How to remove the carburetor on a STIHL 180

Malfunctions and repairs

STIHL 180 chain saw carburetors need adjustment, both initially and occasionally. You can tell when it is needed by looking at the following warning signs:

  • Engine trouble, such as the engine not starting or stopping right away after starting. Usually a low-quality fuel mixture is the cause.
  • Fuel consumption and increased exhaust. There are more exhaust fumes due to incomplete combustion. often than not, this problem can occur due to fuel overload.

Other problems can occur, such as a clogged air filter or scale buildup. Causes can be due to gasoline remaining in the fuel tank when idling for long periods of time. This is due to the fact that the fuel is exhausted, which spoils the device.

Regardless of the cause, carburetor repair will be required, which most often involves adjusting the. The correct procedure for this varies depending on the chainsaw model, but a general guide is as follows.

How to remove the carburetor from a chainsaw

Remove it from the STIHL chain saw before carrying out any adjustments. To do this, it is necessary:

  • Turn the catch to the left to remove the cover.
  • Remove the filter by unscrewing the two nuts that hold it. For ease of operation, it is recommended to use special screwdrivers with suitable nozzles.
  • Remove all the rods, including the carburetor lever.
  • Remove the carburetor and then disconnect the fuel hose.

It is recommended to remember the position of the parts, so you can then put the carburetor in place without leaving unnecessary fasteners or creating misalignments and slots.

How to Clean

If your chain saw cuts out when idling, take it apart and clean it. First of all it concerns the cleaning of the additional filter. This part is a mesh. To get to it, you need:

  • Remove the largest cover.
  • Remove the diaphragm, which is located under the cover.
  • Clean the mesh that is located in the recess. This should be done very carefully, because the mesh can fall out. Use a copper wire for cleaning. Additionally it is necessary to flush and purge all channels. The last procedure is necessary if the carburetor does not receive gasoline.

How to configure it

Adjusting the carburettor on a STIHL STIHL 180 chain saw is designed to improve performance and fuel economy.

  • Clean the fuel system, including the tank, of residual gasoline and oil mixture. Blow through the air duct and filters.
  • the chainsaw carburetor is adjusted with H, L and S bolts. Bolt H controls the nozzle and provides maximum RPM. The L bolt performs the same function, but provides the minimum rpm. The S screw is responsible for the accuracy of the idling speed. Perform this procedure with the engine off.
  • Adjust the carburetor on the chainsaw by setting the appropriate angles of the first two bolts. You can set the basic values as follows. The first two bolts should be turned slowly clockwise and after the stop go back two revolutions.
  • Switch on the engine and adjust the ignition on the STIHL chain saw and its carburettor. To do this, find the highest idle speed by turning the L bolt in different directions. Once this maximum is found, the bolt must be returned a quarter turn. If the chain starts to move, the engine must be stopped.
  • Carry out a technical check. In particular, you need to determine the maximum number of revolutions, check acceleration and stability of the engine at idle, as well as compliance of these parameters with the basic values in the manual. The quality of the mixture to be checked should be of the highest possible quality.

preparatory stage

Repair of any machine should begin with a preliminary step, and the STIHL 180 is no exception. The preliminary step, well in advance before the disassembly of a chain saw STIHL 180, you must remove the side cover of the chainsaw, the chain and the bar. Next, using a compressor and a brush, you need to clean the chain saw from dirt, sawdust, oil stains, and the rest.

When cleaning the saw, special attention should be paid to the area where the chain saw’s drive sprocket is located, since. к. this is the dirtiest area.

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Where there is a lot of oil, of course wash it off with uncontaminated gasoline.

Calm 250 chainsaw malfunction (carburetor chainsaw malfunction):

Immediately after winding, the chainsaw has an increased speed, and if you press the gas instead of starting to accelerate, it will choke and even stop. Or it starts poorly, does not pick up speeds and kiosks (this chainsaw malfunction is applicable to other expensive chain saws with a gas pedal pump in the carburetor).

Cause of chainsaw failure: Worn rubber sleeve on booster pump piston in carburetor (fuel booster). This causes the accelerator pump to suck in air, and the main jet injects a depleted fuel-air mixture (mixed with a little gasoline) into the diffuser, and the chainsaw first runs at higher speeds and then throttles and nods. It happens after 2-3 years of use and usually occurs in the hot summer months.

