Petrol Trimmer Service

Petrol trimmer. Repair and maintenance
The gasoline trimmer has already become one of the main tools in the arsenal of avid summer residents. This device is increasingly becoming indispensable for owners of suburban housing.

Petrol trimmer. Device and repair

Petrol Trimmer Service

Basically, a gasoline trimmer consists of a long tubular rod connected to a gearbox in an internal combustion engine. The inner part of the tube contains a shaft, through which torque is transmitted to the cutting device.

The trimmers come with a cutting line that attaches to the rotating mechanism. During the mowing of the lawn, the latter gradually wears out. Therefore, you have to periodically service the petrol trimmer. Repair in this case consists in removing the old fishing line and replacing it.

Features of operation

Particular attention should be paid to regularly cleaning the air filter from dirt and sawdust, tightening screws and nuts before using the unit.

As for the rotating head, it is recommended to use only special fishing line here, since the use of metal cables or wire as an alternative will lead to rapid wear of the mechanism. Over, the line must have the diameter recommended by the manufacturer of the existing model of gasoline trimmer.

The mowing head also needs periodic maintenance. A worn or deformed element can damage the petrol trimmer. Repair here will require replacing the shaft or gearbox of the unit, which will lead to serious expenses.

Petrol trimmer. Repair and maintenance

The trimmer is ideal for maintaining your backyard. Compared to traditional hand tools, the automatic mower is a pleasure to operate. However, any technique tends to fail. Therefore, sometimes it is necessary to repair gasoline trimmers. Let’s look at what kind of breakdowns you can cope with on your own without resorting to outside help.

Engine failure

  1. Overheat. It manifests itself in engine failure after about 10-15 minutes of continuous trimmer operation. In this case, a rise in temperature can lead to clogging of the cooling fins or the starter grille with lumps of grass and dirt.
  2. Fuel. Sometimes it is not enough to fill the petrol trimmer on time for proper operation. Repairs are often required as a result of the use of insufficient quality fuel. As practice shows, it is extremely undesirable to fill trimmers with fuel with a lower octane number than AI-92.
  3. Clogged air filter. Cleaning of the specified item is a standard activity during routine maintenance of the unit. How to clean a petrol trimmer? Repair in this case consists in thoroughly washing the filter with detergents and reinstalling it.

Replacing spark plugs

One of the most common causes of a gasoline trimmer breakdown is damage or clogging of the ignition element. If the candle has received serious damage in the form of cracks in the body, the spare part simply changes. The work is done as follows:

  • The candle is dismantled with a special key and inspected.
  • If there are deposits on the surface of the body, the latter are cleaned with brake fluid or white spirit.
  • If the candle is critically damaged, a new one is inserted in its place, and then tightened firmly with a wrench.

Fuel supply system

The problem may lie in a clogged fuel hose. Its disconnection should lead to unauthorized leakage of fuel. Otherwise, you will have to clean or replace the fuel filter.

STIHL FS56 Petrol trimmer instruction manual

It is important to remember that the brushcutter is demanding on the brand and quality of fuel and lubricants. Unsuitable fuel and engine oil or an incorrect fuel mixture will cause serious damage to the engine, o-rings, piping and fuel tank. The fuel mixture for Stihl petrol cutters is prepared at the rate of 50 parts of AI-92 gasoline and 1 part of original STIHL oil in a separate container. It is not recommended to store the prepared mixture for more than 3 months.

Some of the wearing parts of Stihl brushcutters are subject to natural wear and tear and should be replaced in time with new ones: air and fuel filters, cutting tools and protective devices for them, spark plug, starter, fasteners for mowing attachments.

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Gas cutter Stihl FS56. Description of the model, trimmer service. Advantages and disadvantages of the model, a review of the Stihl fs56 and fsa FS56 set

Among the lightweight petrol brush trimmers, the STIHL FS56 features an ergonomic two-handed handle. The power of the unit is 1.1 hp, which allows high-quality mowing of grass in medium-sized areas, the destruction of weeds and packed vegetation. The model belongs to the STIHL group of petrol cutters for domestic use.

