How To Assemble A Petrol Trimmer

Gasoline trimmer for summer cottages, which one is better to choose Gasoline trimmer, which one is best for your summer cottage? Features, advantages, main differences from a lawn mower and an electric trimmer.

Additional accessories

Before choosing a lawn trimmer, explore all the features of each model, some of them are endowed with additional useful functions. This can be a snow plow attachment, an anti-vibration system for hand comfort, a quick start of the trimmer with a decompression device, which increases the life of the tool.


Used for mowing weeds and grass in house plots. It is a lightweight tool with a curved handle and a power of 1 horsepower or slightly more. Such trimmers are suitable for small amounts of work or infrequent mowing, haircuts.

When purchasing a household tool, you need to know how to use a grass trimmer, he needs a rest every 20-25 minutes of work, otherwise it may fail. But at the same time, the household trimmer has moderate gas mileage and excellent maneuverability.

Gasoline trimmer: the purpose of the tool in the country

A lawn trimmer is, in fact, a gas-powered grass scythe. It is used for mowing ornamental grass (leveling, cutting), for mowing weeds, for mowing grass for hay.

The trimmer does this quickly and neatly, in addition, it is light and easy to maintain and does not require a lot of storage space, which is the main difference between a trimmer and a lawn mower.

With a trimmer, you can not only cut grass and herbaceous plants, it perfectly cuts off not thick (2.5-3 cm in diameter) branches of trees and shrubs so that it will replace the pruning shears in the garden.

Trimmer knife and line

The line included with the trimmer is used only for cutting grass. Several types of fishing line are distinguished by the type of pattern:

  • In the shape of an asterisk. For green decorative lawns or young grass;
  • In the shape of a square. For tall grass with thick stems;
  • In the shape of a circle. A versatile look, suitable for both lawn and woody and dry grass stems and leaves.

For cutting branches, cutting shrubs, you will need a knife. There are models equipped with only a fishing line, and there are models with both a fishing line and knives.

How to choose a gasoline trimmer for a summer residence, selection criteria

Before choosing a petrol trimmer, you need to know at least briefly the basic parameters of the tool. The key when choosing a gasoline trimmer will be how often you plan to use it and what areas it is intended for.

Based on this, the best gasoline trimmer for your specific area is selected according to the power and performance of each individual model.

Petrol trimmer handle weight and type

According to the type of bar (handle), trimmers come with a curved handle for light loads or a straight handle for larger loads. The weight of the trimmer, as a rule, does not affect the operation of the tool, it matters for the person working with it, if it is a man, then you can take a heavier model, if a woman, then it is easier.

When choosing a tool by weight, you need to take into account the size of the trimmer gas tank, the larger it is, the heavier the fully filled trimmer will be (on average by 0.6-1.5 kg).

Gasoline trimmer brush cutter Energomash BT-8943S

Benzotrimmer BT-8943S. New model of petrol cutters Energomash for the care of the backyard territory. The spit is equipped 2-stroke gasoline engine volume 42.7 cc cm and power 3000 watts. The tool is designed to work with a three-blade cutting knife (for mowing hard grass and weeds) and a semi-automatic reel with a line diameter from 2.0 to 2.5 mm. The torque from the engine to the cutting equipment is transmitted through a one-piece straight shaft. Starting the petrol cutter is not difficult, since the tool has a system easy start. For easy and simple cold start, installed manual fuel priming pump (primer).


