Top 3 Forester Trimmers Their Features And Troubleshooting

Top 3 Forester Trimmers Their Features And Troubleshooting

The trimmer, both electric and with an internal combustion engine (ICE), is an indispensable tool in the summer and autumn for owners of cottages and private houses. With its help weeds, small bushes are easily removed and the lawn is trimmed. But, like any technique, trimmers fail at the most inopportune moment. To fix the malfunction with your own hands, the user of this technique must first determine the cause of their occurrence.


The company Lesnik is a subsidiary of the Russian holding GardenTraiding. This organization has been supporting domestic manufacturers for more than a decade. The products of the company Lesnik are one of the youngest in the Russian market of garden tools and equipment. In addition to supporting the domestic market, GardenTraiding adapts the products of little-known foreign companies. Despite the fact that this brand is little known, many buyers prefer it in contrast to other domestic manufacturers.

Gardening equipment TM Forester is represented by electric and gasoline tools, including trimmers. Most petrol mowers of this brand are for domestic use. It is worth noting that many companies purchase Forestry equipment for the improvement of park areas, public places, etc.

Troubleshooting strategy

How to start troubleshooting if the trimmer does not start? In situations when the tool stalls immediately after start-up, it is worth inspecting the following units of the unit:

  • fuel tank;
  • spark plug;
  • fuel and air filter;
  • exhaust channel;
  • breather.

It is the breakdown of the above locations that most often leads to the fact that bad start trimmer. Let’s look at how to eliminate such troubles.

Gas trimmer device

The main unit of any gasoline tool is an internal combustion engine (ICE), which through various methods transmits torque to the actuator. In a modern brush cutter, a duralumin rod (pipe), inside which a drive shaft is located, is used as a transmission element between the motor and the trimmer head.

Thanks to a high-revving engine, the line speed can reach 13 thousand rpm, depending on the manufacturer of the scythe. In order to eliminate mechanical and temperature damage to the gearbox, a special hole is provided in its housing for introducing lubricant in the form of ointments. As a headset that facilitates for the owner during long-term operation, all models of motokos are equipped with a durable shoulder strap.

The range of gas trimmers and brush cutters

The lineup of Lesnik gas trimmers is represented by five models that differ in external (structural) and internal (technical) characteristics.

Trimmer Forester 254

This is a small model of a household class. A feature of the model is a curved bar, designed to perform work with greater safety and comfortable for the operator. A 2 mm thick fishing line acts as a cutting element. The mowing width is 38 cm. The model is designed for processing areas up to 900 sq. M.

Trimmer Forester 254

At the heart of the device is a two-stroke gasoline engine. Among the additional functions can be identified:

  • electronic ignition system;
  • vibration damping mechanism;
  • simplified air filter replacement system.

Trimmer Forester 304

Similar in functionality and technical characteristics to the previous model. Significant differences are:

  • the presence of a primer;
  • the ability to adjust the position of the handle, in this model it has a J-shape;
  • direct folding bar;
  • engine power 1.3 hp;
  • increased thickness of the fishing line (2.4 mm);
  • the possibility of using a blade knife;
  • possibility of replacing gear lubricant.

Trimmer Forester 304

The Forester 304 trimmer is one of the company’s most popular mowers.

Lawn Mower Forester 305

The market of garden tools offers customers a wide variety of budget models of various devices. The Forester 305 trimmer is a budget, easy model of a household class. The device is recommended for mowing grass and small bushes. Engine power is 960 watts, fuel tank capacity is 0.6 liters.

Lawn Mower Forester 305

It is best to work with the Forester trimmer on small and medium-sized personal plots. Due to the length of the rod, the width of the working surface was increased to 30 cm. The main feature of the model is the bicycle-type handle. In addition, the 305 is complemented by an emergency engine shutdown system.

Benzokosa Forester 334

powerful than previous models. Recommended for use in small and medium sized areas up to 1 thousand square meters. During operation, the Forester 334 is gaining speed up to 9 thousand revolutions per minute. Due to the ability to quickly disassemble the trimmer bar, it is easy to transport and store in rooms with limited space.

Benzokosa Forester 334

Among the additional functions: the presence of vibration isolation, the possibility of lubricating the gearbox, a simplified system for replacing air filters.

Lawn Mower Forester 335

Today, this model is very rare due to the fact that it was discontinued. A significant difference from the previous model is the type of handle. Buyers do not distinguish significant internal differences. It’s now almost impossible to buy a new Lesnik 335 petrol scythe.

Lawn Mower Forester 335

Motocosa cutting part

Regardless of the manufacturer, almost every model comes with fishing line and steel knives.

Trimmer Cutting Part

The cross section of the PVC fishing line for the trimmer can vary from 1.5 to 3.0 mm.

