STIHL lawnmower – how to change. Basic recommendations

Maintenance of STIHL lawnmowers

It is human nature to ennoble the place where he spends the lion’s share of his time. Residents of cities resort to the services of designers, or try to change something in their homes, buy new furniture, wallpaper, so that when you come home after a hard day, you can mentally relax and unwind in a comfortable environment. Residents of their own houses, located outside the city, have very different concerns and requirements. It is necessary to mow bushes, grass, various dead wood, carefully monitor the condition of the homestead plot and garden. It is clear that this requires somewhat different means of achieving comfort. And then another feat of engineering comes into play. STIHL mowers.

The history of the German brand begins in 1926. In its early days the company was involved in the production and sales of various components for washers and steamers. It all started, as for many companies, with a small production and a narrow focus, allowing the company to focus on the quality of products.

In the early 1930s, the first STIHL chainsaw was launched, already at that time distinguished by its convenience and functionality. The company develops rapidly, constantly introducing new tools, which enables it to enter the international market. And already in 1931, the first regular deliveries of the products to Russia are organized.

Today the company has expanded its operations into over 160 countries, opening new centers and production facilities in Switzerland, China and many other countries. It is quite understandable, because the range of the company is impressive: power drills, gasoline-powered sprayers, mowers, gasoline grass trimmers, chain saws and much more. It should be noted that Shtil chain saws are very popular thanks to their functionality and affordable price.

STIHL FS38 mower. Model description. Features of operation, maintenance

The STIHL FS38 is a lightweight mower. the optimal complement to a heavy-duty mower for tackling hard-to-reach areas, along paths, under trees and bushes. You can use the STIHL ride-on mower to quickly mow soft grass on lawns and lawns and keep your lawn tidy at all times.

STIHL FS38 specs

  • Model FS 38 Autocut.
  • Weight. 4.1 kg (without cutting attachment).
  • Length of brushcutter. 147 cm (without cutting equipment).
  • Engine type. two-stroke.
  • Cylinder volume. 27,2 cc. see.
  • Power. 0,9 l.с.
  • Fuel type. petrol.
  • Gasoline consumption. 0,32 l/h.
  • Fuel tank capacity of 0.33 l.
  • Handle. circular handle.
  • Mowing diameter. 380 mm.
  • Max. working head rotational speed. 9500 rpm.
  • Anti-vibration system installed.
  • Easy start system. installed.
  • Cutting tool. AutoCut C 5-2 cutting head (included).

Model description

The STIHL FS38 is the lightest mobile mower in its class.с., it is designed for home use.

  • State-of-the-art electronic ignition system ensures reliable starting and smooth engine performance.
  • A fuel pump enables the operator to fill the carburettor with fuel if necessary.
  • Optimal maneuverability is ensured by the D-shaped handle, which makes the STIHL brushcutter easy to control in tight working areas.
  • All controls are on the multi-function handle (R) for safe and reliable operation.
  • With the AutoCut C5-2 mowing attachment, the cutting diameter is 380 mm.
  • Ergonomic shoulder strap to rest the STIHL brushcutter on your shoulder and make it easy to control.
  • Low weight (4.1 kg).), compact size and reasonable basic equipment. these features make the STIHL 38 an extremely comfortable mower to operate.

Special features

Every STIHL lawnmower is designed specifically for the intended use of the engine power. We strongly advise against making any additions or improvements to the brushcutter. Therefore, before you buy a STIHL lawn mower, it is necessary to clearly determine the upcoming front of work.

It is absolutely impractical to buy a powerful trimmer for grass for the occasional mowing in the lawn, for this is quite enough lightweight gasoline or electric models mowers.

When operating it is important:

  • Work/rest time in 20-minute intervals.
  • Use high-quality gasoline of AI-92 or higher.
  • Use original STIHL engine oil (50:1) for the fuel mixture.
  • When running-in the engine up to 2 or 3 full fills of fuel tank, do not operate at maximum load.
  • If you plan to shut down the STIHL brushcutter for the winter or for an extended period of non-use, always drain the gasoline from the fuel tank to avoid damage to the engine.
  • To ensure stable operation check the condition of the fuel filter systematically clean it or replace it with a new one.
  • To prevent serious malfunctions, do not clog the air filter.
  • Observe the safety precautions when operating a STIHL lawn mower.

