Tuning The Carburetor Of The Champion 137 Chainsaw
Chainsaw Champion 137. Model device
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 that has received an increased range of travel, as well as a chrome-plated cylinder with a volume of 37.2 cm3. For a quick start of the engine, the model has a manual starter and a durable clutch. Fuel tank, with a capacity of 310 ml, has a wide neck for cleaning the tank from small debris.
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, the vibration on the handles of the model is practically not felt.
The Champion saw attachment 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 headset to work, a separate 210 ml tank is included in the chainsaw device.
To protect the internal parts from dust, sawdust and shock, Champion has equipped the 137th with a durable, reinforced plastic case. 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 having to turn off the engine of the chainsaw.
Chainsaw characteristics Champion 137
Thanks to the powerful and durable standard engine, the Champion chainsaw in the 137th modification received solid factory parameters.
- Petrol engine power. 1.4 kW / 2 liters. From.;
- Crankshaft rotation speed at idle / maximum speed. 3000/13000 rpm;
- The tire length recommended by the manufacturer is 35–40 cm;
- The pitch of the chain used for sawing. 3/8 “;
- Weight in a ready-to-use form. 4.5 kg.
The Champion chain saw comes with a redesigned muffler to reduce operator noise. When operating at maximum engine speed, this parameter of the model is 100 dB.
Chainsaws Champion 137
Chainsaw Champion 137 is well suited for use in the garden and in the garden. Among the many advantages of a garden tool, the excellent quality of its components and factory assembly, a fairly high working resource, and also a relatively low fuel consumption stand out. With proper and timely maintenance, the Champion 137 chainsaw delivers high speed and good cutting quality, leaving a smooth, clean cut line. This allows the model to be used not only for garden maintenance, but also for construction work.
Adjusting the carburetor of the Champion 137 chainsaw
There are several situations where 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.
How to independently adjust an incorrectly working saw carburetor will be described in the operating instructions for the model. Correct course of action, anyway, should look like this:
- First, on a chainsaw with a cold engine, all the adjusting screws available in its device will need to be returned to their original position. It is indicated in the garden tool manual;
- Then you need to start the saw motor and wait until it warms up;
- Next, you need to start turning the screw L in different directions until the optimal low engine speed is found. Immediately after this, bolt L must be turned a quarter of a turn in the opposite direction;
- By the same principle, you need to adjust the screw H, which will allow you to find and set the highest possible engine speed. In order to more accurately determine the speed of rotation of the motor at the permissible speed, you will need to connect a tachometer to it. Then start slowly turning screw H. Once the revolutions on the tachometer and in the Champion’s instruction manual match, the screw must be loosened;
- If, after adjustment, when the saw is idling, the chain rotates on the bar, then you need to alternately turn the bolt T in different directions until the chain stops.
After completing the tuning of the saw carburetor with your own hands, you need to check the operation of the fuel unit. If the chainsaw is steadily gaining momentum, its engine is running stably, and the chain does not rotate on the tire when the engine is idling, then the adjustment was made correctly.
What you need to adjust your Husqvarna carburetor yourself?
To correctly adjust the carburetor of the chainsaw, you need to stock up on the appropriate tool in advance.
You will need the following list:
- The most common screwdriver, with which you can unscrew or tighten the adjusting screws;
- A tachometer designed to count the revolutions of the crankshaft. It is necessary when adjusting the idle speed, since it is quite problematic to determine the number of revolutions per minute by ear;
- Phillips screwdriver. It is needed so that it is possible to unscrew the screw (T);
- Compressor with a special gun connected to them. The blowing device will help get rid of excess debris and dirt, since the carburetor must always be clean.
How does the carburetor work on a Husqvarna 137 chainsaw?
On chainsaws of these models, the Walbro carburetor is most often installed from the factory. Before adjusting the Walbro carburetor on a Husqvarna chainsaw, you need to have a minimum understanding of its structure and know how it works.
How to repair a Husqvarna carburetor with your own hands?
During operation and diagnostics, defects in the carburetor may be found. Most of them can be eliminated on their own with a minimum of knowledge and without contacting a specialized repair center.
