Changing the oil in the brushcutter

How to lubricate the gasoline grass trimmer with your own hands

How to dilute gasoline with oil for the grass trimmer?

Grass trimmer specifications contain references to recommended fuels and lubricants. in all this the octane number of the gasoline brand is specified, but when it comes to oils, there is a broad explanation of the need to use the product of a certain manufacturer. For the sake of reassurance it is pointed out that only when these tips are followed will the company extend the warranty. What is it: an advertising ploy or other manufacturers’ oils do not meet the requirements? The answer is in the true article.

Why mix grass trimmer oil with gasoline

The two-stroke engine has an ordinary and, at the same time, very effective design:

  • the piston makes a working stroke every second stroke;
  • the cylinder is lubricated by oil dissolved in gasoline;
  • The combustion products are removed by compression, without a special mechanism.

All this led to the creation of a family of small engines, successfully adapted in household and professional equipment:

Due to its construction it was only possible to achieve the desired fuel consumption on small engines with an output in the range of 15. 20 liters per gallon.forces. In particular, this figure looks great in the range of 1. 5 l.с. Engine oil change air filter maintenance gasoline grass trimmer. Here is a completely low weight and size of the motor corresponds to the consumption of gasoline.

As the size increases, the area of the inlet and outlet channels increases. The process of removing gases and feeding fuel is sharply exacerbated by. In this regard, the transition to a more efficient system of combustion of gasoline consistency, which would have the presence of forced maintenance of the motor. Four-stroke models thus won the palm of the highest horsepower trains. Combining them into multi-cylinder designs allowed the creation of special systems related to the formation of the composition of fuel consistency, lubrication and the rest, which had a favorable impact on gasoline consumption.

Changing oil according to regulations, or how an engine dies from routine maintenance.

Check the oil change intervals. They don’t need engine oil, maintenance is simple. change. What oil to use? How Often to Change? Dealer’s service manuals. Changing the oil in the oil? Gasoline grass trimmer engine oil-. In this video.

changing, brushcutter

lawnmower Maintenance

The rubbing elements of the piston and cylinder of a two-stroke engine are lubricated by oil in a certain proportion in the fuel. Gasoline burns and oil settles on the surface of the cylinder, reducing friction of the rubbing parts. Lack of lubricant can lead to cylinder damage and even seizure. If there is an overabundance, high temperatures cause the thermally modified product to deposit in the annular grooves. Compression goes down and with it, so does power.

How to mix oil with gasoline

Engine oils are used in grass trimmer gasoline. Mixing is done in a certain proportion. Manufacturers have different volume ratios: from 1 to 50 to 1 to 20. There is a reference to this in the technical specifications. Care must be taken with low percentages of oils. The mtd 2-stroke gasoline grass trimmer maintenance needs clean engine oil. A slight inaccuracy leads to oil starvation of the engine, reduces its life.

There are products that specify a proportion of 1 to 20-40. It is better to refrain from using such lubricants. Grass trimmer gasoline replacement cord in the trimmer recommended motor oil. 3. A wide range of the mixture indicates the low quality of the product. Piston ring lodging, with the constant use of such varieties, is practically guaranteed.

Motor oils, such as M-8, are added in the proportion of 1-20. In high-speed engines, their use is undesirable. The cycle between feeds of the mixture is so small that it will cause an overabundance of lubrication in the cylinder. Lawn trimmers have low revolutions, so they allow the use of low-grade grease. In view of the low initial resource, you can not worry about the encrustation of the rings. grass trimmer gasoline use and maintenance grass trimmer tact motor oil. before there is complete wear and tear on the equipment.

It is not important to use recommended oils or oils from other manufacturers. The main thing. to dilute petrol with oil for grass trimmer in proportions according to the characteristics of the product. It is not legal for service departments to refuse to provide warranty service simply because a different brand of oil has been used that meets the above-mentioned specifications.

How to Grease the Gearbox of a Patriot Grass Trimmer

  • mineral oils of high purity (inorganic);
  • solid lubricants with graphite or molybdenum disulfide.

Types of lubricating compositions

Greases of different consistencies are used to take care of the machine’s components:

READ How to Remove the Champion Grass Trimmer Head

Special gearbox compound belongs to the semi-liquid system.