Chain carburetor malfunction

Remove the carburetor from the chainsaw. Remove the gasoline pump cover with the diaphragm by loosening one screw in the center of the cover. Then turn the carburetor toward you with the throttle, on the side where there are two holes, one pin is visible, here under it is the accelerator pump. Remove the retaining ring from the outside of the pin and disconnect the wire spring air damper. Unscrew the screw in the center of the choke, remember how the choke is installed (and then put it down) and remove the choke. Finger pin hole (the gas pedal is spring loaded and if you pull the throttle shaft out and don’t close the hole, the gas pedal will pop), then rotate the throttle shaft and remove it. Shake the gas pedal (piston) spring out of the hole. The piston has a rubber collar (ring) that is worn and is the cause of the chain saw malfunction. You need to replace the piston with a rubber collar and spring (these are sold as a repair kit). Or you can take out the worn piston and spring and plug the hole by hammering a rubber plug (the chainsaw will be without a booster pump, t. Е. It will not accelerate within 3 seconds, but within 4 seconds, but it will work well, because there will be no suction carburetor).

Reassembly after repairing the chainsaw malfunction (after removing the carburetor chain saw malfunction) is done in the reverse order of disassembly. When reassembling the throttle, the throttle must be properly positioned so that it does not stick, and screw the throttle screw onto the axle, degrease and spread with a special thread sealant (sold in small tubes, red. fluid) or pliers, because if this bolt comes out during operation, it goes right into the cylinder), and repair or replace the piston cannot be avoided). That’s why we looked at troubleshooting this chainsaw malfunction.

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Hello, dear reader. Today I will tell you how to repair your STIHL chain saw in one hour with your own hands in the field, without interrupting production. Many of us have a lawnmower, chainsaw or cultivator. What to do if the device has stopped working normally, namely. stalls, does not start, does not hold idle speed, loses power, unstable operation of the engine? Some people take a screwdriver and start to twist the carburetor adjustments, which is not recommended. It is easy to reset the factory settings, but it will be difficult to restore them later. Let’s begin repairing the carburetor of any device running on gasoline with its thorough cleaning. And then you can adjust the speed., if you know how to do it.

Dirt, dust, sawdust, or water in the carburetor is most often the cause of all malfunctions.

ремонт карбюратора stihl 180

Not everyone knows that you can cope with the problem yourself. You need a lot of time and energy, if for example a medium-sized cultivator that is dirty, bulky and weighs 50 kg breaks down. and more. So it will be easier for us, if we have free time, to do the STIHL chainsaw repair with our own hands.

My repair work is all about getting things done. The main thing is not to lose or break anything All carburetors are cleaned in almost the same way and the result will not make you wait. We are going to repair our STIHL chain saw. We need some gasoline (leftovers from the tank are fine, or clean gasoline), a Phillips head 8 and a screwdriver, any brush to wipe off the dirt. I blow out all the parts with a compressor. If there is no compressor, we wash in pure gasoline.

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I replace the carburetor on a Stihl MS180 with an Amazon Carburetor.

Brush on the dust and dirt. Take off air cap. Remove air filter.

View of chainsaw with cover removed

Unscrew the two nuts of the air filter housing.

A chainsaw without air filter and cover

After removing the air intake housing, we see the carburetor itself and the gas pedal and “choke” rod. To loosen the throttle lever, use your finger to push down the choke.

remove, carburetor, stihl

STIHL chain saw with gas pedal lever removed

Remove the choke lever, closing it completely and moving the carburetor from its seat. Let’s take off the engine stop wire. Pull it toward you.

remove, carburetor, stihl

The plastic lever that holds the wire, also remove. On the left side it goes up. On the right side is inserted into the hole. There you go:

There is nothing to stop us from removing the carburetor and cleaning it.

It is a good idea to check the condition of the fuel filter, remove it and blow out the fuel hose.

Remove the cap from the bottom and the top of the carburetor. Be careful with the gaskets and membrane! We clean, rinse and blow it out.

In the pit of the carburetor is a mesh that needs to be cleaned. You can use a dry cotton swab for this.

After drying from gasoline carburetor can be blown. Here we see the diaphragm. Carefully unbend and also blow or rinse in gasoline.

Look carefully. so the debris doesn’t get into the seats when you reassemble it.

After the repair it does not want to start right away, because the carburetor is empty and clean. A little patience.

It runs like clockwork at idle. It used to stall and not develop power. For purity of the experiment the plug was replaced after the result. 19 changes with a wrench. It took about an hour. Also in the field I repaired my power tiller with my own hands. Good luck.

Why do you need a pre-tuning??

During the first hours of work the 2-cycle chainsaw engine needs running-in, the quality of its further work depends on it. During the running-in period the initial carburetor adjustments are made. the optimal parameters of fuel mixture preparation and supply are set.

The initial running-in of a chainsaw: thin material

Most modern chainsaws come pre-set for sale. Nevertheless, it doesn’t hurt to check the factory settings. after all, you are the one who has to work with the tool.

During the first start-up the chain saw must run in a gentle mode. Therefore, for several hours after starting it is recommended not to overload the engine and perform cutting only small branches and trunks up to 10 cm thick.