Made of durable polymer, it is subjected to intense wear and tear during mowing and, as a result, breakage. Therefore, from time to time it is necessary to check the presence of fishing line in the head and, if necessary, replace it. It is recommended that you purchase an additional bobbin to quickly replace it with a reel with a finished fishing line.

The main problems and malfunctions of the carburetor.

Strainer There are only two difficulties with this element:

In order to find out the cause of the breakdown, the fuel filter cover is unscrewed to remove the strainer. If it just accumulated dirt, then washing with gasoline or blowing will help.

With visible damage to the strainer, it is imperative to install a new one. There may also be damage on the fuel supply pipe (during repair, check this element).

The carburetor starting device almost always does not work due to blockages. Use acetone or the same gasoline for flushing.

Blowing off carburetor parts with a blockage of compressed air is an acceptable and comfortable repair practice.

The throttle body, the bundles of carburetor parts, the intake or exhaust pipe. all of these parts are subject to depressurization. Probably you can check with a simple method. spread the problem area with soap suds.

Why doesn’t the gas trimmer start

The reasons why the gas trimmer stopped turning on may be different, therefore, a phased diagnosis of the device is required.

Fuel tank (fuel quality)

Remember that always before starting the unit a check is required on the availability and quality of fuel. In this case, do not be greedy and save money, as well as “be smart” about the amount of added oil. Everything must be done according to the manual attached to the device, since when the piston group fails, its replacement will cost about 70% of the total cost of the trimmer. Fill fuel with the expectation that you will completely use it up when doing work. The gasoline remaining in the tank loses its properties after a while and can harm the engine. Therefore, do not prepare the mixture for future use and in large quantities. If the brushcutter does not start well, try to drain the “old” fuel from the tank and fill it with a freshly prepared mixture.

Important! Filling the device with fuel whose origin is unknown is fraught with negative consequences. Gasoline must be of high quality, purchased at a gas station, and its brand must not be lower than AI-95.

Candle and candle channel

So, you changed the fuel, but nothing has changed, and the trimmer still does not start. In this case, it is worth checking the candle channel: does it throw it with a combustible mixture. Often users put the choke in the “OFF” position at start-up, and when the engine starts, do not put it in the “ON” position, after which it stalls. Further, an attempt to re-start the ICE leads to the fact that gasoline fills the candle, and the start becomes impossible. To diagnose and resolve a possible problem in this node, do the following:

  1. It is necessary to unscrew the spark plug, wipe it well and dry it. When installing the spark plug in the engine cylinder, it should be dry.
  2. Drain the accumulated fuel from the combustion chamber. This is done through the hole from which you unscrewed the candle.
  3. If there is carbon deposits on the electrodes of the candle, it must be removed either with a thin file or a nail file.
  4. Do not forget to set the gap between its electrodes before replacing the part. The clearance on the candle should be 1 mm. As a probe to check the gap, you can use a coin.
  5. Next, assemble the unit, read the start instructions and try to start the engine again.

Video: Top 3 Forester Trimmers Their Features And Troubleshooting

If the engine does not start, then you will need to check the spark. For this:

  • unscrew the candle;
  • put a cap on the high-voltage wire on it;
  • touch the metal part of it to the cylinder body (to ensure contact, you can insert a pipe wrench) as shown in the figure below;
  • pull on the start cord so that a few revolutions of the engine occur.

Normally, at each stroke of the piston, a spark should slip between the electrode electrodes. If there is a spark, then the reason that the engine does not start should be sought in other nodes of the device.

For a better understanding of the process, how to test a candle for a spark, you can use this video, where the test is shown on the example of Soyuz petrol scythes.

If there is no spark, then first check the cable connecting the candle to the coil. perhaps the reason is in it. You can call it using the tester. If an open circuit is detected, a high-voltage wire will need to be replaced.

Also, the cause that the spark disappeared may be a malfunction of the ignition coil (magneto). The figure below shows what the coil (magneto) looks like from the Patriot petrol trimmer.

To eliminate the malfunction, you will need to use a tester to check the magneto trimmer, namely, its primary and secondary windings. On the primary winding, the resistance should be in the range of 0.4 to 2.0 ohms. If the device shows 0, it means that a short circuit has occurred in the winding, and if infinity is a clear sign of an open circuit. The resistance on the secondary winding should be in the range of 6 to 8 kOhm.

On some coils, it can reach 15 kOhm.

Air filter

In the event that your brushcutter does not start well or dies immediately after starting, you should pay attention to the air filter, as it may be clogged, as a result of which air does not enter the combustion chamber and ignition of the fuel does not occur. To check if the filter is in the case, remove it and try to start the engine. If he earned, then the reason is found. The filter needs to be replaced or rinsed well and dried before installation. In the event that you find oil in the air filter, it must be washed with gasoline, squeezed well and dried for at least 2 hours before installing in place.

