STIHL grass trimmer fs 55 does not start

How to properly start a gasoline grass trimmer

The first start and run-in lawn mower is very important steps in the operation of a new tool. On the one hand they allow preserving the combustion engine life, laid down by the manufacturer, because at this step the running in of the moving units and parts takes place. On the other hand. are acquired 1-st necessary abilities to work with the trimmer, if it is a question of the first in life tool.

There are five main reasons why a STIHL grass trimmer doesn’t power up:

The use of low-quality fuel

The gasoline-trimmer does not pick up speed in case of low-quality fuel. It may stall or not start at all.

To check the quality of the fuel, you need to inspect the spark plugs. They are the main indicators of problems with the combustion chamber.

If there is a sediment formed on the candles, plaque, the old fuel is drained and filled with other, high-quality fuel.

It must be remembered that lawn trimmer or lawn mower must be filled with good quality gasoline and the brands of fuel specified in the technical passport of the device by the manufacturer.

The plugs should be thoroughly cleaned of plaque, and only after that, place them back in the combustion chamber of the fuel.

The air or fuel filter is dirty

If the lawnmower does not pick up speed, the reasons may lie in the contamination of the filter element: air or fuel.

When the air filter is clogged, there is a lack of oxygen in the combustion chamber, so the fuel is not fully produced, which prevents the desired speed and power.

To check if the air filter is the real cause, you need to take it off and turn it on. If the lawnmower is still not picking up speed, it’s not the mower. Then check the fuel filter element. Here everything is similar, only in the role of oxygen is gasoline. If this filter is damaged, there will be a lack of fuel, which inhibits the development of revolutions.

In both cases the solution is simple: you just need to replace the filter. If there is a spare,

install it, if not, buy it at any specialized store, costs inexpensive.

Problems with spark plugs

When the gasoline trimmer is used frequently, it is necessary to monitor the condition of the spark plugs. This part is subject to wear and tear and should be regularly inspected for carbon deposits.

You can solve the problem in two ways: clean the old spark plug from cinders or buy a new one.

In the first case, you need to unscrew and scrape with sandpaper, dry. The distance between the electrodes should be 1 mm. Grass trimmer is assembled and started.

If there is no spark between the electrodes, it is worth inspecting the quality of connections of all circuit elements. If even in this case everything is normal, then 100% you need to change the plugs.

To replace them is not difficult and inexpensive. Among the tools you will need a wrench and a nail file.

With frequent occurrence of soot on the spark plugs, it is worth looking for the cause a little deeper.

The spark plugs should be thoroughly cleaned of plaque

Engine trouble

Problems with the engine. already more serious. There are several possible causes:

In the case of a carburetor problem, you should first look at the cable. It may be loose, which led to the problem. A simple cable adjustment is required here.

If this does not help, check the settings. The specified operating rates can be found in the technical passport of the device. Sometimes it is enough to disassemble the machine: wash, clean and reassemble.

The solution to the carburettor problem is to either buy a new carburettor or hire professional service.

A full check of the trimmer drive is subjected to only if manipulation with the carburetor did not give the proper result.

Fuel circulation system malfunction

Lack of fuel circulation in the system can also be the reason why the device does not gain momentum. There are several options for why this happens:

You can fix it yourself. To do this, it is necessary to:

  • remove blockages from the gasoline pump;
  • Upgrade the hoses, fuel circulation pipes;
  • Clean the muffler and the mesh on it;
  • install a new catalytic converter.

You don’t have to worry about these problems. This does not mean that the machine is bad. If the grass trimmer Patriot does not gain momentum, it can be repaired with your own hands without going to the service.

Filling the lawnmower with gasoline and oil

Before you mow grass with a chain saw, you must fill the tool with fuel. Gasoline and oil are used as fuel. Please note, however, that you only need to mix petrol and oil for 2-stroke engines. The four-stroke engines run on pure gasoline, as their design has a separate container. the oil sump. Due to the absence of an oil sump in 2-stroke petrol trimmers, you will only need to fill the tank with petrol and oil.