Among the methods of elimination are:
- Replacement of various gaskets at the joints of sealed parts;
- Cleaning or replacing the filter elements of the carburetor;
- Replacement of pump elements or valves;
Almost all of the above parts can be positioned as a repair kit, which is used for minor repairs of carburetors. After installing them, the carburetor of the Husqvarna 137 chainsaw can forget about malfunctions for a long time, and the regulation will become easier.
What is the factory setting of the carburetor of a Husqvarna chainsaw?
To ensure that the chainsaw will start anyway, even if the setting is incorrect, the factory settings of the screws H and L are applied. Most Husqvarna chainsaws can be started by unscrewing both screws exactly one and a half turns. Only then can the position of the screws be changed in order to achieve the desired fuel consumption and maximum efficiency. It is regulated by XX also after these manipulations.
If you still have questions about adjusting the carburetor on the Husqvarna 137 chainsaw and other models of this line, I recommend watching this:
Fuel mixture preparation
When operating a chainsaw, a fuel mixture of gasoline and oil in a ratio of 15: 1 by volume should be used, that is, 1 liter of oil should be added to 15 liters of gasoline and the mixture should be thoroughly mixed. The amount of gasoline and oil in the fuel mixture is shown in this table:
How to adjust the carburetor on a Husqvarna 137 chainsaw
The chainsaw is a great helper for any man living in his home. The chainsaw device is a complex system that requires careful maintenance and requires increased attention. Today you will learn how to adjust the carburetor of a Husqvarna 137 chainsaw with your own hands in the garage.?
Appointment Champion 137
The chainsaw is intended for domestic use only. She can work in the country, use it for cutting branches or preparing firewood for the barbecue. Champion 137 is suitable for outdoor enthusiasts as it is the lightest saw in the Champion range of household chainsaws.
The manufacturer’s recommendations on the use of this chainsaw in our country are rarely followed, and therefore Champion 137 can be found on sawmills, where they cut a slab. Private offices that harvest and sell firewood to the population also often use this chainsaw.
Review of the Champion 137 household chainsaw
One of the high-quality Chinese-made chainsaws is Champion 137. We will consider it in this review. Consider the application of this model, design features and self-repair.
Adjusting the carburetor of the Champion 137 chainsaw
Adjustment can correct the situation only when there is no air leak in the saw and blockages of the fuel system, and the chainsaw continues to gain momentum at idle or does not develop speed and full power.
The Champion 137 is a diaphragm carburetor with three standard adjusting screws (H), (T) and (L). Correct adjustment is carried out according to the following algorithm:
- With the engine off, all screws except (T) are set to 1.5-2 turns from the fully tightened state;
- The saw is started and allowed to warm up for several minutes;
- Tightening the screw (L) find the maximum number of idle revolutions, then loosen the screw by на of a revolution;
- Adjust the idle speed with the screw (T) to 3000, if the adjustment is made without a tachometer, then the screw (T) is unscrewed until the chain on the saw stops spinning;
- Twisting the screw (H) set 12,500 revolutions, if there is no tachometer, then by ear there are maximum revolutions with the throttle fully open, after which the screw is unscrewed by one quarter of a turn.
A properly adjusted carburetor keeps the engine idling and throttle.
Alexander. 45 years. Beloyarsk.
For more than a year and a half I have been the owner of Champion 137. I really like the saw, although I rarely work with it, only when it is necessary to prepare firewood for the barbecue and sauna. For all the time that I own this saw, she failed only once. As it turned out later, I myself violated the startup algorithm and filled the candle. After reading the instructions, I figured out how to purge the engine after an unsuccessful start attempt and started the saw on my own, although it smoked heavily for some time, but then the exhaust returned to normal. I am satisfied with the saw.
Ivan. 56 years old. Kursk.
I bought Champion 137 after my Stihl 180 broke down, and the cost of repairs turned out to be the same as buying Champion 137. Now I’m a little sorry. As soon as you take Champion in your hands, you immediately feel the difference with Calm. The saw starts up worse when hot, it cuts worse, but I reassure myself that I paid for it almost two times less than the new Stihl 180 costs. Most likely this saw will suit those who have not previously dealt with chainsaws.