If the unit still does not start when the air filter is removed, it is recommended to check the fuel filter.

Fuel filter

This filter cleans the fuel of possible contaminants. If it is clogged, then gasoline does not enter the cylinder, and, accordingly, the unit does not work or stalls after starting. The fuel filter is located at the end of the intake hose, which is located inside the fuel tank. To get to the filter, you need to remove the plug with the tubes coming out of it.

When removing the plug, the intake hose may disconnect and remain in the tank. It is removed with tweezers.

Next, remove the old fuel filter from the hose and put on it a new one, purchased in advance. You can also clean the fuel filter if you do not have a new one. The filter must be secured to the hose with a spring clip.

Install the intake pipe into the cork and insert the latter into the tank.

It should be noted that in some trimmer models the intake hose is not located on the cork, but inside the tank. You can remove it with tweezers or a hook bent from a wire.


Breather is a check valve, which is designed to equalize the pressure in the gas tank. If it is clogged and does not allow air to flow towards the tank, then a vacuum forms inside the fuel tank and the fuel stops entering the carburetor. To check the serviceability of the valve, remove the hose that goes from the tank to the carburetor. If gas does not flow from the tank, then the breather is clogged.

Users of trimmers often wonder: where is the breather? This valve is usually located in the gas tank cap and looks like the following figure.

Cleaning the breather is very simple: disassemble the valve and flush all its components. In some gas mowers, this valve can be located directly on the fuel tank. You won’t be able to find it right away, since it is hidden from view under the starter housing. Such a breather is cleaned with a regular needle.

Exhaust channel

The reason that the trimmer has significantly lost power, and when trying to increase the engine speed, it picks them up slowly, is often a clogging of the exhaust channel through which exhaust gases exit the combustion chamber.

It is necessary to remove the muffler so that no burner gets inside the cylinder. Next, clean the exhaust channel of carbon deposits.

This must be done very carefully, preventing carbon deposits from entering the combustion chamber.

After this procedure, the weak power of the unit and the slow set of rotation speed of the mowing head will no longer upset you.

Insufficient compression

If the compression is insufficient, then starting the engine, in most cases, will fail. To check the compression, you can use a car compressor.

  1. Unscrew the candle from the engine cylinder.
  2. Screw the compressometer into its place.
  3. Start yanking the starter cord the way you do when you start the brushcutter. Do this until the arrow on the measuring device stops moving in the direction of increase. This value will also show the compression force of this engine.

What compression should be? Normally, the compression should be at least 8 kg / cm2. Although even at 8 kg / cm2, some engines do not have idle and stall, since the fuel is not adequately pumped. If your mower does not pump higher than 8 kg / cm2, you will have to check the cylinder, piston and rings.

Also, poor compression can be due to a loosely screwed carburetor. Check if he is staggering. If so, tighten the fasteners that hold it in place. Also, if the carburetor is poorly bolted, you will notice that gasoline is dripping during operation.

Electric trimmer vibrates

Many users of mowers noticed that some time after the device started to work, it begins to vibrate violently. On some trimmers, mainly in more expensive models, an anti-vibration system is installed in the form of shock absorbers located between the engine and the bar. But in some cases even she does not save from strong vibration. The reason that a strong vibration appears in the trimmer may be a small amount or a complete lack of lubrication on a rigid or flexible shaft located inside the apparatus rod.

Replacing the grease on the hard shaft is as follows:

  • unscrew the gearbox located at the bottom of the bar;
  • after removing the gearbox, you will see the end of the shaft, for which you must pull to remove the part;
  • after removing the shaft, it is necessary to grease it with plenty of special lubricant “CV joint-4” or regular. “Litol-24”;
  • apply a small amount of grease to the shaft and evenly lubricate it along the entire length of the part, including the splines at the ends of the rod (if they work together, the shaft will have to be replaced);
  • After lubrication, reinsert the shaft into the rod and put the gearbox back in place.

Lubricate the flexible shaft as follows:

  • unscrew and remove the mowing head;
  • remove the rod from the electric motor by unscrewing a pair of bolts;
  • pull the flexible cable out of the bar;
  • grease the cable with the entire length.

This is done as follows: first you need to lubricate the end of the cable, and then insert it into the rod, after which, as it moves inside the pipe, lubricate the part and distribute it evenly on the surface. Then insert the shaft with the flexible shaft into the electric motor and secure it.

In case the grease did not help, and the vibration continues to appear, it will be necessary to change the flexible shaft.

Trimmer gasoline Forester 305

Knapsack brushcutter is equipped with a powerful two-stroke engine. The unit generates 8000 rpm at high load. For engine protection, a plastic casing is installed.