Popular is the lubricant for the grass trimmer “STIHL”. Thanks to its special formulation and components, it greatly reduces wear and tear and increases resistance to corrosion. The main properties of this brand of grease are:

STIHL lubricant is suitable for brushcutters and trimmers and all transmissions with closed housing.


  • Strong (or fast) heating. Lack of lubricant is the root cause. If this fault is detected, grease should be added and the tool should be run in sparingly.
  • Increased vibration, wobbling of the gearbox. Mechanical damage is the underlying cause. Eliminated by tightening or replacing the housing.
  • Knocking, play or sticking when the shaft rotates. Causes of failure. bearing failure, damaged dust cover. To prevent such defects, you should lubricate the gearbox of your grass trimmer. How and how often you should lubricate. please read the manufacturer’s instructions.
  • Grass trimmer blades jamming under high loads. Cause. toothing wear. It is impossible to eliminate this defect. Require complete replacement of the mechanism.

Places to lubricate the grass trimmer

Careful inspection and maintenance are essential to the trouble-free operation and durability of the machine. Important for lubricating moving parts. In most cases such temperatures are:

The multipurpose water-resistant grease Lithol-24 is popular among the users. Working temperature ranges from.20°C to 60°C.40 to 120 degrees. This grease is used in friction nodes and is effective at high temperatures.

Properties of trimmer grease

Special substances are used in the production of grease, which must meet environmental regulations and standards. After production they decompose, without causing any harm to the environment.

The consistency of the material initially has a high level of viscosity, and during operation this parameter decreases. This factor ensures full penetration and reliable protection of the working steam under heat conditions.

READ How to Set the Ignition on a Husqvarna Trimmer Video

Timely and proper maintenance is essential for long life and trouble-free operation. Different materials are used for maintenance operations. Renowned manufacturers are developing their own branded care products. These include: lubricant for trimmers “Husqvarna”, “Champion”, “Makita” and others. The gearbox of the gasoline grass trimmer is lubricated every 8-10 working hours.

Users’ reviews of lubricants

Specialists advise to use only original materials with characteristics meeting requirements of the manufacturer. If there are none, it is necessary to specify, what to lubricate the gearbox of grass trimmer. It is not recommended by experienced users to use grease as it is not suitable for the temperature, speed and consistency of the unit. Also the given material has no anti-wear properties.

The working temperature range of solidol. from minus 40 to 65 degrees, but even at such parameters in the process of heating density of the material increases, and the grease itself becomes coarse. If there is an emergency need to treat the tool, you can use “Lithol-24”.

Maintenance of the gasoline trimmer for grass

Most brushcutters and trimmers have a flexible shaft. It should be checked at least once every 50 operating hours. To perform this operation, you need to remove the tip of the boom, pull out the shaft and inspect it, then lubricate.

For maintenance of the shaft will be suitable inexpensive materials, it is more difficult to find them for the grass trimmer gear. What to lubricate this mechanism with. depends on the tool manufacturer. How to lubricate the gearbox of a brushcutter learn what the following Husqvarna 128r grass trimmer will be about. It is best to use materials that contain molybdenum disulfide. The latter provides smoothing and filling cracks in the working surface, so it is especially valued among users.

Important: Using a lot of grease with high density leads to overheating of the mechanism, increased friction of the working pairs and fuel consumption. The lubricant selection and preventive maintenance should therefore be done responsibly.

How to use a trimmer correctly?

Take care of your safety first. To do this, get protective goggles, gloves, and, if necessary, headphones. Be sure to protect your feet. wear sturdy boots or boots, long pants. It is especially important when mowing with a metal disc. stones, debris and other foreign objects that can cause damage will fly out from under it.

Make sure all components and moving parts are securely fastened before you start working with your trimmer. Match your mowing head type to the job in hand. It may be a line for your trimmer, a disc or a saw. Check the oil level in the oil sump (for models with a 4-stroke engine) and the gear oil. Fill up with the correct fuel, start the machine and let it idle for about 3 minutes. It is also advisable to check the area to be mowed for foreign objects such as stones, glass, stumps, etc. д.