A long service life and trouble-free operation of your STIHL brushcutter is ensured by strict compliance with the operating instructions.

STIHL FS38 lawnmower instruction manual

Model advantages and disadvantages

The STIHL FS38 mower is the best choice for mechanized grass-cutting in confined spaces. Clean and neat cutting, mobility, lightness and high performance. huge advantages compared to a manual mower.

stihl, lawnmower, change, basic, recommendations

One of the problems owners often report is that the STIHL on-the-go mower just shuts down after starting it. If so check the fuel line for blockages. Another reason could be improper adjustment of the carburetor, which can be easily fixed according to the service recommendations.

The STIHL FS38 mower is priced at around 9 000 €. Of course, you can buy cheaper, often nondurable analogues on the market.

A well-known brand guarantees the reliability of certified products, as the owners of the equipment note.

STIHL FS38 lawn mower, a common sore

Owners reviews


“I bought a STIHL FS38 brushcutter for mowing around 10 acres of grass continuously. After 7 years in the field it’s easy to maintain the lawn with this equipment. The engine is quite economical, of course, for clearing bushes its power is not enough. Comfortable handle on the shoulder, it’s comfortable to work”.

STIHL petrol grass trimmers won’t start

What to do when gasoline grass trimmers do not start?

Gasoline grass trimmer. a surprisingly useful tool with which you can mow not only a small clearing in front of the house, but also a whole lawn of large sizes. Unfortunately, nothing is infinite in this world, and therefore you may encounter the fact that gasoline grass trimmers do not start.

It often happens that the users of this kind of machines are trying to “save money” by filling the tank is not fuel with a conventional octane number, and something incomprehensible that has almost ten years standing in a plastic canister.

Main. fuel mixture!

In this case the remains of the plastic dissolved in the brutal environment make such awful things in the combustion chamber that you can’t do without a complete overhaul of the mechanism for sure I bought myself a new gasoline trimmer for the grass how to start the video you can learn. But you will definitely always remember how to properly store fuel.

One Year Update of Stihl iMow robotic lawnmower impressions pros & cons

What to do when the fuel was exactly normal, the spark is, but gasoline grass trimmer does not start? It is possible that you simply filled the spark plug with gasoline. If this is the case, unscrew the plug, wipe it with a clean cloth and dry it. By the way, it would be nice to check the plug itself for serviceability.

Properly perform a cold start!

It is not uncommon for gasoline grass trimmers do not start after trying to “put them into operation” after long storage. How to start a STIHL grass trimmer Failure to start in this case is often caused by improper user action.

If you are faced with exactly this phenomenon, then at a cold start you need to close the choke, and then pump a small amount of fuel mixture into the carburetor. Then pull the starter handle until you feel resistance, then start the grass trimmer with a sharp and vigorous motion.

STIHL FS 55. Starting a lawn mower in the cold

How to start a STIHL FS-55 cold gasoline grass trimmer correctly. This video shows how to start the brushcutter.

Properly starting a STIHL fs 130r lawnmower when cold

Master class from the online store elektro-benzo tools MasterPlus STIHL FS 38 lawn mower (trimmer for grass) video.

After a few jerks, it will start and then stall, which is normal. After moving the choke to the working position, start the tool again and start working.


There are not only situations when gasoline grass trimmers do not start, but when, after starting, they work for a couple of seconds and then stall. Inspect the spark plug again: if it is “covered”, and this situation is repeated even after wiping and drying it, proceed to the “revision” of the air filter.

It is probably completely oily and needs to be replaced. If everything is normal with the filter, it may turn out that the ignition coil is broken.

If the grass trimmers gasoline does not start, and you have done all of the above, the muffler may be clogged. How to start a STIHL STIHL 180 chain saw properly Remove it, burn it with a torch and then you can shake off the soot easily.

The carburetor again.

Even if your weed trimmer won’t start after all this abuse, you can’t do without disassembling the carburetor. It may very well be that it is a glitch in the carburettor needle. In any case disassembly and washing of this capricious mechanism will not prevent.