  • Easy start;
  • Metal ratchet;
  • Fuel pump for easier starting;
  • Semi-automatic switch for easy starting;
  • Straight shaft. Energomash does not use a cable system for transmitting torque from the engine to the gearbox. Instead of a cheaper and unreliable system where rotation occurs due to a cable, the manufacturer has installed a strong inflexible shaft to eliminate transmission breakage at the attachment points of the gearbox and motor coupling.
  • Guarantee: 24 months;
  • Gasoline trimmer brush cutter Energomash;
  • Three-bladed knife. 1 PC;
  • Protective cover with screws. 1comp.;
  • Socket wrench screwdriver. 1 PC;
  • Screed. 1 PC;
  • Fuel mixture canister. 1 PC;
  • Line cutting knife. 1 PC;
  • Hex wrench. 2 pcs;
  • Double ended wrench. 1 PC;
  • Side handle. 1 PC;
  • Double-ended screwdriver. 1 PC;
  • Spool with nylon line. 1 PC;
  • User’s manual;
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The main
Power 3000 W (4 HP)
Engine speed 8300 rpm
Line diameter 2.0. 2.5 mm
Cutting element Line / knife
engine’s type 2-stroke petrol
Mowing width 44 cm
Engine capacity 42.7 cc
Primer there is
Rod type Straight
Fuel tank volume 1200 ml
Trimmer head type Semi-automatic
Locking the start key there is
Packaging Cardboard box
Net weight, kg 7.1 kg (excluding cutting attachments and fuel mixture)
Equipment Petrol trimmer brush cutter, three-blade knife. (1 PC); protective cover with screws. (1 comp.); socket wrench screwdriver. (1 PC); screed. (1 PC); canister for the fuel mixture. (1 PC); knife for cutting the line. (1 PC); hex wrench. (2 pcs); double-sided wrench. (1 PC); side handle. (1 PC); double-sided screwdriver. (1 PC); reel with nylon line. (1 PC); user’s manual;
Warranty, month 24

Rating: Bad good

Enter the code shown in the picture:

How to choose a petrol trimmer

The huge range of gas-powered lawn mowers on the market today makes the task of choosing a tool quite difficult. Below are some explanations and recommendations that will help you understand the nuances and purchase a unit that will not disappoint you and will cope with all the goals set for it.

Key parameters of the gasoline trimmer

  • When deciding how to choose a gasoline trimmer, you need to keep in mind that the following parameters will help you assess the suitability of a particular tool:
  • Engine power;
  • Tank capacity;
  • Type of cutting mechanism;
  • Handle shape;
  • Cutting width.

1. Power
Engine power is directly related to fuel consumption. Among modern models are units with a lightweight engine, simple and reinforced. At the same time, models with a two-stroke engine are significantly cheaper than four-stroke analogues. Nevertheless, the four-stroke engine is much more convenient in operation.

2. Tank capacity
The amount of time you can mow without refueling depends on the volume of the tank. It should be borne in mind that the higher the tank capacity, the heavier the mower is.

3. Type of cutting mechanism
The cutting mechanism can be nylon line or metal blades. While the simpler and safer solution, the line is less durable (requires regular replacement) and is not very effective at cutting wild thickets and tree branches.

4. Handle type
The trimmer handle can be made in the form of a ring or in the form of a bicycle handlebar. The ring-shaped handle is typical for budget models. In such devices, the function buttons are located on the shaft, which makes them not very convenient to use. In turn, in professional designs, the control panel is literally at hand.

5. Mowing width
As for the mowing width, you should strive for the maximum of this parameter, since it determines the performance of operations.

Types of petrol trimmer and their scope

All modern gasoline trimmers can be divided into several basic types:

  • Household;
  • Professional;
  • Universal.

For occasional mowing of grass in the garden, an inexpensive, low-power lawnmower with a two-stroke engine is quite suitable. These models are usually compact and lightweight. They are quite maneuverable and comfortable, but only for short-term operations. Without stopping, the unit can be used for no more than half an hour, after which the unit needs at least 10 minutes of rest. In addition, the significant disadvantages of household samples include increased noise, weak working mechanism and the absence of a vibration system.

How To Assemble A Petrol Trimmer

Professional devices equipped with a reinforced motor, additional protection of the working part and a screw knife instead of fishing line are devoid of these disadvantages, which allows them to cut not only grass, but also thick weeds and shrub branches without problems. At the same time, such a unit has a high level of fuel consumption, impressive cost and rather expensive repairs.

Universal models are a practical intermediate solution in terms of price and quality. As a rule, they are chosen for domestic purposes for fast and efficient processing of large areas.

A separate line among the petrol trimmers are brushcutters, designed for the most difficult tasks and capable of cutting even thick bushes and young trees.