During mowing avoid bringing the grass trimmer head close to hard objects (curbs, building walls, trees). Also remember the counterclockwise rotation of the spray head, so the cuttings are on your left. Do not take quick, sharp strokes along the entire length of the tool. this overloads the machine and can cause damage. Make smooth reciprocating motions from side to side, advancing 30-40 centimeters with each step. Do not mow in rain, as most petrol unit manufacturers warn you in the owner’s manual. Do not mow with electric trimmers in very damp conditions.

Gasoline trimmer care must include routine cleaning and lubrication of cutting and rotating parts, replacement or cleaning of air filters, radiator cleaning. Before winter storage, drain the fuel and let the unit run for a few minutes (to exhaust all the gasoline in the fuel system). It is also recommended to pour some 2-stroke oil into the cylinder and manually (with a starter rope) turn the crankshaft. Also important is lubricating the brushcutter with a special rustproofing agent. Also take care of external and internal lubrication of the grass trimmer bar if it is disassembled.

What oil to use for the grass trimmer?

The oil for 2-stroke trimmer engines has to meet slightly different standards than the oil for 4-stroke engines. Lawnmower oil must have a high combustion rate in order to avoid the formation of soot on the inside of the fuel system (particles of soot can fall off and form scratches on the cylinder walls). Also the 2-stroke oil must be soluble in petrol and be able to withstand high temperatures.

With such serious standards in mind, modern gardening equipment manufacturers produce special lines of 2-stroke oils designed specifically for trimmers and brushcutters. Oils from manufacturers like Hado and STIHL are perfect for these machines, providing excellent lubrication and low flammability.

How and what to use to lubricate the brushcutter bar shafts

Many new brushcutters, even when sold as a complete set, do not have lubrication on the shaft. As a consequence, it gets hot, it wears out, to the sound of a running motor is gradually added a light whistling sound and vibration. To protect the machine from premature wear, you only need to give 10 minutes and simply lubricate the shaft.


First you need to disassemble the shaft. With a conventional chain saw it is enough to disconnect it from the upper and lower gear.

If the grasshopper has a collapsible, two-piece boom, it’s even easier. Only remove the connecting sleeve in the middle and pull the halves apart.

If the grasshopper has already been in operation, you may notice scuffs from the alignment bushings when you inspect the shaft, or shafts in the case of a collapsible boom. These are the places that need to be lubricated.

A small amount of grease should be squeezed onto a rag or fingers and work the shaft without skipping. It is applied in a thin layer, but everywhere. The splines need special attention, because they are under the most strain, especially when the blade of the grasshopper strikes rocks and other objects.

Slide the oiled shaft back into the tripod with a slight twisting motion. That way, some of the excess grease stays on the centering bushes where it is supposed to be. Rotation will also help the splines get into their seat on the gearboxes.

If you service a straight mower with a non-disassembled boom, simply reattach it to the gearboxes. In the case of a two-piece boom, the short shafts are each inserted into their own halves. After that the boom parts are centrally docked. If their splines don’t get it, you can simply twist the lower gear by hand. Then the docked boom is clamped back together with the socket.

If the mower is used infrequently, this maintenance should be done every season. The grease used for the CVTs withstands high temperatures well, which eliminates oil drips when the grasshopper is in use for long periods of time. The same compound can also be used to lubricate the gears. It can be pressed into them with a grease gun if the tube has no spout. Gearboxes have a higher frequency of lubrication than shafts. It is normally recommended by the manufacturer that you run it in every 5 hours.

Running in the engine of a brushcutter

A running-in period is recommended before you start work. The running-in phase is important for extending the service life of the gasoline engine, because the moving parts first have to get used to each other during the running-in phase.

Before the first 5 fuel tanks are used up, the fuel mix ratio should be 4% (1 part oil to 25 parts unleaded petrol, or 40 ccfm oil to 1 liter petrol).cc of oil per liter of gasoline), provided a high quality synthetic two-stroke engine oil is used; 2. Do not run the engine for extended periods of time at maximum rpm. Optimally. Maximum torque rpm; 3. Monitor the engine temperature, do not overheat and do not run the engine until it has cooled down; 4. After the run-in period change the oil. 5. Do not overload the engine (it must not run with the throttle fully open; during the break-in period, the maximum throttle opening must not exceed 2/3 of its travel).

