Adjusting the carburetor on the Champion 137

Champion 137 chainsaw. Testimonial from a subscriber

Bowsaw is designed for home use only. It can be used to work in the country, to cut branches or to cut firewood for the barbecue. Champion 137 will suit outdoor enthusiasts, t. к. it is the lightest chainsaw in Champion‘s line of residential chainsaws.

Manufacturer’s recommendation to use this chainsaw is rarely followed in our country, that’s why you may see Champion 137 at sawmills, where they cut slabs with it. Private offices, which are engaged in cutting and selling firewood to the population, also often use this chainsaw.

137th model is popular because it. к. has a low cost. Another advantage is the repair cost and the large number of spare parts. In specialized stores there is a wide choice of both original and made-to-original, homemade spare parts.

Champion chainsaws (Champion) 137

Champion 137 is designed primarily for home use. The tool is sufficiently rugged and robust to withstand considerable wear and tear under severe weather conditions. Another advantage of the Champion 137 is its moderate fuel consumption. This feature allows the model to handle large volumes of felling and clearing branches and limbs from large forest trees.

Design of the Champion 137 chainsaw

The Champion 137 is powered by a 37.2 cm3, 2-stroke gasoline engine.Internal walls of the engine are evenly coated with chromium to protect the mechanism from corrosion. A manual starter is included for engine starting, and a forced-air system is provided for engine cooling. A manual fuel pump ensures safe cold engine starting.

Reliable carburetor for fuel mixture preparation. The unit is equipped with a long-life filter to clean the air. Free access to it lets you replace a worn filter element with a new one. The electronic ignition system and Champion RCJ6Y spark plug are responsible for fuel ignition, and the tool clutch is responsible for torque transmission.

Throttle switch, ignition on/off button, and throttle lever are included for operating the Champion 137. All elements are installed in the rear of the saw, close to the operator’s hands. In the same part of the Champion 137 there is a handle cable with starter rope.

To protect the operator from accidental injury, the Champion 137 is equipped with a handguard for the right hand and a slow-braking chain. It is turned on and off with a separate lever.

All parts and inner workings of the chain saw are housed in a rugged plastic case to protect them from damage. Free access to the spark plug, air filter and other consumables makes it easy to service and repair the saw.

Model Specifications

The main advantage of the Champion 137 chain saw is its decent technical parameters. They include:

  • 2.1 liters of power. с.;
  • The idle speed is 3000 rpm;
  • Fuel tank capacity is 310 ml;
  • The capacity of the oil tank is 210 ml;
  • The recommended length of the bar is 35-45 cm;
  • chain pitch 3/8 ;
  • weight. 5 kg.

Champion 137 chainsaw has a low noise level when working. Its maximum threshold is 106 dB. In addition, the model has a small size. Length of the tool is 38 cm, width 24 cm, and height 28 cm.

Adjusting the Champion 137 chain saw carburetor

Adjusting the carburetor with their own hands is necessary if the tool will not start, or will stall immediately after its launch. For the procedure to help, it is necessary to clean the carburetor jets from clogging, as well as get rid of air residues.

The chainsaw is equipped with a membrane carburetor. It is equipped with three adjusting screws marked H, T and L.

The instructions indicate the following procedure to adjust the assembly:

How to Adjust a Champion chainsaw carburetor

Tuning a chainsaw carburetor. Or how not to pay repairmen!

Owning a chainsaw makes life a lot easier even for an amateur, and in some professions this tool is virtually irreplaceable. However, like any relatively complex device, the chainsaw requires periodic maintenance. All kinds of malfunctions can occur because of untimely or poor maintenance, or as a result of both routine and excessive loads. For professionals, an interruption or unstable operation of the saw reduces the efficiency of the work or can cause a ruined day’s work. One of the fairly common malfunctions is improper carburetor tuning of a chainsaw, which is thrown off due to failed attempts at adjustment or shifting adjusting screws for other reasons.

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Разборка бензопилы Champion 137

Symptoms of malfunction and breakdowns that require adjustment of the carburetor.