The Stihl brushcutter line includes the STIHL FSA 56 set cordless scythe with a cordless motor. This model is equipped with an AutoCut 2-2 mowing head, it can work for 40 minutes without recharging, providing a cutting diameter of 28 cm. Unlike petrol cutters, the Stihl FSA 56 cordless brushcutter is much cheaper.

Description of the model FS56 brushcutters

This modification is distinguished by its comfortable equipment, characterized by an optimal angle of inclination of the mowing head, which ensures high quality of mowing. The advantages of the model:

  • The 2-MIX engine delivers high tractive effort.
  • Small size and light weight.
  • Simple easy start-up, the off button has an auto return function.
  • Equipped with the standard AutoCut 25-2 mowing head for confined spaces and a cutting disc for cutting hard grass and overgrown growth.
  • The two-handed (similar to a bicycle) control handle is conveniently adjustable with a screw.
  • The control levers are located compactly, which is convenient when working.
  • The manual fuel pump is operated by simply pressing a button.
  • Safety glasses and a shoulder strap make Stihl brushcutters easier to use and safer.

Advantages and disadvantages

The model is distinguished by its reliability and high build quality. The STIHL FS56 gas cutter is easy to maintain and has high performance. Thanks to the 2-MIX system, the engine is economical in terms of fuel, the emission of harmful substances into the atmosphere is significantly reduced.

Of the shortcomings of the Stihl FS56 petrol cutters, the owners note some difficulties with starting, which are easy to fix on their own, following the manufacturer’s detailed instructions. Sometimes there are malfunctions associated with the carburetor setting.

Features of operation

The Stihl FS56 gasoline scythe is excellent for maintaining lawns, areas, mowing grass in hard-to-reach places near trees, paths.

Recommendations for the maintenance of the Stihl petrol trimmer, the correct installation of the mowing headset, safety during work, self-tuning of some components and working mechanisms are detailed in the factory operating instructions, which can be found by clicking on the link.

Running in.

Run at least one tank of fuel with the engine (no load!) With frequent speed changes (idle. Maximum speed). The next 5 hours of operation in a gentle (50%) load. After running-in, it is mandatory to check the engine speed (using an electronic tachometer in the service center) and, if necessary, adjust them by a specialist.

Maintenance instructions for petrol trimmers and brushcutters

Oil. High-quality two-stroke oil for high-speed equipment (10-15 thousand rpm, about 200 rpm). Do not use oils for motorcycle (low engine speed) or for water vehicles (other cooling system). Their use does not provide the necessary lubrication of the piston group and parts of the entire engine! Petrol. Any pure high-octane gasoline (with the number 92 and above, with a density in the range of 750-770 kg / m3). Fuel ratio. 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 liter), then add oil with a medical syringe (20 ml / cm3) and mix, add gasoline and mix thoroughly. If the quality of gasoline is questionable or working conditions are difficult, then the amount of oil should be increased to 22-25 ml / cm3. Shake the mixture before each refueling. 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.


Engine. The air filter must always be clean (no dirt or sawdust); the foam filter must be moistened with oil. The fuel filter must be checked once a week (replace if necessary). Checking the tightness of nuts and screws. Before starting work. Removal of carbon deposits from the muffler (or its mesh) and spark plugs. If necessary. Angle reducer. Clean every day from dirt (such a “fur coat” does not allow the gearbox to cool normally) and add grease for the gear pair.

Fishing line and trimmer heads. Use only special mowing line. Do not use wire or metal ropes! Install only a line of the diameter recommended by the manufacturer. Wrap tightly around the bobbin, but do not cross the threads. Clean the mowing head from dirt and lubricate if necessary. A deformed or worn head can damage the gearbox and / or the brushcutter shaft.

Cutting discs. Cutting parts must be well and correctly sharpened using the necessary templates and files and observing the angles of the cutting parts depending on the brand of the blade. Turn double-sided discs regularly by 180 ° and wear evenly. A blunt disc or a disc with poor or incorrect sharpening cuts poorly, and thereby overloads the engine, which leads to a rapid reduction in its service life. Protective covers. It is forbidden to work without a protective cover. It is dangerous to the operator’s life and can overload the brushcutter engine. Only use its own protective guard for each type of cutting attachment.