Champion 137 can be repaired either at a service center or by yourself. Typical malfunctions of this model are as follows:
- Lack of spark;
- Fuel cut-off;
- Malfunctions of the carburetor (blockages, defects in the nozzle valve, defects in the membranes of the main chamber and the fuel pump);
- Air leaks into the crankcase through a gasket or oil seals;
- Depressurization of the carburetor.
If you have some experience, you can diagnose and fix faults yourself.
- User’s manual;
- Warranty card;
- Saw set (bar and chain);
- Combined candle wrench;
- A screwdriver to adjust the carburetor (not always);
- Protective tire cover;
- Fuel canister.
According to the manufacturer’s information indicated on the official website, Champion 137 configurations available from sellers may differ from the official configuration.
- User’s manual;
- Warranty card;
- Saw set (bus and chain);
- Combination candle wrench;
- A screwdriver for adjusting the carburetor (not always);
- Protective cover;
- Fuel mixture canister.
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, and a chain tension adjuster 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. A separate choke control lever that is mounted on the body 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 Champion 137 saw test.
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.
Removal of the top cover is carried out by dismantling 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. The link in the drive
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.
There are many small components in the carburetor, which are best placed in the correct order so as not to confuse anything.
There are only three bodies for adjusting the carburetor; these are screws shunted by springs for a flat screwdriver. At the bottom is a pair of screws, on the left is L, on the right is H. Just above is the T (or S) screw. So, this is what they are for:
- Screw L. This is the same valve that regulates the cross-section of the fuel channel when operating at low speeds.
- Screw H, by analogy with the previous one, is a channel flow regulator for high speed.
- The T screw is the throttle control. It determines its position when the accelerator lever is fully released.
The design of the first two adjusting screws is extremely simple: at their end there are needles inserted into variable cross-section spools (cones). They all have right-handed threads, so turning the screw clockwise will push the needle deeper and reduce the flow. When rotated counterclockwise, the opposite happens.
The adjusting screws for the highest and lowest speed should be moved clockwise until the highest resistance is encountered. When the screws reach the stop, you need to move them in the opposite direction and leave them after 1.5 turns.
If this does not happen or the speed increase is too slow, 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 make a full adjustment of the components of the carburetor when operating at maximum speed. Next, you should check the operation 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 revs up at an accelerated pace. With a gradual deepening of the pressure, it can be seen 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 was not 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.
A properly 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 precise 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:
- Strong vibration or damage to the protective cap. It rarely happens, but it does happen.
- Serious engine wear (piston). Of course, in this case, you should take more care of the repair of the chainsaw engine, but still adjusting the carburetor can improve its functionality for a while.
- Blockage in the 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.
- Firstly, the engine does not start, or it starts, but immediately 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.
Chainsaw 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 (models with one screw only have it).
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
- 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.
If you will be adjusting the carburetor of the Partner-350 chainsaw, then 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, placing 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.
It is impossible to adjust the carburetor of the Partner-350 chainsaw unless you remove the tip of the cable; this should be done in the next step. The petrol hose, which is to the left of the fitting, will need to be thrown off. All of the above work will disconnect the carburetor, which can be adjusted.
In order to understand how the Partner-350 chainsaw is adjusted, it is best to familiarize yourself in more detail with the device of this unit at the first stage. If you understand the principle of operation and the constituent elements, you can 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.
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 is roughly adjusted, designed for a certain composition of air and fuel. It is clear that the conditions at the place of work differ from the bench.
Another reason for adjustment is the repair or replacement of the carburetor. In any case, setting 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.
Maximum number of revolutions
To limit this value, 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 make this figure higher, the engine of the device will work for wear, which will lead to problems in the ignition system. When turning this screw, the ignition processes of the device must be taken into account. If the slightest glitches appear, then the maximum speed value must be reduced.
Chainsaw carburetor adjustment Champion
Every owner of a gasoline chain saw knows that the carburetor plays a role in the operation of the power unit, which must be adjusted not only before the first start of new equipment, but also regularly during its further operation.
It doesn’t matter if your saw is so powerful, expensive or popular, taking into account the brand, sooner or later this knot will have to be adjusted. A Champion saw, like any saw with integrated innovation systems, is prone to malfunction. Therefore, it is imperative for powertrain operators to know how to adjust the carburetor on a Champion chainsaw. We will talk about this and other in this article.
