Petrol mower Stil fs 38 does not start

Petrol mower Shtil Fs 38 won't start

If you often encounter the need to mow grass in this area, then modern devices like trimmers or lawn mowers are used specifically for this purpose.
Among other solutions on the modern market are gas mowers, with the help of which you can, of course, maintain the surrounding area in a well-groomed condition. For one book, one of the fundamental advantages of a lawn mower is that it is not tied to a power source, following the principle of electronic units. However, such equipment can be used even on uneven areas and in inaccessible places, this should include areas under bushes.

The design of the Shtil FS 55 lawn mower is clear to you if you intend to operate the equipment, and even more so to repair it. The gasoline engine in this unit is almost the same as in the chainsaw. But the last tire is fixed to the motor gearbox with a long tubular rod. Inside there is a shaft that transmits torque from the motor to the working tool. This design is suspended on a belt that is thrown over the shoulder. This allows you to hold the tool suspended, which is important when the weight of the chainsaw is sensitive.

A handle is fixed to the rod of the unit; of course, it is used to move the end of the rod with the working equipment. The petrol mower “Stil FS 55”, a repair manual for which is presented in the text of the article, has a protective shield in the form of a casing, which prevents injuries during operation. The instrument itself is a round drum with a thick fishing line coming out of holes on both sides of it. When the drum spins, the line is pulled under the influence of centrifugal force and hits the grass, cutting it.

Petrol mower "Stil FS 55", technical properties will be presented to you below, has a fast-wearing nylon line. It is updated from time to time by unwinding the reel, which is located inside the drum.

Carburetor repair for STIHL FS55 lawn mower

The above-mentioned equipment option costs RUB 13,490. It is essentially a premium device. Thanks to its use, there is an option to care for the territory on a large suburban site. The equipment can handle young and old grass, reeds and weeds, as well as young bushes.

Buyers also like the bicycle handle, which increases ease of control. During operation, your hands will be spread wide apart, making it easier to control the unit. It is very maneuverable. Buyers like that the handle and strap can be adjusted to suit the operator's needs.

The tool has an option to easily configure for comfortable implementation. The controls are located on one handle. You won’t be reaching anywhere, everything is placed under the palm of your hand. The Shtil FS 55 petrol mower, according to consumers, is also comfortable because it has a pair of protective covers, one for the knife, and the other for the fishing line. The casing for the latter has a narrowing at the rod.

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The unit is serviced by only one person; however, there should be no third parties in the area with a radius of up to 15 m. Otherwise you will always get injured due to thrown objects. Starting the engine of the Shtil FS 55 lawn mower, the properties are presented in the text of the article, should not be done manually. After releasing the gas lever, the cutting tool will move automatically over a period of time. Flammable materials should be kept away from the hot flow of gases and the surface of the hot muffler, because this may cause a fire.

The lawn mower runs on gasoline, which simply ignites. Therefore, while refueling, it is harmful to smoke nearby. Before refueling, the engine is turned off. It is not recommended to carry out such manipulations until the engine has cooled down, because the fuel may overflow and begin to pose a fire hazard.

The fuel tank lock is opened with special care, because excess pressure will cause fuel to splash. Petrol mower "Stil FS 55", the instruction manual is busy, you can study it before you start using the device, it is refueled in well-ventilated places. If fuel is spilled, the device should be immediately cleaned of it so that it does not get on clothing, otherwise the latter should be changed immediately.

Carburetor Troubleshooting

Carburetor problems, as a rule, consist of clogged jets and other elements. To repair, you need to disassemble the unit and clean it. The carburetor may need additional adjustment.

You can clean the jets and fuel channels using a pump or compressor. For adjustment, 3 screws are usually used:

maximum speed (H);
minimum speed (L);
idle speed (LA).