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A haircut. Hold the trimmer head directly off the ground at an angle. The end of the string does the work. Let the string run at its own speed. Do not press the string against the mowed area! This overloads the motor and mowing head. They can break down or melt!

Pruning with a knife. Mow with a pendulum motion from side to side, movement from right to left will be working, and from left to right. Will be reversed. The blade should cut the grass with its left edge (between 8 and 12 on the clock face). Compliance with the above recommendations will extend the service life of gasoline vehicles many times over.

Correct fuel mixture

What the user feeds is very important for a gasoline brushcutter. In this case, the fuel mixture implies a combination of oil and gasoline. Certain requirements are imposed on each of these components.

Only high-quality two-stroke grades should be used as oil, designed for equipment with high operating speeds. There is a taboo on motorcycle products and those intended for water technology. In both cases, it will not be possible to lubricate the parts enough. Stihl, Champion and Husqvarna have proven themselves well.

Any pure high-octane gasoline (from 92 onwards, with a density of at least 750 and not more than 770 kg / m3) is suitable. You cannot store such a product in a metal container, it should not contain impurities and additives. The storage period should not be more than a month.

The fuel mixture is prepared in the proportion of 20 ml / cm3 of oil per liter of gasoline. However, for the first five production tanks of the device, it is necessary to prepare it in a ratio of 40 ml / cm3 for the same amount of gasoline, then switch to the indicated figures.

Shake the mixture thoroughly before refueling. Pay attention to the color. If it turned from aquamarine to dark brown, then you cannot use such a metamorphosis.

How to properly maintain a brushcutter

The device consists of the following mandatory elements:

  • Engine;
  • Cutting discs;
  • Fishing line (trimmer heads);
  • Angle gearbox;
  • Protective covers.

Trimmer care involves monitoring the technical condition of each of them.

Service of cutting discs

If we talk about discs, then you should focus on how carefully the edges of the blades are sharpened. Sharpening must be carried out correctly, otherwise such a disk in operation will load the motor, which will only reduce the resource of the latter. The double-sided discs should be rotated 180 ° regularly to ensure uniform wear.

Line condition monitoring

How to care for the cord part? The most important thing in this business is the use of a specially designed mowing line.

  • The line must be changed periodically;
  • The diameter specified by the manufacturer is set;
  • The winding of the cord is tight, but without crossing the turns;
  • The head must be constantly cleaned of dirt and lubricated regularly;
  • Carefully monitor the degree of wear (otherwise the gearbox or shaft will be deformed).

How to keep an eye on the bevel gear

The first task of the user is to prevent dirt from accumulating on it. This circumstance will not allow the part to cool normally. The second requirement is to use a grease (Husqvarna type or similar) designated for the gear pair. An annual lubrication procedure is usually sufficient.

What you need to know about protective housings

It is forbidden to work without a protective casing. Amateur activities may be dangerous for the user and others. But it is impossible to select such parts from non-branded ones, you must use the one recommended by the manufacturer. A damaged casing should be replaced promptly.

The covers can be mounted both on the rod and on the gearbox. The universal models (working with both a line and a disc) come with two different kohujs. On the “line” can also be located a special cutting plate, which cuts off excess cord.

We summarize what has been said about the main points of care in this maintenance of Hitachi brushcutters:

The principle of operation of the petrol trimmer

The design includes a motor and a hose, inside which there is a shaft (rigid or flexible type), which transfers rotation to the working part. The head and the cutting element. The handle controls the trimmer. And the straps allow you to place the brushcutter on your shoulder like a backpack. The protective cover allows you to work safely.

The engine runs on gasoline. Depending on the type, it is supplemented with oil mixed with fuel or in a separate container.

Gasoline trimmer for giving: types, device, principle of operation, rules of operation and maintenance

One of the main garden helpers in weed control is a brushcutter. She easily copes with mowing thickets in areas of different relief.