In general, when the trimmer for grass began to be capricious and throttle, it is advisable to carry out a complete preventive maintenance: completely change the fuel mixture, try a different oil, as well as be sure to change the plug. Experience has shown that in many cases it is cheap, poor-quality spark plugs which are to blame.

We’ve looked at the most common reasons why a grass trimmer won’t start. If the case is something more “exotic”, do not avoid a trip to the service center. How to Start a Grass Trimmer Grass trimmer How to properly wind a Lider Bc 415 Grass Trimmer Video. You will surely find the smaller and more obvious faults on your own.

How to start a gasoline grass trimmer

The process of commissioning a lawn trimmer, whether you bought it now or took it out after winter storage, the rules listed below will allow you to avoid major mistakes that can damage the tool.

Suppose you have just bought a gasoline grass trimmer. Take the manual out of the box and see if all the parts of the lawn trimmer that are listed are available to you. After that you can proceed to the assembly.

Preparation of fuel mixture and refueling

Next, take a measuring container, with a scale marked on it, with its help you can prepare the mixture as accurately and quickly as possible. Check the manual for the gasoline brand and 2-stroke oil https://ru-sad.The ratios for gasoline and oil in the fuel tank of your lawn trimmer are recommended by the manufacturer. Pour petrol and oil into the fuel mixture tank, according to the proportions given in the manual. Then pour the ready mixture carefully, through a funnel, into the fuel tank of the grass trimmer. The gasoline to oil ratio must be exactly as written in the manual. This is a very important moment!

To start the lawn mower with the engine cold

To start the lawnmower for the first time, locate the air damper lever and put it in the closed position. Turn on the ignition on the handle. If your model has a manual fuel pump, popularly called a suction pump, press it 3 to 5 times until you see the fuel mixture inside the primer. The machine is now ready to be started. Position the grass trimmer on level ground to ensure it is in a stable position. Pull the starter rope out gently until you feel resistance and then pull the cord toward you 3 to 5 times in a sharp movement.

If the engine starts after 5 pulls, open the choke. If not, open the choke anyway (if the choke is open and you keep trying to start the engine, the fuel will flood the spark plug and you will have to dry it, which is an unnecessary waste of time).

Fitting the line on the STIHL Fs 38 grass trimmer

For STIHL FSE 52, FSA 45, FSA 56. Double-sided. Mower line diameter is 1.6 mm. The length of the mowing line adjusts automatically when the mower makes contact with the ground.

For STIHL FSA 65, FSA 85. Double-sided. The mowing line is 2.0 mm in diameter. The length of the mowing line adjusts automatically when the mower makes contact with the ground.

STIHL RMA 370 36 Volt Lithium Ion Lawn Mower | Weekend Handyman | #StihlUSA

For STIHL FS 38/40/45 C-E, FSE 60/71/81. The diameter of the cutting element is 2.0 to 2.4 mm. The length of the mowing line adjusts automatically when the mower makes contact with the ground.

For STIHL FS 55/56/70/80/85/87/90/94/100/111/120/130/131/250, FSA 90, FR 131 T. Two-tube. The diameter of the mowing line is 2.44 to 2.7 mm. The length of the mowing line adjusts automatically when the mower makes contact with the ground.

For STIHL FS 55/56/70/80/85/87/90/94/100/111/120/130/131/250, FR 131 T. Two-tube. Fast filling of the cutting element. The mowing line is 2.44 to 2.7 mm in diameter. The length of the hair growth mower line is automatically adjusted when the mower comes into contact with the ground.

For STIHL FS 120/131/250. Mowing line diameter is 2.7 to 3.3 mm. The length of the mowing line adjusts automatically when the mower makes contact with the ground.

For STIHL FS 350/400/400/560. Mowing line diameter is 2.7 to 3.3 mm. The length of the hair growth line adjusts automatically when the mower comes into contact with the ground.

For STIHL FS 55/56/70/80/85/87/90/94/100/111/120/130/131/250, FSA 90, FR 131 T. Two-tube. The cutter line has a diameter of 2.4 mm. Automatic mower line adjustment for optimum cutting length.