A well-thought-out brake system contributes to improved operation, and a special anti-vibration system significantly suppresses vibration, eliminating the transfer of unpleasant sensations to the operator’s hands.

  • Engine displacement: 25 cm3;
  • Shaft: split;
  • Engine power: 240 W;
  • Type of handle: bicycle;
  • Weight: 6 kg.

The package consists of a fishing line that helps cut small grass, and a knife that allows you to get rid of coarse weeds. Thanks to the shoulder strap, the load on the back is reduced.

The high build quality is pleasing, because the owners who have taken place have been enjoying the operational characteristics of the device for several years, and with the help of the instructions they easily figured out all the few management features.

how adjust carburetor on a brushcutter

Before adjusting, you must carefully clean the filters according to the maintenance in the annotation.

The upcoming do-it-yourself carburetor carburetor tuning is done by adjusting screws. There are three of them:

Right (L). adjustment of fuel consistency for low revs.

It is necessary to find the highest idle speed. To do this, slowly unscrew the screw (L) to the right and left.

To adjust, turn the screw a quarter turn without fail counterclockwise.

Bottom (T). is responsible for adjusting the engine at idle.

  • clockwise. increase;
  • counterclockwise. decrease.

For the correct adjustment of specific idling, typically:

  • steady work of the cool motor;
  • not overestimated speed of a hot engine;
  • for the trimmer head a large reserve of revolutions;
  • stable operation of the motor when changing position (sharp rise or lowering of the knife).

Left (N). adjustment of consistency at high speeds. (The screw is configured last).

The general adjustment of the highest revolutions, engine power, temperature and gas mileage depends on the left screw (H).

The carburetor trimmer with the last screw is configured as follows:

  1. Open the throttle to full, while giving out full throttle. Turn the screw clockwise until the rpm falls (in this case, they are oriented by ear).
  2. Turn the screw as slowly as possible counterclockwise until the motor runs unevenly.
  3. Then turn back completely a little, just hearing a measured, steady work.
  4. For a more pleasant implementation of abilities, it is more convenient to discern the work of an experienced user:

It is curious that, based on the beliefs of the creator video, the setting (its correctness) is determined by the color of the candle, and not just by the speed and stability of the motor.

Right carb setting do it yourself in this case, the combustion of the fuel consistency without residue, the color of the candle should be light brown.

Top models

It is extremely difficult to determine the most popular trimmers of this manufacturer. This is due to the fact that many products of the series were withdrawn from production or it was suspended. At the same time, there are trimmers that are in demand. Among gasolines, these are:

These are compact petrol scythes that do not require additional care, are easy to operate and maintain. Replacing failed parts is extremely simple.

These trimmers are the most economical and functional. These two products provide for the replacement of fishing line with a blade knife, which allows you to cut more durable grass. As for power, they are optimal when working on a suburban area.

Trimmer Petrol Forester 305

Doesn’t start on a cold trimmer. eliminate the cause

Trimmer does not start to the cold. Cause. air leaks that prevent fuel from pumping. To the camera

User manual

Before you start working with the device, you must familiarize yourself with the instruction manual. This document is attached to all products. The main provisions of the guide are:

  1. User Security
  2. Assembly and first start of the trimmer.
  3. Rules for conducting maintenance and its frequency.
  4. Features of working with the product.

Before you begin to work, you must make sure that all parts of the tool are intact and working properly. Next, the operator must wear protective clothing, glasses and headphones. this will make working with the Forester trimmer safe.

During operation, it is recommended to monitor the quality of mowing and the degree of heating of the engine. After completing the work, it is recommended to inspect the equipment and replace the failed parts (if necessary).

As an oil, the manufacturer recommends the use of oil for two-stroke engines. If you need to replace failed parts, contact your GardenTraiding Service Center. The list of service centers is indicated on the official website of the company.

The trimmer does not start after winter. WHAT TO DO.

Very often, a gas tool after a long break in work, does not start. There may be many reasons, but

If even in this case the trimmer does not start, it is worth evaluating the quality of the contact between the high-voltage wire and the candle. In the absence of a spark (in the presence of a reliable connection between these elements), most likely the problem is caused by a breakdown of the ignition unit. In this situation, you will have to turn to the services of masters who will reinstall the site.

Filter Check

Another common reason that does not start the trimmer is the clogging in the filter area. To confirm the guess, it is enough to dismantle the indicated unit and try to start the unit without it. If the trimmer engine starts, you will most likely have to replace the air filter or at least thoroughly purge the old one. In the presence of heavy pollution on a surface of the filtering element it is necessary to use a new grid. When resorting to such actions, one should not leave the suction pipe completely without a filter. Indeed, the rush in this case may lead to the need to repair the entire piston group of the engine unit.