Champion chain saw how to adjust the carburetor. Algorithm of tuning

Champion 142 is a reliable chainsaw for simple tasks

Usually to adjust the carburetor of chainsaws Goodluck and other manufacturers use two screws. L and H, which allow you to create a fuel mixture of the required quality. If you want a lean mixture, turn the screws clockwise to increase the RPM. In other words, the purpose of the operation is to set high revolutions. If the screws are turned counterclockwise, then it will achieve a more saturated mixture. Accordingly, such an operation allows you to adjust a low number of engine revolutions.

Adjustment rules

Regardless of what manufacturer’s tool is to be dealt with, carburetor adjustment requires certain requirements to be met:

  • In order to properly perform the adjustment of the carburetor, you must first warm the engine. To do this, turn it on for 10 minutes;
  • You should check the air filter, which must be in working order. Its readiness is judged by the absence of dirt;
  • When rotating the chain by means of the adjusting screw T, it is necessary to stop it completely. This is done by turning the screw counterclockwise.

In the process of adjusting the carburetor, there is a risk of harming your health. Therefore, to minimize such unpleasant consequences, it is necessary to make sure that the chain is facing in the opposite direction. The saw should be positioned on a flat surface and make sure that it does not make contact with any objects with its cutting edge.

The process of fine tuning the screws requires a certain order: L. H. T. The L screw is used to adjust the maximum RPM. This is done by turning the screw clockwise or in the opposite direction until the maximum is reached.

Given that everything is done by “feel”, a tachometer or a good ear for music may be helpful

It is very important that you have a clear idea of what the maximum engine speed sound is. Then you can stop in time

First of all you have to be careful with the H regulator, because otherwise it can end up in engine failure. And in order to repair it, you will have to spend a lot of money. It is therefore advisable that this operation be carried out by a competent person.

The adjustment procedure

If you were able to get hold of a tachometer and you know what is the limit number of revolutions your engine has, then you can try to adjust the carburetor yourself. The process itself involves the following steps:

  • First, we need to find the closest value of revolutions with the help of the regulator L;
  • After that, using the specified regulator, move to a fourth of a turn of the screw, turning it counterclockwise.
  • Then we begin with the H regulator, but you need to be very careful here, because if you overdo it, it will lead to engine failure.

At the end of this operation, we need to perform the idling speed adjustment. At first it is necessary to achieve that the engine works evenly in any position until it begins to move. The screw that is used for adjustment should be turned counter clockwise until the chain stops. In case you fail to do so, you should have this work done by an expert, because using a chainsaw with a broken adjustment is dangerous to your health.

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 help, it is necessary to clean the carburetor jets from clogs, as well as get rid of air residue.

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Your chain saw comes with a diaphragm carburetor. It is equipped with three adjusting screws marked H, T and L.

As the manual indicates, the adjustment of the unit should be done in the following order:

  • First you need to stop the engine and turn the screws H and L for 2 full turns from the fully screwed position;
  • Next it is necessary to start the chainsaw and let it work for 1-2 minutes;
  • After that, start slowly turning the L screw. Thus it is necessary to find the maximum rpm when the engine is idling. Then it is necessary to loosen the screw by 1/4 turn;
  • Adjust motor operation at up to 3,000 rpm. per minute is possible by means of the screw T. If you don’t use the tachometer for adjustment, you must turn this screw until the saw chain on the bar stops turning;
  • At the end it is necessary to set 12500 rpm. For this purpose it is necessary to use the screw H. If you don’t have a tachometer, you will need to determine the motor’s performance at maximum RPM when the throttle is fully open. Once the revolutions have been reached, it is necessary to turn the screw H by 1/4 turn in the opposite direction.

Thanks to the correct adjustment of the carburetor, the owner of the saw will improve the performance of the motor when idling, and make the engine more responsive.

About the carburetor arrangement

The carburettor serves to mix the fuel consistency with the air, respecting the proportions set beforehand. If the precise dosage is not respected, the functioning of the engine is endangered. When a huge amount of air and not enough fuel comes in during mixing, the mixture is considered “lean”.

Do not allow and oversaturation, because with a large amount of fuel compared to the air is also likely to malfunction or wear out the motor. Adjusting the carburetor is needed not only before initial implementation, and when you identify any differences in his work. Before working with a chainsaw, do not forget to run it in.