For STIHL FS 300/400/450/490. The filament diameter of the 2.4 mm mowing line. Automatic line adjustment for optimum cutting lengths.

For STIHL FSA 45. Two plastic blades. Universal cutting tool.

For STIHL FS 38/40/45. Three plastic blades. Universal cutting tool.

For STIHL FS 38/40 / 45. Dependable all-purpose tool for pruning and scarifying. Equipped with three movable plastic blades. Only to be used with the special blade guard or the universal blade guard.

For STIHL FS 55/56/70/80/85/87/90/94/100/111/120/130/131/250, FSA 90, FR 131 T. Three plastic blades. Universal cutting tool.

For STIHL FS 350-490, FS 560. Universal cutting tool for mowing weeds around obstacles and for cutting small bows. With three movable plastic blades. High performance with plastic blades.

For STIHL FS 38/40/45/50. Two oblique threads (6 cords). Easy insertion of cutter bar. Suitable for different sizes and shapes of hair.

For STIHL FS 55/56/70/80/85/87/90/94/100/111/120/130/131/250/350, FSA 90, FR 131 T. Two oblique strings (12 rows included). Easy installation of cutting element. Compatible with various sizes and shapes of hair.

For STIHL FS 400/450/490 / 560. Four helical threads (12 rows). Easy attachment of the cutter bar. Compatible with various hair sizes and shapes.

STIHL TrimCut trimmer head. Two-row, for mowing and thinning out. Manual adjustment of cutting set length.

STIHL AutoCut trimmer head. Two-row, for mowing grass and clearing the ground. The length of the hair growth line is automatically adjusted when the mower comes into contact with the ground.

STIHL SuperCut three-row trimmer head. Two-row, for mowing and clearing. Automatic cutting line adjustment for optimum cutting length.

STIHL DuroCut 3-D head. Two or four rows, for grass mowing and ground clearance. Easy setup of up to 4 lines. Suitable for different grass sizes and shapes.

STIHL PolyCut trimmer head. Highly versatile cutting tool for clearing and shaping large areas. With two or three movable plastic blades.

When to adjust

You need the carburetor adjustment for the following applications:

  • New engine is new and running-in (4-5 litres of fuel mixture used);
  • The fuel composition (oil and gasoline grade) has changed
  • The weather has changed (got hot, got cold);
  • The air pressure has changed (applies to mountainous areas);
  • after long storage;
  • The load on the engine has increased (after changing tools, etc.).д.);
  • due to vibration, the adjustment screws unscrewed spontaneously;
  • the fuel consumption has increased, the carburetor overflows fuel;
  • the spark plug electrodes are quickly covered with soot (the fuel mixture is prepared correctly);
  • the engine starts and immediately stops or picks up poorly;
  • gasoline does not flow into the cylinder;
  • Large amount of exhaust fumes.

The order of installation of the disk on the grass trimmer

Installing the blade for the grass trimmer is very simple. Use a full wrench to do this, disconnecting the cutting equipment and locking pin Procedure yes.

  • First of all, you should disconnect the electric grass trimmer from the mains, the gasoline. just a muffler. Remove the protective cover on one side.
  • Then you need to connect the holes in the gearbox and shaft to insert the pin and lock the drive.
  • If a hair reel was used, it should be turned clockwise.
  • Then you need to find a nut to tighten the blade.
  • The next step is to install the blades. Grass trimmers often wonder which side to put the disc. This should be done so that the numbers and letters are at the top.
  • Then you need to put the cover on top and over it. the fastening nut, which must be tightened firmly with a wrench.
  • The last step. Install the protective cap.

As you can see the procedure is very simple and the same for many brands, be it STIHL or Husqvarna equipment.

Note! If the owner wants to replace the disk back with a cable, you can install the spool in the same way.

Criteria for selecting a disk

You need to choose a plastic or metal blade, taking into account the area to be treated and the type of grass trimmer. electric or gasoline. The number of blades will depend on how much growth to remove with the tool. You can select the desired blade shape, number of blades and material by referring to the instruction manual of the device. It usually determines which cutters are recommended for certain problems.


It is not recommended to attach metal blades to electric scythes, as the design features make them dangerous for the user This is due to the curved shape of the rod, the lack of locks on the handles and the high rotation speed.