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The repair instructions are as follows:

Fully tighten screws H and L.
Unscrew screws H and L 1 turn, accuracy plays a significant role.
Start the trimmer and leave it running for 10 minutes to warm up the engine.
When the engine warms up, turn the gas to full.
Release the throttle and set idle speed (LA). Tighten the screw after the tool begins to rotate until it stops.

Where to start diagnosing a lawn mower

If the lawn mower does not start or stalls immediately after starting, it is necessary to sequentially check all the main components and assemblies. The verification algorithm is as follows:

Fuel tank (fuel quality);
Candle and candle channel;
Air filter;
Fuel filter;
Breather;
Exhaust channel.

These nodes are most often the source of the main problems, which can be eliminated after a thorough inspection.

Checking the fuel mixture

Before starting the gasoline scythe engine, check the availability and quality of the fuel mixture. Don’t save money, don’t be greedy, and don’t be “clever” in this matter. Repairing or replacing the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). The oil-fuel mixture must be prepared strictly according to the instructions. Calculate its quantity based on real needs. The excess gasoline remaining after work loses its quality over time.

We diagnose the spark plug and spark plug channel

If the quality of the fuel mixture is not in doubt, and the lawn mower stalls when starting, then the cause may be a flooded spark plug. Here, a regular spark plug wrench (surely every motorist has one) and a spare spark plug are suitable for repairs.

We unscrew the candle and wipe it;
Dry it thoroughly (do not heat it);
We drain the excess fuel in the chamber through the spark plug hole and dry it;
We clean the old candle from carbon deposits using a file or a lady’s nail file;
We set the gap with a distance of 1 mm (you can check it with any coin);
We return everything to its place and try to start the trimmer.

You need to dry the canal for at least 30–40 minutes. Otherwise, there is a risk of re-filling a new spark plug.

If the spark plug is working, the socket where it is located is completely dry, and the lawn mower does not want to start, lubricate the threaded connection with gasoline. It should be slightly moist. No matter how wonderful a spark a candle produces, there is simply nothing to light up in a dry chamber.

If the trimmer engine still does not start, a reason such as lack of spark due to poor contact between the spark plugs and the high-voltage wire should be excluded. If the connection is good, but there is still no spark, most likely your ignition unit has failed. Here you won’t be able to do without a specialist, since the part is not repaired, but sold as a single unit.

Diagnostics of lawn mower filters

Another reason why a gas scythe stalls may be the air filter. To eliminate this, try removing the filter and starting the trimmer without it. If it works out, then you will have to change the air filter to a new one, or at least blow out and thoroughly clean the old one.

A gasoline trimmer may not start due to contamination of the fuel filter. This is the next stage of our algorithm. Here we check the condition of the filter element and, if necessary, replace it with a new one. When replacing, try not to leave the suction pipe completely without a filter; this is prohibited by any operating instructions. Haste can result in repair of the engine piston group.

Factory model parameters

The Shtil petrol mower in this configuration is distinguished by its solid factory parameters.

Trimmer specifications include:

volume of a standard internal combustion engine cylinder – 27.2 cm3;
standard engine power – 0.9 liters. With.;
tank capacity for filling with fuel mixture – 330 ml;
fuel consumption when operating under high loads – 320 ml/h;
the maximum possible mowing diameter when using fishing line is 38 cm;
cutting diameter when using a knife – 25.5 cm;
maximum sound pressure when working with a metal knife is 109 dB.

The Stihl FS 38 trimmer is small in size and light in weight. The weight of the model when ready for use is 4.1 kg, and the length without cutting equipment is 147 cm.

More complex reasons for lawn mower failure

If the step-by-step troubleshooting algorithm does not produce results, and your scythe still does not start or stalls, it is worth inspecting the carburetor and the engine itself. A clogged carburetor can be one of the reasons for unstable operation of the tool. There are three main problems here:

Clogged channels or jets. All this is cleaned with special washes or blown with a powerful jet of compressed air from a compressor. Do not use needles or wire, as the bores may be damaged;
Worn carburetor gasket. The solution is to replace the failed gasket;
Violation of tightness. To check this indicator, you can use a regular household tonometer, replacing the pressure gauge with a suitable one. Keep an eye on the readings: if they do not change, everything is fine, but if the pressure starts to drop, it means that some part of the carburetor is faulty. You'll have to find it and replace it with a new one.