It is recommended to use AI-92 gasoline as fuel. In order not to make a mistake in the choice, you need to read the instructions offered by the manufacturer. Often most manufacturers recommend using AI-92 fuel, and only some recommend pouring AI-95.

Gasoline must be diluted with petrol at a ratio of 1 to 25. That means you have to add 40 ml of two-stroke oil to 1 liter of petrol. But it’s not so clear-cut either. The proportion of 1 to 25 is universal, but there are different values for each model of tool. These values are also specified in the manual from the manufacturer. For more details on how to properly dilute gasoline and oil in the lawnmower, described. After diluting the gasoline and oil, fill a full tank and get to work.

That’s interesting! When filling a four-stroke lawnmower, it is necessary to fill the tank with pure gasoline and fill the oil reservoir to the maximum level.

STIHL FS 55 lawn trimmer. model design

The STIHL brushcutters feature excellent balance and a well-conceived component system. The model is powered by a proprietary 1-cylinder 2-stroke gasoline engine with an enhanced forced-air cooling system. STIHL ElastoStart is the STIHL proprietary handle for starting the engine. It has a unique safety feature that eliminates the risk of kickback or jerking when the cable is in motion. The STIHL ErgoSrt easy-start system is included in the machine’s construction to make starting the machine much smoother. It consists of a special spring that is located between the engine crankshaft and the starter coil. The spring equalizes surges when starting the motor, protecting its parts from increased wear.

The model is equipped with an enlarged carburetor by Japanese brand Walbro. Its walls are coated with a protective nickel alloy, which prevents increased wear and heat of the unit.

The STIHL FS 55 is equipped with an enhanced electronic ignition system. It guarantees the engine stable operation and maintains constantly high voltage, required for a more efficient combustion of the fuel mixture. This greatly reduces the exhaust emission.

A reinforced shaft with sturdy gears transmits the power from the engine to the gearbox of the grass trimmer. The STIHL FS 55 is designed by the manufacturer with a bicycle handle to make it easy to use on a regular basis. The latter includes a multifunctional handle equipped with all the buttons and switches necessary for operation.

To allow the operator to work in comfort on the site, the manufacturer has equipped the STIHL brushcutters with a sturdy shoulder strap. The operator is protected by a durable plastic cover. The sidewalls are reinforced with ribs to protect the unit from rock impacts.

Grass trimmer technical specifications

STIHL FS 55 lawn mower is popular among gardeners due to the increased factory parameters. In proprietary equipment, the model has the following technical characteristics:

  • factory engine power. 1 l. с. at 8300 rpm;
  • fuel tank. 330 ml;
  • coverage when mowing cord/blade. 42/23 cm;
  • allowable cord diameter. 2 mm;
  • The operator’s acoustic impact is 95 dB;
  • The vibration indicator is 5.8 m/s2;
  • weight 6 kg.

With a total length of 1.7 m, this STIHL garden tool is ideal for use in large ornamental plantings and other hard-to-reach places.

Fixing the reasons for not getting the gasoline pump

The fuel mix must be precisely mixed with petrol and oil in the correct proportions. In this case you cannot use another brand of fuel. To prevent dirt from getting in, leave the gasoline in a cup or metal container for 2 days. Do not use plastic containers for storing fuel. Oil measured accurately with a medical syringe without a needle. Use only freshly mixed fuel, do not leave spent fuel in the tank. If the engine is unruly, the gasoline stops when you press the gas, it’s probably the culprit fuel.

STIHL FS 55 STIHL grass trimmer mower Urging, throttle, carburettor overhauled Thank you for watching

STIHL FS55 lawn mower carburetor repair

Replacing the o-ring and gas pedal in the carburetor of the STIHL FS55 lawn trimmer.

Gasoline does not start when hot. pull the throttle trigger and pull the cord sharply several times until the engine begins to run, then press the trigger. Do not start. specialized repair is necessary.