The following signs and malfunctions indicate the need to adjust the carburetor:

  • The engine starts hard and shuts down almost immediately;
  • The gasoline consumption is too high, the exhaust is too thick, the combustible mixture in the cylinder does not burn completely;
  • The chainsaw’s carburetor settings are disrupted (due to vibrations or unsuccessful attempts at adjustment);
  • Faults in the air-cleaning system causing debris to enter the fuel-distributing mechanism;
  • Significant wear and tear of the piston group. in this case, the carburetor tuning serves as a temporary measure.

It is clear that if dirt gets into the fuel system, just tuning the problem can not solve. you need to flush it. In the case of the worn piston assembly a complete overhaul is required. But in all these cases the carburettor is also adjusted.

Design, construction and principle of operation of a carburettor.

The carburetor is needed to prepare the air-fuel mixture for powering the engine. If the proportions in this mixture are incorrect, the engine malfunctions. If the mixture is not proportional to the amount of fuel, it is called oversaturated, and if it is short of fuel, it is called lean. Both are not good for the engine.

In different models of chainsaws carburetors differ in design, but in principle they are similar. Air flow moves at high velocity through the air duct. The damper, which closes the channel, lets you change the speed of the air jet. Fuel flows through the nozzle into the duct where it mixes with the incoming air to form an air-fuel mixture. The mixture is fed to the engine.

The pressure in the float chamber, where the fuel is before mixing, is almost equal to atmospheric pressure. But in the air duct creates a vacuum, so that the fuel is drawn into the air flow. The more the choke opens, the faster the air moves, and the amount of fuel also increases. the engine speed rises. This is an introduction to how a carburetor works.

For the efficient, smooth operation of the tool, maximum output and at the same time economical fuel consumption it is necessary to adjust the chainsaw carburetor. Before adjustment it is necessary to check the fuel and air filters. they must be clean. On most chain saws adjustment is made by three screws: idle, high rpm, low rpm. Proper carburetor adjustment is evidenced by the following signs:

Champion saw. Quick carburetor adjustment.

How to adjust the carburetor on a chainsaw,adjustment of the carburetor,adjustment of the carburetor on the.

Adjusting the carburetor on a chainsaw

Adjusting the carburetor of a Champion 254 chainsaw with your own hands. Shows the initial carburetor adjustment

  • The chain does not idle.
  • Engine accelerates smoothly and quickly.
  • The sound of a running motor is smooth, similar to the sound of a four-stroke engine.
adjusting, carburetor, champion

You must be as careful as you can be about carburetor adjustment, because a mistake in adjustment can have very serious consequences, up to and including engine malfunction. If you are not absolutely sure, contact a service center.

Adjusting the carburetor on a Husqvarna saw.

For running-in mode, so that the parts receive enough lubrication, the Husqvarna chainsaw carburetor setting is made so that the maximum rpm was at 600-700 rpm. Below idle speed. If it is not possible to set the maximum operating speed with the tachometer, you should not change the preset value with the H screw. The manufacturer does not allow you to exceed the maximum rpm. If, after completing the adjustment, the saw chain continues to move when the engine is idling, turn the screw T fully anticlockwise to stop the chain.

For the exact adjustment the saw should be warmed up for at least 10 minutes, placed on a flat surface. The bar should point in the opposite direction to the person making the adjustment. In the initial stage the highest idling speed is to be found. To do this, turn the adjusting screw L slowly from left to right, and then from right to left. When you have found the maximum rpm by experiment, turn the screw L counterclockwise by 1/8 to a quarter of a full turn.

Set the idle speed using the nozzle marked T. It should be turned from left to right until the chain starts to move. Then turn smoothly in the opposite direction until the chain stops turning. The screw H is set correctly if the noise emitted by the saw remains pleasant at full throttle and no load. If the exhaust is too smoky and the saw makes a lot of noise. the mixture is too rich. Turn the nozzle H clockwise until the correct sound is obtained. How to properly adjust the carburetor, you can see in the video below.

chainsaws Partner and STIHL, their adjustments.

On STIHL and Partner chain saws you adjust the proportion of air and gasoline in the mixture with the adjustment screws H and L. When loosening the screws the mixture is enriched, the rpm rises. Screwing the screw results in a lean mixture and consequently a fall in engine rpm.