At high oil content in fuel there will be a slight accumulation of unburned oil in the muffler. It is normal and when you change to a normal fuel mixture (2%) this residue quickly burns out.

Observance of these simple recommendations will allow you to run-in the engine in a sparing mode with increased lubrication of the piston group. The engine is the engine’s key to reliable and long life.

Service of your brushcutter (grass trimmer)

The engine. The air filter must always be clean (no dirt or shavings) and the foam filter needs to be wetted with oil. Check the fuel filter once a week and replace it if necessary, if the tool is used a lot. Check nuts and screws for tightness. before you start work. Clean the muffler (or muffler grid) and spark plug as necessary.

Cutting blades. Cutting edges must be well and correctly sharpened by following the prescribed templates and files (emery boards) and observe the cutting angles depending on the brand of the disc. Turn double-sided discs regularly by 180° and wear evenly. Dull or badly or improperly sharpened blade will not cut well and will overload the engine and shorten its life span faster.

Trimmer line and trimmer heads. Use only mowing line designed for the trimmer. do not use wire or metal ropes! Use only a trimmer line of the diameter recommended by the manufacturer. Wind the bobbin tightly but without crossing the coils. Mower head cleaned of dirt and greased if necessary. A worn or deformed head can cause damage to your brushcutter‘s gearbox and/or shaft.

changing, brushcutter

Angular gearbox. Clean off dirt as needed (such “fur” does not allow the Geareducer to cool normally) and add Husqvarna or similar grease for the Geareducer couple.

Protective guards. Never operate your brushcutter without the protective guard. It is a danger to life and limb and may overload the brushcutter engine. You should use a different kind of deflector for each cutting attachment than specified by the manufacturer.

How to Lubricate a Trimmer Gearbox the Easy Way

How to properly lubricate the gearbox of a brushcutter? Many trimmer users do not attach much importance to overheating of the mowing head gearbox. And, of course, in case of a breakdown they immediately run to a repair shop. To save time and money on repair, it is enough to lubricate the gearbox before the season and forget about extra costs.Gearbox. The gearbox of a grass trimmer or brushcutter is one of the most loaded parts in this device and quite often breaks down. That’s why it definitely needs periodic maintenance.

It will need

Take a syringe and temporarily remove the piston. Put grease in the cylinder. The correct amount is normally 5-10 grams (for more exact info please see your brushcutter‘s Instruction Manual).

It’s a good idea to take a few minutes after buying your brushcutter and before mowing season to lubricate this important assembly. And your tool will always be ready to work at any time and will serve you for a long, long time.

First start-up and running-in of the lawnmower

Proper first start up and running-in of the mower is a very important step when starting a new machine. On the one hand they allow you to save the service life of the gasoline engine, laid down by the manufacturer, as at this stage there is a lapping of moving parts and nodes. On the other hand, you get the first good trimmer experience with a first-time trimmer.

Inspection of lawnmower gearbox and its lubrication

Inspection of the gearbox before starting the gasoline grass trimmer should be performed on a regular basis. Lack of lubricant or a small amount of it increases friction in the gear reducer working at quite high RPM. As a result, the gears and gears overheat. The gearbox of a brushcutter fails. To prevent the occurrence of such a failure during operation and helps regular inspection.

If you find, before starting the gasoline grasshopper, insufficient or no grease in the gearbox, put “LITOL” in the housing. To do this, unscrew the screw on the bend of the gear housing and apply LITOL in an amount of 1-2 ml.

Working with gasoline trimmer for a long time, every 8-10 hours add grease to the boom gearbox.

How to lubricate the gearbox of grass trimmer or brushcutter: proper care for garden tools | (Photo Video)

Many trimmer users do not pay much attention to maintenance of their tools. Particularly at the gearbox end of a brushcutter. Gearbox work involves heat.

Continuous use of brushcutters causes the gearbox to overheat regularly, leading to gearbox failures. Gearbox failure makes the tool unusable and must be repaired.