Using a special lubricant

For placing lubricant in the gearbox a cavity is provided, which is opened with a screw plug, and a portion of the lubricant is placed in the opened hole. It should be said about the composition of the trimmer lubricant, which consists of components that decompose after use and do not bring harmful substances into the surrounding space.

The lubricant is changed after 5055 hours of operation of the unit, this data can be found in more detail in the technical documents for the trimmer. The shaft of the unit is constantly in need of lubrication. Before starting work, after buying a new mower, be sure to thoroughly lubricate the shaft if it has not been processed from the factory.

Manufacturers make sure that users of their products save on the purchase of lubricants for various parts of the mechanism and have developed a universal option that provides for interchangeability during maintenance work.

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Preventive maintenance of the unit

Any device will serve much longer if you take care of it in a timely manner and prevent the creation of emergency situations. For example, regularly clean work planes and the area of ‚Äč‚Äčopen parts of the device from dirt. For prevention purposes, it is allowed to cover open cavities when working in dew, dusty bushes or large thickets. This prophylaxis is recommended for a very short time to prevent overheating of the engine due to poor ventilation.

Timely replacement of filters in an internal combustion engine is important. In modern models, there are special types of filters that prevent contamination of the fuel system. Inexperienced users are not aware of the need to replace filters until problems arise with the operation of the piston system. Replacing the filters in due time will save a lot of money from the pocket of the summer resident or the owner of a private house.

Be sure to clean the ventilation openings from trapped plant parts and dust, purge channels. Do not use metal objects, especially sharp objects, to remove layers. Scratches on the inner surface will result in dirt build-up. The outer parts of the case are also cleaned from the spray layer.

How to choose a trimmer by engine type?

Lawn mowers on the market today are offered in two engine types:

  • Two-stroke;
  • Four-stroke.

Four-stroke engines

If we talk about experienced gardeners, then they prefer this particular type of engine. The technical systems and components in such units are much more complicated and they are always repaired in workshops, but these trimmers are distinguished by greater power and the ability to work for a long time at low speeds. Such technical characteristics allow mowing not only thin grass, but also old thick grass stems and even some young growth of trees.

It is convenient to use the trimmer for all household people who want to keep the lawns in the courtyard and adjacent areas tidy and trimmed. When buying, the question arises of how to choose the right motorized mower so that the price matches the quality and does not have to overpay for the extra engine power.

It is possible to use petrol trimmer in wet and rainy weather, and in accordance with safety requirements, electrical appliances cannot be used in wet conditions. Reviews suggest that gasoline engines differ from electric models with increased power, and make it possible for long-term operation without interruptions.

The only advantage of electric mowers is their price, simple low-power models cost two times less than similar petrol trimmers. To ensure order on the lawn in a private house, you should choose gasoline-powered units of low weight and low power. They are equipped with one cutting tool, only for mowing the grass and its occasional mowing.

Two-stroke engines

Units of gasoline mowers with this type of engine are usually have a small price. We will not talk about the fundamental difference between the engines of the two types from each other in terms of operation, we will only note the difference in maintenance and operation.

The advantage of trimmers on a two-stroke engine is their low price, they cost about 4 thousand rubles. Engines are unpretentious in relation to the quality of gasoline and have a simple mechanism. This is very important, as it allows inexperienced owners to fix minor problems on the spot and not go to the workshop for various trifles. The owners of household plots consider the power of such units to be quite sufficient for work in the daily economy.

The disadvantage in the operation of a two-stroke engine is that it is necessary to constantly measure the required amount of oil for mixing when refueling gasoline. If this procedure is neglected, then problems in the operation of the piston system will be traced.

You should pay attention to the mower bar that you purchase. Most often, telescopic and curved booms do not work well and deteriorate. In this regard, it is better to buy mowers with straight bars, which are more durable in operation.

It is irrational to buy a powerful model for preventive grass cutting near the house, in addition, it should be remembered that each mower is in the hands for a certain period of time and has weight. This suggests that it is necessary to purchase units of low weight and such power, which is necessary in each specific case.

Worst failure scenario

There are times when the starter is still operational, but a worn out cord can break, for example. The ratchet has not yet had time to work when the engine is started, and the remnants of the cord are immediately wound on the coil, the return spring loses its hooks, the grooves in the starter housing break. The result is the replacement of both the springs and the housing.