Check the ignition system if the gasoline pump fails to start in sequence:

  • remove the carbon and dirt from the candle, dry it, set the gap of 1 mm;
  • connect to high voltage wire and check the spark by pulling the starter several times;
  • if there is no spark, check the integrity of the high-voltage wire;
  • replace spark plug;
  • dry the spark plug passage;
  • At the same time check the operation of the ignition coil, it is defective if the working spark plug does not spark.

If the gasoline pump ignition coil fails to start hot, stalls, runs intermittently.

Clean or replace the air and fuel filters will ensure the proper flow of ingredients going into the carburetor. Air filter can be washed in soapy water or replaced. If nylon cloth is used, it is washed, the porous felt filler is replaced. Fuel filter is modified carefully, leaving the intake nozzle open. Whether the air filter needs to be replaced, can the engine be started with the air cleaner removed. Do I need to change the grid on the fuel supply if the gasoline pump won’t start, a dry spark plug will tell you.

Breather, gas tank air supply port. If it is clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be blown with air or cleaned with a needle. The exhaust duct must be cleaned, the muffler’s wiping mesh must be removed.

Instructions on how to mow grass with a chainsaw and trimmer

With the onset of spring vegetation appears on garden plots and household plots and must be dealt with. Ornamental grass needs to be mowed with a lawnmower, but lawnmowers and grass trimmers are ideal for cutting weeds and other large overgrown vegetation. These are prototypical hand-held mowers, the use of which requires some skill. How to correctly mow with a STIHL brushcutter according to instructions. not many specialists know. If you have this question, it’s time to know how to mow.

The basic steps on how to start a STIHL brushcutter:

  • Before operating a gasoline grass trimmer, it is worth reading the manual and check the STIHL grass trimmer for each part.Then you can reassemble it.
  • The preparatory fuel and filling up is an important step. Prepare the mixture in a measuring cup. Fill it with gasoline and oil in the specified ratio. Use the funnel to pour the mixture into the fuel tank.
  • At the first start, turn on the ignition, without opening the air damper. You should put the device on a flat, smooth surface for stability. Now. pull the cord out sharply 3 to 5 times. The air damper can be opened whether the engine is running or not.

It can take up to 15 pulls for the first start. After starting the engine, let it idle for a few seconds to warm up. After a while, it is stopped with the Stop button.

These instructions are universal, because to start a STIHL lawnmower, you need to follow the same steps.

In the case of starting an electric grass trimmer, everything is much easier: you need to read the instructions and act according to them. Instead of fuel, there is electricity. The unit runs on the mains, so it is important to provide enough power so that the grass trimmer can gain speed.

After each use, both gasoline and electric trimmer requires a thorough inspection.

If you follow the instructions, you can quickly do something about a minor malfunction yourself. But sometimes you can’t start the machine with your own hands. In this case, it is better to seek professional help, especially if it relates to the problem with the engine and the development of the revolutions of the grass trimmer or lawnmower.

If you have once purchased a trimmer for grass, working with gasoline, then you probably had to deal with the problem of turning on the trimmer for grass, as well as with such a problem, as a gasoline trimmer does not gain momentum.

That is why this article was created.

So, what to do if the grass trimmer, which has been working for you for several years, suddenly just stops picking up speed, and the motor simply stops working?? In this case, you and I should consider a number of problems associated with stopping the motor.

The motor can stall under various circumstances. Sometimes the cause of incorrect operation of the grass trimmer, working on gasoline, is the clogging of the air filter.

Exactly the filter is one of the most important reasons why the work of the gasoline grass trimmer may stop

It often receives a variety of debris, dust particles get there, which also clog the filter, so it needs to be cleaned and washed every month, and maybe more often, it all depends on how much power has a gasoline trimmer for the grass, and how often you use this device.

What mowing heads should be used with a chain saw?

Two types of cutting attachments or cutters are used in the construction of chain saws. These are spools with a fishing line, as well as steel or plastic discs. What is the best choice for working with a gasoline-powered tool. On this site you can find information on how to choose discs and fishing line for trimmers, as well as their types and design features. Let’s briefly consider what types of cutting heads should be used on trimmers and gasoline mowers.