The gasoline trimmer is controlled quite simply, it is unpretentious in maintenance.

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For the correct choice that meets the requirements of operation, it is necessary to familiarize yourself with the types on the market, their structure and principle of operation.

Look at the overview and principles of the trimmers Operation Rules

A mixture of gasoline and two-stroke oil (proportions 1:50) is used as fuel;

Before mowing, stones, glass and other debris should be removed from the site;

It is prohibited to turn on the brushcutter without a protective shield;

To prevent overheating of the engine during operation, you need to take breaks;

It is necessary to operate the tool using special equipment (glasses, trousers made of hard fabric).


Than the specified proportions are added to the fuel mixture for the first oil starts. To increase the service life of the trimmer, it is recommended to fill the tank with only high-quality fuel: gasoline at least 92 brands, oil used for high-speed equipment.

The properties of fuel mixed from gasoline and oil are retained for 2 weeks, so there is no need to prepare a mixture in large volumes.

Professional tools are more expensive to purchase and repair than household models.

If you plan to frequently transport the brushcutter, then you should opt for household trimmers with a folding hose. It is not removable for professional models.

The type of grip will determine the degree of ease of use of the tool: bicycle type or D-shaped.

The curved hose will help to perform better mowing in hard-to-reach places: under benches, between flower beds and trees.

The professional trimmer is designed for longer work and larger volumes. Large dimensions, on the one hand, are not very convenient for transportation, on the other hand, due to this design, the risk of injury from flying objects is reduced.

Petrol trimmer device

The gasoline trimmer consists of the following elements:

The device and types of petrol trimmer

The trimmer is designed for cutting weeds, depending on the type, it can be used in the private sector and utilities.

The brushcutter design consists of the following elements:

Engine (two- or four-stroke gasoline);

One-piece or collapsible hose (straight or curved shape);

Control knobs (like a bicycle handlebar or D-shaped);

The head on which the fishing line is held;

Gasoline trimmers are of three types, the difference between which lies in the type of engine, power and type of cutting part.

Household brushcutters, as a rule, have compact dimensions, low-power engine. Many models are equipped with a collapsible hose, which makes it easier to transport the tool by road. The trimmer does its job well on areas up to 20 acres.

Semi-professional equipment is used for the beautification of large households with a vegetable garden and a garden. An ideal view of brushcutters, due to the combination of compactness and good power, sufficient for processing large areas.

Professional models are used in large or industrial farms for the treatment of courtyards, park areas, territory. The motors on such trimmers are powerful, the dimensions are quite voluminous, and a blade is used as a cutting element.

Do you need to fill the tank with fuel to the eyeballs?

Manufacturers do not recommend leaving fuel in the tank after mowing. Therefore, first it is worth assessing the scale of the work and diluting the oil with gasoline in the required amount. If the fuel is not used up, you can drain it until the next time. It is important to take into account that the mixture retains its properties for 2 weeks.

Gasoline trimmer: device, types, principle of operation

Various methods are used to control weeds, but one of the most effective is mowing the grass with a mower. Motorized devices are divided into gasoline and electric. Through comparative analysis, the benefits outweigh those of the petrol trimmers. This technique will be discussed in the article.

Popular questions How it works

Trimmer functions due to the presence of a motor that transmits rotational movements through the shaft to the working head. This allows the cutting head to rotate, which is set a few centimeters from the ground. The device is easy to operate thanks to the comfortable handle. The weight of the brushcutter is redirected to the torso of the person operating the equipment. The trimmer kit includes straps to hold the structure on the operator’s shoulders. An important point is the use of a protective cover that keeps flying debris and debris.

What types of trimmers can be repaired?

Household models most often develop their modest resource, after which they are written off. In some cases, it is possible to replace the head cover, which is subject to abrasion from constant rubbing with stones and debris.

Semi-professional and professional models can be repaired to extend the service life of the technician. However, when buying, you need to take into account that the repair of powerful equipment always costs an order of magnitude more expensive.