How To Install Knives On A Stihl Trimmer

Patriot brand trimmers are the most powerful hand tools for lawn care in gardens, cottages and household plots. Depending on the power source, Patriot trimmers are divided into gasoline and electric (battery), depending on the power and purpose. household and professional.

How To Install Knives On A Stihl Trimmer

Units and components of assemblies are assembled from durable and high-quality materials. All models are equipped with primers, anti-vibration systems and protection against accidental startup. The upper engine, light weight, good balance, ergonomic handle and shoulder straps provide a high level of comfort during work. The advantages include the low cost of tools of the entire model range.


Gasoline units are not environmentally friendly and require special preparation of a combustible mixture, but are more popular among homeowners, as They are more powerful and do not depend on the proximity of the network. For this reason, the range of lawn mowers includes several dozen modifications, differing mainly in power, engine size and fuel tank capacity.

PT 545

This model is equipped with a two-stroke engine with an increased engine life of 1.86 kW (2.5 hp) and a volume of 43 cm³, as well as a Champion RCJ6Y spark plug. The cutting element is represented by a trimmer head with 3 mm thick fishing line and a 3-blade knife. Such equipment is enough to handle large areas with a high level of neglect.

The advantages that simplify device management include:

  • the presence of an electronic ignition system;
  • transparent fuel tank, allowing the operator to control the amount of mixture during operation;
  • convenient adjustable U-shaped handle that facilitates the work of caring for large areas;
  • the presence of a fuel pump (primer) that pumps fuel and facilitates starting;
  • ergonomic control displayed on the handle (fuel supply button and gas lock);
  • shoulder strap with special soft inserts;
  • the ability to quickly replace the air filter without the use of tools.

PT 555

gas trimmer PT 555. the model is more powerful. Equipped with a 52 cm³ two-stroke engine, 2.21 kW (3 hp) and a 1.2 L fuel tank. The weight of the unit is 7.7 kg. Options include:

  • semi-automatic head with fishing line 2 mm thick;
  • 3 blade knife;
  • cutting disc;
  • tank for preparing the fuel mixture;
  • protective cover;
  • shoulder strap.

The device has several advantages:

  • a primer that simplifies starting the mechanism after prolonged shutdown;
  • easy to maintain air filter;
  • convenient U-shaped handle with control system displayed on it;
  • hard drive shaft, extending the service life of the unit.

Thanks to 3 options of the cutting device, the Patriot RT-555 model perfectly copes not only with grass, but also with weeds that have a hard stem and sparse bushes.

PT 3055

The PT 3055 model has the following specifications:

  • engine power. 1 kW;
  • volume. 25 cm³;
  • fuel tank capacity. 0.25 l.
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The cutting device is represented by a trimmer coil with a fishing line 2 mm thick and a 3-blade knife.

Unlike previous models, the Patriot Pt 3055 is equipped with a flexible shaft and collapsible bar, which facilitates the transportation and storage of the tool.

The remaining equipment is standard for the entire model range and includes:

  • a primer;
  • adjustable U-shaped handle;
  • protective cover;
  • shoulder strap;
  • electronic ignition;
  • system blocking from accidental start.

The model is recommended for the care of a site with dense grass vegetation.

PT 3355

This modification differs from the previous power (1.3 kW), engine capacity (33 cm³), fuel tank capacity (1 l) and the absence of a collapsible rod. All other equipment is standard. The advantages include lower weight. only 6.6 kg.

PT 3555

The Patriot PT 3555 petrol trimmer is positioned as a more reliable, productive and easy-to-use tool. Its two-stroke engine has a volume of 33 cm³ and a power of 1.32 kW. The tank capacity is 0.9 liters.

However, this unit differs from previous models by a number of advantages, including:

  • the presence of a quick start system;
  • metal forged shaft, extending the service life of the mechanism;
  • availability of anti-vibration system;
  • 4-blade knife that prevents the spread of parts and juice of poisonous plants (for example, cow parsnip or ragweed);
  • knapsack belt.

Video: How To Install Knives On A Stihl Trimmer

The trimmer design provides easy access to the air filter and spark plug. There is also a primer and an adjustable ergonomic handle.

PT 4355

This modification of the gas trimmer is recommended for mowing young dense growth on a personal plot. The power of a two-stroke engine is 1 kW, the volume is 43 cm³, the capacity of the fuel tank is 1.1 l. Grass can be cut using a trimmer coil with a 2.4 mm thick fishing line or a 3-blade metal knife (a special set of tools for installing it is included).

The model is equipped with a standard set of options, including:

  • electronic ignition system;
  • a primer;
  • accident protection system.

The modification is equipped with a rigid collapsible shaft and an adjustable ergonomic handle. 2 keys are included in the package: universal and six-sided.

PT 5555

The Patriot PT 5555ES Country petrol trimmer is the most powerful of all the above modifications and is suitable for mowing grass over large areas. Its power is 2.2 kW, and the engine displacement is 53 cm³.