The carburetor components

A carburetor has a standard set of parts, but they may vary slightly depending on the manufacturer. Components:

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  • Basics. This is a special tube, which visually resembles an aerodynamic design. The air passes through. In the transverse direction, in the center of the pipe, there is a choke. Its position can be adjusted. The more it is extended into the aisle, the less air enters the engine.
  • Diffuser. Champion 137 chainsaw. This is the narrowed part of the tube. It increases the airflow rate exactly in the segment where the fuel comes out.
  • Fuel lines. Fuel mixture is contained in the float chamber, then flows into the nozzle from which it flows into the atomizer.
  • Float chamber. Is a separate structural element, reminiscent of the shape of a tank. Designed to maintain an optimal level of fuel fluid in front of the inlet to the channel, where the air comes from.

Looking for a cheaper but reliable and time-tested model? Look at chainsaws made in Russia.

Or look at foreign chainsaw makers, like STIHL.

Block: 2/14 | characters: 1862

Champion C6500 sharpening machine

This sharpener enables the chainrings of Champion chain saws to be quickly blunted again. Due to its low weight and modest size, the device is easy to carry over long distances. The body of the machine is made of durable materials that do not corrode and do not deform under the influence of sunlight.

Adjusting the carburetor of a Chinese chainsaw with their own hands

Not all Chinese chainsaw carburetors have an adjustment. Today there are many models of domestic class chainsaws, including European brands, on the carburetors of which there are simply no adjustment screws. Or there is only one screw for idle speed adjustment.

Such carburetors require adjustment only when the chainsaw at idle rpm makes too infrequent exhausts (rpm) and sometimes throttles. Below we discuss the algorithm for adjusting the idle speed of a carburetor on a Chinese chainsaw.

Tools needed

Adjustment requires a screwdriver that fits the slots of the adjusting screws. On different carburetors, they are flat, cross-shaped, with internal or external hex, star, etc.п.

An electronic tachometer is helpful during adjustment. If it is not available, the adjustment is done by ear and by evaluating the actual operation of the engine.

Adjustment algorithm carburetor

Make sure it is necessary before adjusting. All Chinese carburetors, on every chainsaw have a factory setting, which is knocked down rarely. Adjustment may require a new carburetor, or in rare cases, an old carburetor.

The cause of engine deterioration with signs similar to poor fuel mixture in most cases is

If this is not the problem, then try to adjust the carburetor.

The engine should be warmed up. A cold engine works differently than a warm, working temperature engine. So adjustment when it is cold will not be correct.

  • Open access to the adjustment screws. On some chain saws it is enough to remove the fuel cap and the air cleaner. on others, a part of the case must be removed. The third ones have screwdriver holes in the housing.
  • There are markings on the carburetor or near the holes for the screws. T (or LA) L and H. T (or LA) is for idle speed adjustment. is always located away from L and H screws, which are next to each other.
  • If the chainsaw stops when you apply gas. the engine doesn’t have enough fuel to reach full throttle. The amount of fuel is adjusted with screw H (main screw). It is unscrewed by 1/4 turn and throttled. If the engine runs better, crank it up another 1/4 turn. (If worse, tighten 1/4 turn in the opposite direction.).
  • If engine starts to run like at idle it means there is a lot of fuel, turn back the H screw.
  • Check the peak rpm by ear or tachometer. The maximum rpm for each chain saw is given in the manual. (10,000. 12,500 rpm). In practice 10,000. 11,000 rpm in the “full throttle” position are normal values.
  • By increasing the fuel quantity with the H screw, correct the quality of the fuel mixture with the L screw. It increases and decreases the amount of air in the mixture. If there is not enough air, the fuel will not burn, and as a result the engine smokes, does not develop power, and consumes unnecessary fuel. The L screw also affects engine performance at low and medium rpm.
  • after adjusting the H screw, turn the L screw back a 1/4 turn. If the exhaust is smoky and the engine rpm goes from low to medium to high with dips, turn off the L screw some more.
  • Stop adjusting the L screw when the engine runs smoothly from low rpm to high rpm and there is no smoke.
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After adjusting the two main propellers, it is often necessary to correct the idle speed with the third propeller.