    For mowing soft grass, the line for the trimmer is used, which is wound on a drum or spool. line for trimmer, unlike metal discs, is used where the grass grows next to trees, houses, fences and other obstacles. line for trimmer allows you to make a quality mowing of grass near obstacles, while not violating the construction of the tool

The choice of cutter depends on where the tool is used. If it is planned to work in the homestead area, then a line for the trimmer is chosen, and for mowing grass in the field or steppe, discs with 3-4 blades and more are used, as well as discs with fine teeth.

This is interesting! In most cases, cutters are not bundled with the tool, so the buyer can decide for himself what he needs. a line for the trimmer or a steel disc.

How to use and store your lawnmower

To ensure that the lawnmower starts well in the future it is necessary to store and operate it in good conditions:

  • During operation, carefully monitor the cooling system, thoroughly and timely clean the channels in the housing, as well as the starter ribs;
  • if necessary, use solvents, kerosene and other detergents for cleaning;
  • Do not clean the tool “hot”. let it cool down;
  • follow the operating instructions carefully or you risk overheating the motor;
  • if you do not plan to use the mower in the next month, drain the fuel mixture from the mower, t. к. over time, it disintegrates into heavy fractions, which will definitely clog the carburetor passages;
  • after draining the fuel, let the trimmer run at idle until it stops, this will help remove the remaining mixture completely.

Do the following steps before winter storage:

  • Completely disassemble the braid, rinse and clean all the parts you can;
  • Inspect the parts for damage; if necessary, repair misalignments, rips, bends, and any other malfunctions;
  • Fill the gearbox with enough oil and clean the air filter;
  • you can partially disassemble the motor, flush, purge, and lubricate all moving parts;
  • In order to lubricate the piston, you need to unscrew the spark plug, raise the starter piston to its dead center, pour some oil into the spark plug hole and crank the crankshaft a couple of times;
  • If you store the mower outdoors, wrap the engine with an oiled rag.

Remember, the careful observance of the rules, will allow you to forget about that bad start lawnmower for several seasons.

If everything is alright with the electrics, check the carburetor.

Grass trimmers have vacuum carburetors. During its disassembly, cleaning or washing you need to be extremely careful. in no case disassemble the lower part of the carburetor, where the primer is. The air filter (it is visible if you remove the protective cover from the carburetor) should be washed with detergents. The best is for washing dishes. After drying we put it back. Flush the carburetor with clean gasoline and blow out all the holes with a pump. The gas line filter should also be washed and then everything should be dried and reassembled. Usually after all the manipulation, the grass trimmer begins to work.

Use of a thin rope instead of a fishing line. is it worth it for a brushcutter??

This thought occurs to almost everyone who has ever had to mow 10 acres of overgrown grass. At first glance, the idea seems good. Cable is stronger than fishing line, doesn’t wear out as much. But it’s not that simple.

STIHL FS55 lawnmower carburetor repair

STIHL FS55 Lawn Mower. replacement of the o-ring, gas pedal in the carburetor.

If we objectively analyze the reviews of STIHL and Husqvarna chain saw owners on different forums, we can draw the general conclusion that these models are approximately at the same technical level in terms of reliability. But if you compare lawnmowers for safety, convenience, some consumers prefer the Husqvarna brand.

The dashboard of a Husqvarna brushcutter is bigger, the engine is fully covered with plastic, the machine starts more smoothly and picks up necessary revolutions more easily. All the nodes are optimally easy and quickly repaired.

STIHL starts worse, it sounds sharper, the plastic color gets dirty. STIHL chain saws have maintenance-free gearboxes that do not require additional lubrication. A Husqvarna gearbox, on the other hand, must always be lubricated in order to guarantee a long service life. STIHL piston group can cope with a low-quality fuel mixture without breaking.

A big plus of STIHL trimmers is the ergonomic vibration-absorbing pads that you can work with for a long time without unpleasant feelings. STIHL mowers have 20% lower fuel consumption and 70% fewer emissions. It has been said that the ignition on the Husqvarna is actually a serious disadvantage when it comes to safety.