Important! The straight arrow ensures safe use of the grass trimmer at times when the disc rotates against an obstacle. In this situation, it bounces back toward the person, so a curved design can cause injury.

On flexible bar trimmers For safety reasons, plastic blades should be used. Their purpose is to mow soft grass, dry grass. While metal discs are great for tall, dense, tough shoots, shrubs, and tree shoots.


The number of blades is important for a variety of tasks. Thus, two or three pieces are enough to shred the grass. Mowing requires four to eight blades on the disc. In order to kill small shoots of trees and shrubs, the discs should have a large number of fine teeth instead.

sharpening the blade

Regardless of the quality of the disc, over time it becomes dull and begins to mow poorly. If the blades are still relatively new and not practical, you can sharpen them with your own hands.

Important! Sharpening is only suitable for discs that do not have a hard solder. Such parts are discarded and replaced with new ones.

  • Disassemble the grass trimmer, remove the blades;
  • Inspect the blade carefully. If cracks are found, it is better to replace the part with a new one, as further work is dangerous;
  • curved blades can be carefully bent with a hammer;
  • Considering the size of the disk, you need to choose the right file for the metal, this will ensure a more comfortable work;
  • at an angle of 30 ° to equally sharpen all the top cutting edges of the discs;
  • Reassemble the grass trimmer in reverse order.
stihl, lawnmower, change, basic, recommendations

You can use a low-speed grinder to sharpen the disc by installing a medium grit grinder. With this tool, the process will move much faster. For safety purposes, you should wear gloves and a face mask or goggles.

Thus, for mowing grass on gasoline and electric trimmers use plastic and metal discs of different shapes and with different sets of blades. These are selected depending on the type of work to be done and the size of the area to be treated. If the mower blades are dull, they can easily be sharpened or replaced on their own. Even if the procedure is simple, you must exercise caution and take safety precautions to prevent personal injury caused by negligence or damage to the machine. A more detailed description of replacing the blade for a specific model of grass trimmer can be found in the instruction manual or on the manufacturer’s official website. For clarity, the general process flow diagram is shown in the video.

Removing the handle

Disassembling the STIHL 180 begins with removing the handle, which is locked to the chain saw by three rubber buffers. For removing it is necessary to remove plastic plugs from the inside cavity of shock absorbers, then with a strong screwdriver, first press out the upper shock absorber, then the one that is closer to the back handle.

The throttle trigger is located at the rear of the handle and connected to the carburetor through a wire tie. In order to disconnect the cable from the throttle trigger you need to unscrew two screws and dismantle the handle.

When the handle remains on one shock absorber, it is necessary to unscrew the body of the gasoline saw from the inside of the handle and, breaking to the side, remove the body from the last rubber.

The carburettor, silencer and ignition coil

To remove the carburetor, you must have a head for 8 and an extension cord, with which it is convenient to unscrew the nuts fixing the carburetor and the air filter. Before dismantling the carburetor, you must disconnect the ignition wire and air damper rod from the engine control lever and remove the lever, only after that remove the air filter and carburetor.

The STIHL 180 muffler is fitted with two nuts and you have to loosen them by pulling on the muffler and remove them.

stihl, lawnmower, change, basic, recommendations

What else you need to know

Now that you know how to disassemble the grass trimmer spool and refill the trimmer line, here are a few more tips for operating your gasoline or electric mower.

A worn or damaged grass trimmer head at high speeds can fail and even cause serious injury. Before and after use, check the brushcutter’s condition. Constantly check the integrity and serviceability of all parts of the mechanism.

Before winding the trimmer line onto the grass trimmer reel, it’s a good idea to put it in water for a day or a full day. Nylon thread is hygroscopic, which means it absorbs liquid. This makes the mowing line softer and more elastic. First, it will wind more tightly around the reel. But the important thing is that the trimmer line will not be as brittle during cutting as it would be if it were dry. This will significantly increase the running time of one replacement set.

Before you start work, be sure to check that the cutting lines are the same length on both sides. At the beginning of mowing, the cutting ends are shortened to the desired size by the knives mounted on the guard.