unbalanced screws. An engine with a working carburetor runs smoothly, it sounds like a four-stroke stroke;
- damage to the protection cap;
- wear of the piston system, which already requires a different mixture in composition;
- involuntary shutdown of the engine, the impossibility of its repeated or initial start;
- unreasonable increase in gasoline consumption, while engine power may remain the same, and most often decrease;