Rebooting the carburettor on the STIHL chain saw 180 with your hands
Malfunctions and repair
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. It happens because of wear of the gasket between the compensator cap and the carburetor body. You might ask how this might affect?
The answer is simple, when the gasket is compressed it lets the diaphragm on top of it down a fraction of a millimeter. It in its turn presses harder on the yoke of the needle valve, it opens more than it is supposed to and the fuel comes in too much (starts to overflow).
Another cause is 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. This is where the repair kit comes in.
When cleaning chainsaws with compressed air, in any case you can not blow into the fuel tube, it can lead to stretching the diaphragm.
Jammed injector valve. a frequent problem and how to avoid it?
A common cause of carburetor failure on STIHL chain saws is a stuck valve in the nozzle. The cause of the sticking is improper storage of the chainsaw, or more precisely, the STIHL 180 manufacturer’s instructions on proper storage preparation.
Before leaving the machine for an extended period of time it is important to drain the fuel from the carburettor and then start the cutter and add gasoline to the carburettor. Failure to do so will have the following consequences. The forsknui valve, being in direct contact with the fuel, sticks to the. к. the gasoline evaporates little by little and only the sticky oil remains. It is not possible to replace the nozzle. к. they are not in the repair kit, you can only try to knock it out and wash, which is not always possible to do without spoiling the nozzle.
Disassembling a STIHL 180 carburetor
To bleed, change gaskets or needle valve, carburetor needs to be disassembled. There are four screws on the compensator cap and one on the fuel pump that need to be loosened.
After opening the casing, you must be very careful because it is impossible to open the carburettor. к. debris in the carburetor will make it impossible to operate. The thickness of the channels in it, is comparable to the thickness of a thread or even a human hair.
Husqvarna chain saw adjustment
During the break-in period of the Husqvarna 142, 240, 236, 137 and other similar models the carburetor is set so that the engine rpm is 600-700 less than normal working. In the case where the working frequency can not be adjusted by the tachometer, it is not recommended to reset the factory settings with the H screw.
It is strictly forbidden to exceed the working RPM on your own. When, after adjusting the carburetor, the chainsaw chain is idling, turn the screw T counterclockwise to stop it.
In order to tune the saw accurately, it is necessary to set it on a flat surface with the bar facing forward. Also it is necessary to warm up the engine at least 12-15 minutes. First determine the highest number of idle speed. To do this, the L screw in the chainsaw should be turned clockwise, and then in the opposite direction. After determining the correct frequency, the same screw is turned counterclockwise from 12 to 25% of its full turn.
Idle speed in models of this manufacturer is adjusted with the nozzle with the letter T. Adjust by turning it clockwise until the chain stops moving. Then turn it slightly anticlockwise until the chain stops moving.
The chainsaw H screw is adjusted correctly only when the saw does not make much noise when the throttle is pressed all the way down, and it is not weighed down by any load.
If the saw makes too much noise when working and smokes, this nozzle should be turned from left to right to adjust.
How to repair the STIHL 180 with your own hands
The STIHL 180 is a German chainsaw designed for gardening, cutting firewood, clearing land and other woodworking tasks. Many have come to love it for its compactness and ease of use. The machine combines seemingly opposite qualities. power and maneuverability. The German designers went to great lengths to create this example, but the MS 180 STIHL has some drawbacks that users encounter in various applications. Like all machines, it has a tendency to malfunction. What to do in such cases and is it worth calling a workshop??
If you need to clean or service the STIHL 180 carburetor, firstly you need to remove the carburetor unit from the chain saw. It is necessary to do this with the observance of a certain algorithm of actions:
- To replace the chain saw with a guide bar.
- Remove the top cover of the chainsaw.
- Unscrew the two nuts that hold the air filter and carburetor.
- Remove the air filter housing.
- Disconnect the wire from the engine control lever.
- Carefully take out the lever from its seat in the body, at the same time disconnecting from it the rod of the air damper.
- Pull the carburettor toward you and disconnect the fuel supply and the choke link.
To facilitate disassembly, you can additionally unscrew the rear handle and disconnect the throttle link first from it, and then only from the carburetor. This may be necessary because. к. without some experience disconnecting the pull rod from the carburetor is quite problematic and it is easier to disassemble the handle first.
How to adjust carburetor of chainsaw STIHL MS 180
Reinstall the part by following the reverse order of the algorithm.
When removing and installing the chain saw engine control lever, you should be extremely careful, because. к. the seat on the saw body, is the weak link of the saw, and very often inexperienced users break it.
REPAIRING THE STIHL MS 180 CHAIN SAW
Qualified STIHL chainsaw repair at STIHL Direct Hands. We are an authorized service center of this brand. It guarantees strict adherence to technology and the constant availability of original spare parts in our own warehouse. By contacting us, you can restore the equipment in the shortest possible time and without overpayment.
The STIHL MS 180 is one of the world’s most popular chain saws. Its advantages:
- Effective QuikStop chain brake that provides the necessary safety when working,
- anti-vibration system,
- the Ematic chain lubrication system that gives the saw chain a longer service life and reduces sawing oil consumption by up to 50%.
Why a STIHL 180 carburetor overflows and some typical problems
After looking at the carburetor, it is easy to see why more fuel enters the combustion chamber. It happens because the gasket between the compensator cap and the carburetor housing is worn. You might ask how it affects the following things?
The answer is simple: when the gasket is compressed it pushes the diaphragm on top down by fractions of a millimeter. It, in turn, presses harder on the yoke of the needle valve, it opens more than it is supposed to and the fuel comes in excess (starts to overflow).
Another reason is the stretching of the diaphragm itself, this occurs as a 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 the chainsaw with compressed air, in no case can you blow into the fuel tube, it can lead to stretching the diaphragm.
Frequent STIHL carburettor failure and how to avoid it
A common cause of carburetor failure on STIHL chain saws is a stuck carburetor nozzle. Storage is often caused by improper storage of the chain saw, or more precisely, the STIHL servicing instructions on how to store it correctly.
According to the manual, before storing for a long time, you need to drain the fuel from the tank, and then start the saw and burn off the gasoline from the carburetor. Failure to comply with this elementary rule, entails the following consequences. The nozzle valve, being in direct contact with the fuel, sticks to the housing, t. к. The gasoline evaporates little by little and all that’s left is sticky oil. It is not possible to replace the nozzle, because the chainsaw has a longer service life than a conventional chain saw. 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 spoiling the nozzle.
STIHL chainsaw repair manual; STIHL 180 instruction manual
The STIHL 180 chain saw has proven itself on the construction market. This hand-held device has 1400 watts of power and a motor volume of 31 cu. cm. Saw chain is 350 mm long and revolves more than 2,000 times when idling. Its popularity among customers is also due to the affordable price of the tool. But problems do occasionally arise when using a chain saw. Service tool repair is not cheap, so those who understand at least a little bit in technical matters, fix the breakdowns with their own hands.
STIHL carburettor construction: Adjusting the STIHL 180 carburettor: Repair and adjustment of the STIHL chain saw. How the carburettor on a STIHL-180 chain saw works
A chainsaw is indispensable for many household chores. That’s why it pays to know how to use and maintain it. This applies first and foremost to the operability of the carburetor. It is the part that determines how well the chainsaw performs. That’s why STIHL chain saw carburetors need to be adjusted in time. With a little knowledge and experience, it can be done by yourself.