Chainsaw carburetor Champion
Tuning Champion is not tied up with the hassle of tuning cheap Chinese instruments that are modeled after brand expensive models. The Champion saw carburetor is simple, it contains several screws with different markings.
- Idling screw, with which you can adjust the speed of the main unit at idle. If at idle speed this screw is set to low speed, then the saw will not start, if the speed is set to high values, then the chain will start to wear out.
- Low rotation adjustment screw. This adjustment adjusts the ideal air / fuel mixture for operating the tool at low rotation levels. If the adjustment on this screw is knocked down, then the device will not start at idle speed; serious problems in the engine operation are also likely (it may fail).
- High speed adjustment screw. By adjusting with this screw, the operator controls the quality of the air / fuel mixture at high rpm. Failures do not lead to wear of the saw headset and damage to parts of the main unit.
Basic setup principles
Before trying to tune the carburetor, consider the basic principles of correcting its operation.
- The screws are easy to distinguish thanks to the marking. Adjust this or that screw when you are sure that you have correctly identified the cause of the problematic device operation beforehand.
- Different screws need to be rotated at different operating modes of the device.
- Only start operating the unit when you are sure that the carburetor screws are set correctly.
- Check your Champion saw’s manual for optimum RPM.
Features of carburetor adjustment
The carburetor is set up on the production line, but this does not mean that the operator does not need to make adjustments after purchasing the power unit. It is important not to wait for the first problems in the operation of the device unit (or some others, on which a lot of pressure will be applied), but to adjust the speed regularly so that nothing interferes with the effective operation of the tool.
Please note that it is not necessary to spend time on a trip to the masters in service centers, you can correct the screws yourself. All you need to do is refer to the instruction manual for your Champion petrol chainsaw model. In this manual you will find the following data:
- How to disassemble the tool in order to gain access to the adjusting screws (on some models it is possible to access without the need for additional tools, which is convenient);
- How to distinguish screws and figure out which one is responsible for the rotation in a certain mode of operation of the device;
- How to conduct an initial inspection of the saw, identify the problem and find out which screw needs correction;
- How to adjust the carburetor, taking into account a certain malfunction of the device.
Alas, not all operators have instructions for a certain Champion saw model, then a universal instruction comes to the rescue, which indicates the main rules for setting the carburetor.
Prerequisites for setting up the carburetor
In theory, everything is simple, it is enough to regularly monitor the quality of the air-fuel mixture using the screws on the carburetor. Nevertheless, even with frequent maintenance of this node, problems may arise:
- The saw headset works even when the operator does not give “gas”;
- The device stalls as soon as it can be started;
- The device starts to “roar” at idle;
- The saw does not start at all;
- The carved tool wears out quickly (or simply unevenly);
- In different operating modes of the unit, it is not possible to achieve optimal speed.
Please note that some carburetor problems can only be indirectly related, but adjustment of the unit will be necessary.
Chainsaw Adjustment Rules Champion
Follow these instructions:
We begin to adjust the carburetor at idle speed:
- We find the screw marked with the letter T;
- Twist it counterclockwise so that the flail stops completely, but the engine runs stably;
- Then we use a tachometer, which will allow precise adjustment (note that in some cases additional adjustment is not needed).
We continue to adjust the low rpm. This procedure involves the following steps:
- We find the screw, which is indicated by the letter L;
- At idle, we “look for” the nominal rpm values, which can be done by turning the screw L left and right;
- Once you have found the nominal idle speed, turn the screw one fourth of a full turn counterclockwise.
We adjust the carburetor at high rpm. This is necessary in order to avoid damage to the piston system of the chain saw or engine failure due to overheating.
- We are looking for a screw marked with the letter H;
- We carry out the adjustment with the engine warm (leave it running for 10 seconds);
- Turn the screw one fourth of a full turn counterclockwise;
- Wait another 10 seconds, after which we check the speed using a tachometer.
Please note that a rich mixture leads to problems with the operation of the muffler (it will smoke), and too poor will force the main unit of the device to overheat (grinding and squealing is heard, uncharacteristic sounds when the chainsaw is operating).
We complete the adjustment by checking the operation of the engine, which should accelerate to rated speed quickly.