The carburetor on the Partner chain saw is adjusted at idle speed with the screw T (STIHL designates this adjustment with the letters LA). The basic setting is done in the factory during final testing. In most cases the carburettor is set for a slightly more enriched mixture than is optimal. It is essential to keep the settings adjusted by the manufacturer during the first hours of operation, during the break-in period. After that you may make more fine adjustments, but it is not necessary, the saw will work fine even on the basic settings.

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A tachometer is needed for fine-tuning the carburettor and you will need technical documents so that you can work according to the manufacturer’s specifications. The best solution is to leave the fine tuning of the fuel system to the professionals.

Бензопила Champion 137

If you still decide to adjust it yourself, you should start with the L screw, then move on to the H nozzle, then adjust the idle speed by turning the T screw (or LA if it is a STIHL saw).

Turn the L screw slowly in both directions to find the point at which the idle speed is maximal. Once this point is found, it is necessary to unscrew the screw L by 1/4 turn. If the chain continues to move while the engine is idling, the screw T (LA) is slowly unscrewed until the chain stops.

After adjusting the maximum rpm with the H screw, check the speed value with the tachometer. If the RPM at the maximum does not correspond to the values specified in the documentation, the adjustments are repeated. If at the maximum rpm the mixture is too rich, there is too much smoke coming out of the muffler, with a lean mixture the saw makes a squealing noise and the engine gets too hot. The adjustment finishes with the idling speed setting. the correct position is when the engine revs smoothly at the minimum rpm and the chain is at a standstill. Setting the idle speed can be seen in the following video.

Tuning the carburetor of a Chinese chainsaw

Almost any Chinese chainsaw has the same adjustments as the branded counterparts. The same L, H and T screws are present. Sometimes there are saws in which only the idle speed can be adjusted. However, according to owners and service workers, not every chainsaw has a carburetor that can be adjusted without problems. Even for experienced repairers, some models can take a decent amount of time before you get an acceptable result.

How to adjust the carburetor on a Champion chainsaw

Use screws H and L to adjust the petrol/air mixture ratio determined by the carburettor throttle opening. When loosening the screws the mixture is enriched, and the speed increases accordingly, while tightening the screws the mixture is depleted. the speed drops.

The T(LA) screw is for adjusting the idle speed. To finally prepare the carburetor for the how. However on how to adjust? The basic “tuning” of the chainsaw is done at the factory during final testing. How to adjust carburetor on how to adjust Husqvarna. At. The carburetor is usually adjusted to deliver a richer (than optimal) fuel mixture. The factory setting must be maintained for the first few hours of operation of the saw. How to adjust the carburetor on a chainsaw can idle. Then (not necessarily) make a more precise adjustment of the carburetor.

Adjustment begins with the idle speed setting, for this turn the screw T (LA) counterclockwise, achieving a complete stop the chain at a stable engine speed.

Champion Saw. Quick carburetor adjustment.

How to adjust the carburetor on the chainsaw, adjustment of the carburetor, adjustment of the carburetor on the saw

Adjusting the carburetor on the chainsaw

Adjusting the carburetor of a Champion 254 chainsaw with your own hands. Shows the initial carburetor adjustment

For further precise adjustment you will need a tachometer and it is better to entrust it to professionals, In most cases it may not be necessary.

To adjust the tool, start with the L screw, then use the H screw and finally the T screw (LA).

Find the greatest idling speed, to do this slowly turn the screw L in different directions. STIHL chain saw filter on STIHL chain saw as in STIHL ms. After finding the position of maximum engine revolutions, turn screw L one-quarter turn counterclockwise. If the chain is rotating at idle, the screw T should be turned counterclockwise until it stops.

Adjust the power and RPM with the H screw. Adjusting the carburetor on the lean mixture leads to excessive RPM, engine overheating and failure of the piston chainsaw.

Warm up the chainsaw at idle for at least 10 seconds and turn the thumb screw H about 1/4 turn counterclockwise. How to adjust the carburetor, how to adjust the carburetor to lean. Let the engine run for about 10 seconds., then check maximal engine revolutions with a tachometer. If the maximum rpm does not correspond to the rated one, the operation is to be repeated. First on the chainsaw should if too high rpm x how to adjust the level. If the mixture is too rich, the muffler starts to smoke; if the mixture is too lean, the saw squeals and overheats.