The cutting system is adapted for combating poisonous weeds (equipment includes a 4-blade metal knife). Forged shaft has increased wear resistance. Anti-vibration system, adjustable handle and knapsack belt make work more comfortable. The primer and quick start system make it easy to get started. The package includes a set of fasteners and tools for mounting nodes.

T 545 Pro

The modification of the T 545 Pro trimmer with a non-separable barbell and low power (1.1 kW) belongs to the category of household and is intended for the care of small and not too neglected household plots. The cutting device is represented by a 2.4 mm thick fishing line and a metal knife.

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The model is equipped with an anti-vibration system, a primer and a rigid shaft. Ergonomic knapsack belt with pins on the springs and a soft shock absorber between the thigh and the bar makes the work more comfortable. Sophisticated design with easy access to the filter and spark plug for easy maintenance. The kit includes 2 hex wrenches and 1 universal.

Less popular petrol trimmers

The Patriot PT 2540 and the Patriot PT 415 are among the less popular household modifications. The first model provides the only method of cutting with a 2 mm thick fishing line and is the smallest of all the above: its power is 0.8 kW, the volume of a two-stroke engine is 23 cm³, and the declared weight is only 4.7 kg. At the same time, the mechanism is equipped with options that distinguish more powerful models: primer, anti-vibration systems and protection against accidental start, adjustable handle.

An additional convenience when working with a trimmer in hard-to-reach places (for example, under garden benches) is given by the curved shape of the bar, and its collapsible design makes it easy to store and transport the device.

The PT 415 trimmer is equipped with a four-stroke engine with a slightly larger power than the previous one (0.96 kW) and is great for combating thick grass in large areas with uneven terrain. To work with harsher vegetation, you can use a 3-blade metal knife, which is additionally included in the package.


The main advantages of electric trimmers are environmental friendliness and lower weight (due to the lack of a fuel tank). However, their attachment to the network and the cord reaching for the operator greatly limits the possibilities of using the mechanism. In addition, the cord lying on the lawn reduces the level of safety of the operation of the power tool.

The most popular models of Patriot brand trimmers are ET 1000 and ET 1200. Both have an engine top position that allows you to work with wet grass and are characterized by low noise level (96 dB) and vibration. The general characteristics include the presence of:

  • height-adjustable D-shaped handle that increases maneuverability during operation;
  • protective cover;
  • semi-automatic supply of fishing line;
  • collapsible bar, facilitating storage and transportation of the mechanism;
  • shoulder strap.

The first model is designed for domestic use and is adapted to work only with soft grass. The cutting element is represented by a 2 mm thick fishing line, a curved non-demountable rod allows you to reach hard-to-reach corners. The power of the unit is 1 kW, weight. 4.5 kg.

The second model has a little more power (1.1 kW) and weight (6.7 kg). The modification provides for 2 cutting devices: a trimmer reel with fishing line and a metal knife, which allows trimming of bushes. The model has options for easy start and gear lubricant change.

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Both models are easy to operate and maintain.


The Patriot TR 300 Li trimmer is a tool designed for final lawn processing (cutting grass blades around flower beds, flowers, landscape design elements) and having special tools for this:

  • telescopic rod;
  • bracket for plant protection.

For ease of maneuvering, there is an adjustable handle. The device runs on a battery with a capacity of 2.5 A ∙ h and a voltage of 18 V. The battery life is 25 minutes, fully charged. 30-40 minutes. The cutting element is a reel with fishing line 1.6 mm thick, the weight of the unit is only 1.6 kg.

Operation and repair

Despite the assurances of manufacturing companies that their trimmers are easy to maintain and repair at home, it is better to use the services of professionals. The simplicity of the device and the operation of the units is visibility. Trimmers consist of complex high-tech components and parts, the repair and adjustment of which require special knowledge.

At home, you can make simple manipulations, for example, adjust the height of the handle, replace the reel with fishing line or knives for the trimmer, clean or replace the air filter, etc. These types of work are described in detail in the instruction manual.

However, if the unit does not start, or there are abnormal sounds during operation in the engine or transmission, it is necessary to contact a specialized service. In order for the trimmer to last longer and without breakdowns, it should be taken at least 1 time per year to a service center for a professional inspection.

Ilya, 38 years old, Krasnodar: “Last year, there was a need to purchase lawn mowers to care for a small summer cottage. The price of the PT 555 gas trimmer (9,000 rubles) seemed reasonable, but was a little worried about the quality. However, a year later I can say that it is in vain: mowing without problems, starts well, works stably, cuts not only soft vegetation, but also bushes. ”

Mikhail, 42 years old, Moscow: “I purchased a trimmer for 8800 rubles (model Patriot T 545 Pro) to work on a 15-acre site and to care for its perimeter. Kosh is 2 seasons, and while there are no complaints: the power is high, the bar is long, the handle is easily adjusted with the screwdrivers included in the package. Particularly pleased with the adjusted angle of the gearbox: there is no need to bend to cut plants under the root. Excellent value for money and quality".