STIHL chain saws are priced much lower than Husqvarna models. Nevertheless, the models of both brands are in high demand, so they have the right to exist. And what choice the consumer will make, will depend more on personal preferences than specific technical characteristics.

STIHL FS 55 VS Husqvarna 128R chain saw comparison

Particulars of use, maintenance

You will find detailed information on the design, operation and functions of the STIHL grass trimmer in the instruction manual for each model. Strict adherence to the manufacturer’s recommendations greatly extends the life of your hand-held mower.

  • STIHL brushcutters use a 50:1 mix of STIHL 2-stroke motor oil and AI 92 brand gasoline.
  • There are several brands of brand oil, the STIHL HP Ultra is considered the best. The correct mix ratio is 25:1 if you use a brand-name engine oil.
  • The ready-to-use fuel mix should not be stored for a long time (no longer than 1 month), unlike the original STIHL MotoMix fuel mix, which retains its characteristics for up to 2 years.
  • The transmission is lubricated with STIHL grease and checked after every 100 hours of operation. The air filter is usually changed annually.
  • Sharpening metal cutting tools as needed, a few filing motions are usually sufficient.

Lawn mower carburetor adjustment

Mower carburetor base. duralumin housing. It contains a diffuser (orifice with internal circuits). The air is forced through this hole. The oxygen (air) flow rate depends on the cross-section (orifice) of the diffuser.

The diffuser is equipped with fuel channels. How to adjust the carburetor on the brushcutter carburetor adjustment in practice. video. Fuel is drawn from them with the help of the air flow.

Adjusting the carburettor on the STIHL FS 55 lawnmower

Lawn mower carburetor adjustment STIHL

FS 55 Parts Shop

Fuel is sucked into the carburetor system by the pump (its diaphragm). Brush cutter carburetor Then flows through the nozzle on the carburettor. Then liquid flows through inlet and outlet valves of the pump. Is filtered by the grid. flows through the needle valve into the diaphragm chamber.

  • Air flows into the tube with an air baffle (flap). Baffle plate controls the intensity of the airflow.
  • The fuel system is necessarily narrowed by a mixer to speed up the flow.
  • The petrol flows through the float chamber and restrictor tube. Float chamber controls temporary petrol volume. The float chamber has a neutral pressure level, but the tube with constriction has a small pressure level. Due to the pressure drop, the fuel flows through the nozzle.
  • Acceleration of the air stream promotes the transfer of the fuel (petrol) and its atomization. Eventually air-fuel mixture of needed proportion or density appears.
  • The air-fuel mixture enters the cylinder of the engine through the fuel tube.

The area of the choke opening determines the level of air density in the system. The wider the choke is open, the higher the fuel consumption and the more power you get.

Simply put, the adjustment of the carburetor on the gasoline mower is to create a good fuel consistency through the correct supply of air.

Instructions for users

Before using any petrol-powered tool you should run it in first. During this time, the moving parts are lapped to reduce resistance. Since this stage takes place at low revolutions, it is easier for a beginner to master such equipment.

Before starting the work, the mixture should be prepared. Its parameters and the materials used are specified in the technical documentation for the product. It looks approximately as follows: 2.5 liters of 95-grade gasoline mixed with 100 grams of STIHL oil from the red package. This procedure should be carried out in a container that is resistant to corrosive liquids. A simple metal canister will not do because of rusty areas that are not detectable inside. Corrosion particles, getting into the carburetor, clog it, which leads to the failure of the part.

During the warranty period the lawnmower needs maintenance and adjustment of the carburetor. It is recommended to do this in an authorized technical center.

stihl, grass, trimmer, does

Pluses and minuses of the model:

Naturally, the list of positive points should include the verification of the brand itself.

  • The need to constantly check the fuel level;
  • Small motor life;
  • Low power;
  • Expensive;
  • meager equipment.

The presence of not particularly disastrous shortcomings of the model does not have a negative impact on the popularity of the unit, because the perfect technique simply does not exist.