Geared motors are expensive to repair, so you should avoid reducing the tool to this condition. The main reason for gearbox overheating and malfunctions is the lack of lubrication.

This article explains how to correctly lubricate the gearbox of a grass trimmer in order to avoid damage.

Tools and materials needed

The following tools and materials will be needed for maintenance of the gearbox:

Allen wrench for opening the lubrication hole in the gearbox

This kind of wrench is usually supplied with your brushcutter or trimmer.

The next tool is a 10 ml syringe. This is how to get the lubricant into the gearbox.

We recommend that you use lubricant supplied by the brushcutter manufacturer. As a last resort, you can use any rotary gear lubricant, such as Lithol 24.

Action Open the gearbox

To gain access to the gearbox, the gearbox must be opened. It’s easy enough to do. use the hexagon socket wrench to unscrew the gear bolt. The bolt on all brushcutters is in the same place, near the tool.

Action Filling the syringe with oil

The diameter of the tube with grease does not match the diameter of the gearbox

To inject oil into the reducer without any problem, you need a syringe.

Then fill the syringe with grease from the tube.

The piston is then inserted back into the syringe. Syringe is ready to add grease to the Geareducer.

Action Filling the gearbox with grease

Syringe is reinserted into the gear unit bore

First you insert the grease gun into the hole in the gearbox.

Squeeze a little grease into the gearbox and turn it about a quarter turn

Then squeeze a little grease into the gearbox and turn it about a quarter turn.

Once all grease has been squeezed out, the process is complete

Fill in small portions of grease. After each grease supply, rotate the gearbox 1/3 to 1/4 turn. It is desirable to choose the amount of grease at each filling so that the gearbox makes a full revolution during the greasing process.

Action Sealing the gearbox

After the reducer is filled with grease, tighten the bolt on the reducer and clamp it well.

How to lubricate the gearbox of a brushcutter (easiest way)

How to lubricate the gearbox of grass trimmer or brushcutter: proper maintenance of garden tools | (Photo Video)

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Other common breakdowns

Besides the above mentioned failures other breakdowns can occur, for example, the trigger can jam or the limiter of the mowing head can fall off. You can replace the trigger with a blowtorch and the limiter can be rewired with copper wire. You notice that the line to the trimmer is torn or out of order? Simply buy a new roll of line of the same diameter and wind it on the bobbin after taking apart the drum.

If you want your mower to work long and smoothly, it needs continuous service, you can call a service center or make a diagnosis yourself.

This requires you to constantly check the rod bushings and change them as needed, the same goes for the candle.

changing, brushcutter

In the gearbox it is constantly necessary to score a special lubricant, partially disassemble the motor part and clean from accumulated dirt. In most cases, such a service trimmer for grass is carried out, according to a certain number of hours worked.

Now you’re a little familiar with how to repair gasoline trimmers without extra help. But it is worth noting that if you are not confident in your knowledge and skills, it is better to leave this matter to professionals.

Maintenance of lawnmower cutting units

The saw headset blunts or wears out after a while. Work with the equipment becomes tense, the load increases, the quality of mowing is aggravated. Iron saw blades are sharpened, plastic ones are replaced.

If the cutting equipment is a line for the trimmer, it wears out evenly, and a new material is installed in the spool. The mechanism of operation of the cutter with a fishing line is concluded in the gradual unwinding of the spool under the action of centrifugal force. In contact with grass, the line for the trimmer is frayed, from the spool is fed evenly. A special winding is needed if you set a goal of two cutting elements coming out at once not tangled with each other.

The illustration shows how to correctly wind the line for the trimmer on the mower spool. Before winding the new line for the trimmer need:

  • Having unscrewed the nozzle, carefully remove the cover, holding the spring with your hand;
  • Remove scraps of old line from the spool;
  • Measure 5 meters of new string and fold it in half;
  • in the spool the guides under 3.5 ends, hook the middle part behind the notch and wind it in the direction of the arrows for each half of the string;
  • lead the remaining 20 cm through the special notches at the opposite ends of the spool;
  • install the spring and washers, lead the ends of the line outwards, close the drum with the lid.

For a better opportunity to learn how to change the line for the trimmer on the benzocosa, watch the video.

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changing, brushcutter

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