How tight is the spring cocking?

It is possible to give the spring the necessary potential force required for a clear and fast winding of the cord by determining the length of the cord in turns. To prevent the cord handle from drooping, add 1-2 more turns to the number of turns. So, if the cord has a length of 5 turns of the coil, then, when charging the spring, turn the coil 6-7 full turns.

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Starters for petrol cutters: device and installation features

  1. How does the starter for petrol cutters or trimmers work?
  2. Worst failure scenario
  3. How do I replace or replace the starter spring?
  4. How tight is the spring cocking?
  5. Assembling a brushcutter starter
  6. How to assemble a new mower starter?
  7. How do I change the starter cord?

The recoil starter for a petrol cutter or petrol trimmer is a mechanical unit that includes a pulley fitted to a ratchet. A rope is wound on the pulley in the initial position. At the start, it is pulled outward. The pulley is spring loaded as soon as you let go of the end of the rope, as it reels back. A flat strip rolled into a ring is used as a spring. It resembles a spring in a large mechanical watch that is wound once a day. The starter itself is located more often at the rear than closer to the front end of the mower or trimmer. In order to correctly perform all the manipulations with the petrol cutter starter, you need to know the features of the device and installation.

How do I replace or replace the starter spring?

If everything is in order with the rope on the starter, suspicion falls on the reel itself. It is activated by a ribbon spring, coiled into a roll. Certain steps must be taken to change the spring.

  1. Remove the starter from the brushcutter.
  2. Remove the starter coil.
  3. Unscrew the main bolt holding the pulley to the housing.
  4. Pull out the gripping tendrils and spring, the ribbon spring is almost fully extended or coiled into larger rings.
  5. Hold it in advance.
  6. Check if the spring is intact (there may be rusty streaks, cracks, etc.). If the hooks at its ends are broken, bending new ones will fail. High carbon steel breaks when you try to bend it. Loose hooks are suitable for slight bending.
  7. Make sure the auxiliary (regular) spring and washers are in place. These parts protect the coil body from being punctured by the ends of the main spring. If the washers and the spring are broken, and new ones are not available, do not tighten the coil bolt tightly, but watch it, it can unscrew and get lost.
  8. If the main (flat) spring is damaged, insert the same new one. Place the hook on the end of the spring in place and bend it, inserting coil by coil into the space it should be.

The rewinding of the spring takes a minute. Dexterity in this action is acquired quickly.

How to replace or replace the starter spring, see the following.

How does the starter for petrol cutters or trimmers work?

The starter mechanism is generally a single and universal mechanism for petrol cutters, trimmers, gasoline and diesel generator sets. It is not a problem to equip them even with a car, motorcycle or scooter, if your vehicle has free space for its installation. It was not for nothing that many Soviet cars and trucks were equipped with a starter tool that remotely resembles a crowbar bent twice.

The starter assembly has the following parts:

  • Hook ignition spring;
  • Cord wound on a reel;
  • Return spring;
  • Ratchet drive and main spring;
  • Mechanism housing protecting the ratchet;
  • Locking bolt.

Assembling a brushcutter starter

When servicing and repairing the starter, it is important to properly assemble it as if the assembly was carried out by the manufacturer. Any part that is incorrectly installed will prevent you from fully using the trimmer or brushcutter.

  1. After winding the spring, turn the coil over and position it so that the second spring hook falls back into place. To control the correct installation of the spring, there are technological windows on the coil itself.
  2. Install the starter pulley and make sure one of the spring hooks fits into the groove located on the starter cover.
  3. Insert the spring and washers on the sides to prevent the spring from rubbing off the plastic compartment in which it is located. If the spring is broken, and the other is not the same, an additional washer is placed in its place.
  4. Insert the antennae cup into the grooves on the spool.
  5. Install the coil in its place, tighten the bolt as far as it will go, but without fanaticism.

If you do not protect the compartment from the main spring with washers, where it moves when winding and unwinding the starter cord, the coil often sticks when you try to start the petrol trimmer or brushcutter. Loosening the coil bolt will result in its loss.