The position of the adjusting screws is marked with a red square. A screwdriver is all it takes to access it. There’s no need to disassemble anything.

Idle speed adjustment

Idle adjustment sequence:

  • Start the engine and warm it up for 5-7 min.
  • Turn out the screw, increasing the rpm until the chain starts to scroll.
  • Then the screw is screwed back in 1/4 turn.

how to tune a chain saw carb

If there is an electronic tachometer, you must use its readings when adjusting. Most chainsaws should reach an idle speed of 2,500 rpm.

Nuances that arise in the process

Do not turn the L-shaft too far out relative to the H-shaft. This will result in a lean fuel-air mixture (little gasoline. lots of air). With this mix, the piston is dry during operation, gets very hot and can be damaged.

The factory Chinese carburetor, which comes with the chainsaw, has an adjustment on the stands, taking into account the characteristics of each chainsaw. That’s why any change of screw position during adjustment should be memorized or written down to be able to return to the factory settings if the engine fails to start.

New carburetors on Chinese chainsaws, sold separately, are factory-adjusted for standard rpm or arbitrarily. Therefore, they may require adjustment after installation on a chainsaw.

Purpose of Champion 250

As Champion says, this model of chainsaw is universal. It can be used for both construction and maintenance of the site, cutting firewood and other household chores. You can also find the Champion 250 at the sawmill, where it is used to trim the bark on logs, or in the hands of electricians, who use it to cut small and medium-sized trees growing under power lines.

In general, Champion 250 really is a universal saw, it has already been tested by many users, whose reviews can be found on the pages of thematic sites.

Регулировка карбюратора пилы Adjust carburetor chain saw

As of today, there is no information about the 250 on Champion’s official website, because.к. Was rebranded and this model was replaced by Champion 251-18″. But those who want to own this particular model can still buy it, t.к. it’s still on the market.

Features and equipment of Champion 55CC

This Champion chain saw is also a home appliance. This is the most powerful saw in Champion’s lineup. It has a professional vibration damping system.

This tool is capable of lasting much longer than its counterparts due to the metal guards that protect the engine and oil sump. Key features of the chainsaw include:

  • Engine power is 3.2 liters. с. or 2.4 kW;
  • The volume of the motor. 55 cm3;
  • Fuel tank capacity 510 ml.;
  • Capacity of the tank for oil, lubricating the chain. 260 ml.;
  • The fitted standard spark plug. RCJ6Y from Champion;
  • Weight of the assembled model is 5.3 kg.

The standard equipment of the model includes a bar, 45 cm long with a slot width of 1.3 mm. Also included in the kit is a sturdy chain with 72 links and 0.32 cm pitch. This chainsaw has small dimensions. Length of the tool is 412, width. 260, and height. 275 mm.

Champion drank a quick carburetor setup.

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Chain saw 254 chainsaw carburetor adjustment by your own hands. initial carburetor adjustment.

Oil tank capacity is 0.21 liters, fuel tank 0.31. Saw chain with 3/8-inch pitch, 1 link width.3 mm and 56 links long. Saws weight is 4.5 kg.

Champion 142 brand chainsaw differs from its market counterparts by increased factory parameters, which allow you to use the garden tool under high loads in bad weather conditions.

  • Gasoline engine power. 2.5 liters. с.;
  • cylinder volume is 41.5 cm 3 ;
  • maximum crankshaft rotation speed. 12500 rpm;
  • fuel/oil reservoir. 310/210 ml;
  • The permissible length of the bar is 35-40 cm;
  • The pitch of the installed chain is 3/8 “;
  • Number of chain links. 56.

Champion 142 chain saw stands out for its relatively low weight, which, in the working form of the tool, is 4.1 kg. This is an order of magnitude less than most other amateur models.

For the chainsaw to work properly, you need to carefully perform carburetor adjustment work in exact order. If there are any malfunctions in the functioning of the device, it is necessary to perform a complete disassembly on their own. In most cases, it is necessary to replace any parts that have fallen into disrepair.

With continuous quality check of the carburetor settings and the implementation of timely actions to improve its performance problems with the chainsaw does not arise.