If everything is in order with the carburetor, then the gasoline trimmer may not start due to wear on the piston group. If chips, scratches or burrs are found on the piston or cylinder, they should be replaced. Piston rings must be checked. A slight luffing of the piston when the connecting rod swings indicates that it is time to change the rings. This procedure is best left to the service center specialists.

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Rules for operating and storing lawn mowers

In order for the lawn mower to start well in the future, you need to provide it with good storage and operating conditions:

During operation, carefully monitor the cooling system, carefully and promptly clean the channels in the housing, as well as the starter fins;
if necessary, use solvents, kerosene and other detergents for cleaning;
Do not clean the tool “hot” - let it cool down;
strictly follow the operating instructions, otherwise you may overheat the engine;
if you do not plan to use the lawn mower in the next month, you need to drain the fuel mixture from it, because over time it breaks down into heavy fractions that will definitely clog the carburetor channels;
After draining the fuel, let the trimmer idle until it stalls, this will help completely remove the remaining working mixture.

Before winter storage, take the following steps:

completely disassemble the braid, rinse and clean all the parts you can;
inspect the parts for damage, if necessary, eliminate distortions, tears, bends and any other defects;
pour a sufficient amount of oil into the gearbox and clean the air filter;
you can partially disassemble the motor, wash, blow and lubricate all moving parts;
in order to lubricate the piston, you need to unscrew the spark plug, use the starter to raise the piston to the dead center, pour a little oil into the spark plug hole and turn the crankshaft a couple of times;
If you store the lawn mower outside the house, wrap the engine with oily rags.

Remember, careful adherence to the rules will allow you to forget that it is difficult to start a lawn mower for several seasons.

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buy for home. Let's compare the 4 most popular braids in Ukraine: 1) STIHL

FS 55 2) mechanical - settle and store gasoline for work not in metal containers and for no longer than 1 (one) month, otherwise it oxidizes and loses its properties; chemical - impurities and additives should not be present (they have different rates, degrees and temperatures of combustion). Old gasoline turns yellow or red, and the impurities have a strong smell of bitterness (for example, creosote) or acid (for example, methyl alcohol). The proportion of the fuel mixture is 1:50 (2%) or 20 ml/cm3 of oil per 1 liter of gasoline. For example, pour half a measure of gasoline into a transparent plastic bottle (1 l), then use a medical syringe (20 ml/cm3) to introduce two-stroke oil and mix, add gasoline and mix thoroughly. If the quality of gasoline is questionable or the working conditions are difficult, then the amount of oil can be increased to 22-25 ml/cm3. Shake the mixture before each filling! Store the resulting fuel for no more than two weeks! If the color of the mixture has changed (from sea green to, for example, brown), then it is not recommended to use it!

Portal about construction

Gasoline trimmers are absolutely indispensable when eliminating weeds in the backyard, as well as when making hay. Yes, as grandfather’s “Lithuanians” they also showed themselves to be indispensable helpers. There’s just one problem: even the old braids had to be repaired after the season.

What to do if the gasoline trimmer breaks down? Repairs in a service center are not a cheap pleasure. Is there a chance to somehow correct the situation on my own?

Performance properties

The STIHL FS 38 portable trimmer belongs to the amateur class. It is designed for caring for small garden plots. Such lawn mowers become indispensable assistants if you need to tidy up an area where it is impossible to use a wheeled lawn mower. For example, in hard-to-reach places, under trees and bushes, near flower beds and fences. The scythe is equipped with a simple and reliable 2-stroke engine of its own production. Carrying out work on a mixture of gasoline and motor oil. This engine provides simplicity of design, operation and maintenance. As well as high power and torque.

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