Finish the adjustment by adjusting the idle speed, as already described above. The idle speed is set correctly if the engine is running smoothly at minimum rpm and the chain is not rotating.

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The carburetor can be considered regulated, if the engine accelerates quickly and sounds like a four-stroke at full throttle.

adjusting, carburetor, champion

Adjusting the carburetor on a Champion 137 chain saw

Adjusting the carburetor with your own hands is necessary if the tool does not start, or shuts down immediately after starting. For the procedure to work, the carburetor jets must be cleaned of clogs and any air residue must be removed.

The chainsaw is equipped with a diaphragm carburetor. It is equipped with three adjusting screws marked H, T and L.

As the instructions indicate, the adjustment of the assembly should be done in the following order:

  • First turn off the engine and turn the H and L screws two full turns from their fully torqued positions;
  • Then you need to start the chainsaw and let it run for 1-2 minutes;
  • After that you need to turn slowly the screw L. To find the maximum rpm when the engine is idling, use the tachometer. Then it will be necessary to loosen the screw by 1/4 turn;
  • Adjust motor operation up to 3k rpm. per minute is possible with the help of the screw T. If the tachometer is not used for adjustment, this screw must be turned until the saw chain on the bar stops turning;
  • At the end you need to set 12500 rpm. For this you need to use the H screw. If you don’t have a tachometer, with the throttle valve fully open you may feel the engine at its highest rpm. Once the revolutions are reached, you will need to turn the H screw a 1/4 turn in the opposite direction.

Basic equipment and production

Champion produces all tools in a standard package, which includes the minimum number of tools needed for adjustment and maintenance. Many owners recommend buying additional parts and oil when purchasing a Champion chainsaw. Despite the fact that the company cares about the quality of products, buyers note weaknesses that are characteristic of this or that model.

All the products are made in China, which greatly reduces the cost of Champion chain saws. However, some of the components for the saws are manufactured in Europe and America. For example, the engines for Champion are produced by BriggsStratton.

Some of the features of the Champion manufacturer include:

  • Equipment manufacturing is carried out with quality control at all stages.
  • Champion products meet national and international quality standards.
  • High technological potential of the company. Production is carried out on modern automated factories of world level.

Products are constantly being improved by the company’s developers, older models are being phased out. This guarantees maximum comfort and safety for the user during sawing operations.


In the majority of cases the following problems are encountered with the engine:

  • the engine no longer starts;
  • the engine starts but stops after a while;
  • the engine is not able to develop the necessary power
  • the engine runs very unstable.

how to check the crankshaft oil seals

You can check for leaking oil seals just by getting on the crankshaft itself and carefully inspecting it for leaks. On how to do this correctly you can read about

How to Check the Compression on a Chainsaw

If the compression level is below 8 atmospheres the engine will not have enough power, and therefore the chainsaw won’t be able to operate at its full potential.

Чемпион пила быстрая регулировка карбюратора.

  • Remove the protective cap and unscrew the spark plug.
  • Insert the tip of the compressometer into the hole where the spark plug should be located.
  • Turn the piston with the starter cord and note the maximum reading of the measuring instrument.

How to use

The Champion 142 chain saw comes with a detailed instruction manual. Reading it will give you an idea of how to operate the tool, so that you do not make mistakes when starting the saw for the first time.

The manual also includes detailed descriptions and troubleshooting for any malfunctions that may occur during operation. The chainsaw can be diagnosed and repaired by yourself based on the information in this manual.

Many users are looking for answers to their questions about chain saw operation in thematic forums, although most of the answers are in the manual, it just needs to be studied, which is not done by everyone.


The kit in which the chainsaw comes to store shelves is minimal and includes only a few things, these are:

  • instruction manual;
  • warranty card;
  • saw set (guide bar and chain);
  • A spark plug combination wrench;
  • screwdriver for carburetor adjustment (not always);
  • a protective tire cover;
  • A canister for preparing the fuel mixture.

According to the manufacturer’s information on the official website, the Champion 137 packages available at retailers may differ from the official equipment.

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