A simple rule of thumb can help protect against chainsaw carburetor malfunctions:

    Always mix gasoline and oil in accordance with the manufacturer’s recommendations.

Fuel mix proportions for your chainsaw engine

The chainsaw should start correctly, have a stable sprocket speed and a smooth increase/decrease in power. When starting the engine, there should be no unusual knocking, squealing, or noise.

Professional chainsaw in action

When running in and out of the machine for the first time, it is important to check that the fuel consumption is in line with the power rating.е. In practice the saw should not go out, sneeze, smoke and jerk when working.

Checking and then replacing the defective diaphragms

STIHL 180 chain saw carburetor membrane kit

Blown or damaged diaphragms are a common cause of carburetor malfunctions. The easiest solution is to replace them. If repair is required urgently, buy diaphragms in the same technical stores. And if you can wait a week or two, then order them from Aliexpress. When you buy from this service, you can save significantly. It is worth paying attention to the whole diaphragm kits (, but you will provide yourself with components for the entire life of the saw). Also includes a rocker arm with needle. a necessary spare part for the repair of chain saws.

Cleaning the carburetor and all about it: useful tips

You already know what cleaning a chainsaw carburetor is. We have painted all the nuances and minutiae, and now in the summary we will consider other options for breakdown or malfunction of the tool, accompanying clogging carb, to which you should also pay attention:

How To Clean The Carburetor On A Stihl Chainsaw (MS180C) with Taryl

  • failure of the rubber adapter. When it bursts, the chainsaw gives the same dysfunctional signs as a clogged carburetor. It is located between the cylinder and the carburetor;
  • you can hear its name and as a spigot. In addition to the fact that the carburetor in the saw is clogged, the spigot can get rusty;
  • Cleaning the carb will not be enough, you will have to change the rubber adapter. Our catalog will help you do this easily;
  • The fuel filter retainer may be cracked or broken, accordingly, all the dirt goes into the carburetor;
  • may be clogged mesh on the crab, which should clean the gasoline that passes from the tank to the needle;
  • don’t forget to record the amount of rpm that the “H” and “L” screws were unscrewed. Adhering to the competent return them in their place. you will save the settings of the carburetor, and after all, this is a completely different article.
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In this article, we showed a detailed video on how to clean the carburetor and all the elements that connect to it to get your saw working. Also provided a fair amount of advice. If you take it as a rule to clean it regularly, change filters in time, check and on the strength of the fixation, in advance get hold of a carb repair kit, then this procedure of complete cleaning will have to do very rarely. It is also important to use quality fuel so that your carb will prepare a good mixture for work.

You can see that the causes of STIHL chain saw 180 failures are quite numerous, and at the same time there are many different solutions to the problem. If you are faced with this situation, then simply follow all the above written recommendations and then, for sure, you will be able to repair your device, and it will please you with its work for many years.

In fact, as you see the causes of chain saw breakdown, Stil 180 are quite a lot, and at the same time the solutions to this problem are just as good. If you are faced with such a situation, just follow all the above recommendations, and surely you will be able to restore your device, and it will please you with your work for many more years.

Why a STIHL 180 carburetor overflows and a few typical problems

After we have considered the structure of the carburetor to determine the reason why the fuel enters the combustion chamber in a larger volume is not difficult. This is due to wear of the gasket between the compensator cap and the carburetor housing. You may ask how it can affect?

The answer is simple, when the gasket is compressed it lets the diaphragm on top of it down by a fraction of a millimeter. It, in its turn, presses harder on the yoke of the needle valve, it will open more than it should and the fuel will be in excess (will start to overflow).

Another reason is the stretching of the diaphragm itself, which is the result of natural wear and tear. It is impossible to prevent this process, but it is possible to solve the problem by periodically changing all the gaskets, carburetor diaphragms, and the fuel pump. There is a repair kit for this.

When cleaning your chain saw with compressed air, you should never blow into the fuel pipe as this could distort the diaphragm.

STIHL carburettor problems and how to avoid them

A common cause of carburetor failure on STIHL chain saws is a stuck valve in the nozzle. Storage of STIHL chain saw, or more accurately the STIHL 180 manufacturer’s instructions for proper storage practices, is the reason for the chain saw sticking.

According to the manual it is absolutely necessary to drain the fuel from the tank before storing the saw for an extended period and then start the machine and burn off the gasoline from the carburettor. If this elementary rule is not followed it will have the following consequences. The fuel valve is in direct contact with the fuel and therefore sticks to the housing, ie. к. gasoline evaporates little by little and only sticky oil is left. It is impossible to replace the injector, because. к. They are not in the repair kit, you can only try to knock it out and flush, which is not always possible to do without damaging the nozzle.

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