Running In Brushcutters

How to properly start and run; 4-stroke engine What you need to know about running-in a 4-stroke engine with an air cooling system installed on garden, garden and park equipment

How to properly start and run in a 4-stroke engine Running in a 4-stroke engine

What you need to know about running in a 4-stroke engine with an air cooling system installed on garden, garden and park equipment

To begin with, be sure to read the operating instructions provided by the manufacturer of the equipment on which the engine is installed. Study it! Many buyers do not do this and significantly reduce the service life of their equipment.

Which gasoline should you use?

Based on the advice of specialists of service centers for the repair of gasoline 4-stroke engines, it is recommended to use gasoline with an octane number equal to 92. The use of gasoline with grades AI95 and AI98, due to the presence of additives in the composition, has a detrimental effect on the pistons and engine valves, leading to early wear and, accordingly, to breakage. It is recommended to use fresh gasoline, the shelf life of which has not exceeded 30-45 days.

Which oil to use and how much oil to fill?

Many gardening equipment buyers are of the opinion that the oil used in a car is perfect for equipment equipped with an air-cooled 4-stroke single-cylinder engine. This opinion is wrong. Automotive oil is designed to operate in a water-cooled engine and has a lower boiling point. Specialty oils designed for gardening equipment contain special additives and are focused on air-cooled engines. Most manufacturers recommend the use of oils SAE 30 API SF / CD.

A very important point is the buyer’s control over the oil level in the engine crankcase. It is necessary to pour oil into the crankcase so that when the engine is in a horizontal position, the oil level is on the last thread of the neck (Fig. 1). Check the oil level before each machine operation.

Please note that in each specific engine installed on the equipment, a different volume of oil can be filled. The required amount and type of oil, as a rule, is indicated in the operating instructions or on the engine itself, in the form of a reminder sticker. Basically, for engines from 4 to 7 HP, 0.6 HP is poured into the engine. Oils. We draw your attention if the new engine contains 500-550 ml before the first start. Oil is not a marriage! The reason for this is the engine, oiled by the manufacturer, for its further sale in other countries.

Engine starting

The first start of the engine is very important for its further operation. Please note that during the first or cold start of the engine, a large load on the piston system occurs! To avoid overloading, start the engine with the throttle (throttle) stick in the maximum position. As soon as the engine starts, move the throttle handle to 3/4 throttle position, or 1/2 throttle in warm weather. Procedure.

Open the fuel supply from the gas tank to the carburetor.

Move the choke position to the closed position.

The rope starter (traction cable), designed to start the engine, must be pumped 3-4 times until an obvious resistance of the cable appears. At this moment, gasoline is supplied to the carburetor.

Then, with a sharp jerk to the right of yourself, start.

After starting, depending on the temperature outside, after 1-3 minutes, we move the air damper handle to the open position.

The engine runs at idle speed.

Engine break-in

The running-in of an air-cooled 4-stroke engine is source of controversy among service specialists. Based on the data received from the specialists of authorized service centers, we found out that running in the engine only at idle is not acceptable. Depending on the manufacturer of the equipment, the instructions may recommend a combined run-in system.

So, after starting the engine (see starting the engine), let it warm up for 5-7 minutes. After warming up, you can go to work. The first 5-20 hours of the engine’s life (depending on the type of equipment, see the instructions) do not put a heavy load on it. Try to stick to 50-75% load.

In case of running-in a motor cultivator with installed cutters, do not try to deepen it to the full depth of the cutters.

An obligatory moment of operation will be compliance with the recommended time regimes, 25-30 minutes. Work, 15-20 rest / cooling.

After the first 5-20 hours of operation in a gentle mode, replace the oil in the crankcase with a new one. Your equipment is ready to go!

The four-stroke engine is widely used in gardening equipment (motor cultivators, motor pumps, brushcutters, snow blowers, lawn mowers), road construction equipment (generators, vibrating plates).

Running In Brushcutters

Running in a chainsaw and other Stihl tools

Stihl chainsaw running in

The days of the first chainsaws (Ural and Druzhba) in our country are over. Gone are the days when questions like How to run in a chainsaw. Stihl does not require running-in. Absolutely! No. Even if you are told to run it in uncles at the market where you buy it.

By the way, if you buy a Stihl tool on the market, this by 99.99999% means that you are buying not Stihl, but its Chinese replica. Firstly, this tool is sold only at official points of sale, through the manufacturer’s website and a few sites of certified partners. Secondly, not a single company manager will tell you what to do. Stihl chainsaw cold start and running-in. Why? Let’s take a closer look below.

How to run in stihl gas powered tools

The chainsaw left the conveyor and was delivered to the workshop, where it was assembled, filled with oil and a fuel mixture, checked, turned on and. Were fixed in a special running-in chamber of a gasoline-powered tool, which is located there, at the plant, next to the conveyor. During the specified time, it undergoes a hot run-in until the units and mechanisms are completely lapped to each other, in fact, this is the purpose of running-in and the best way, how to break in a Stihl chainsaw. Therefore, as soon as you acquire it, refuel and pour oil and go straight into battle! Work for 10-15 minutes, rest for 5 minutes, then 15-30 minutes, and rest again. After 3-5 tanks of gasoline, it will pick up maximum power, and it will be possible to work according to the registration certificate.

In addition, by the analogy just described, it is impossible run in nor brushcutter Stihl, nor roll in brush cutter Stihl, not even run in trimmer Stihl. Yes, other manufacturers may recommend such a run-in, but in this case, with Stihl, it will only be a waste of time and your resources (effort, fuel, oil).

If you want run in the Stihl tool (whether running in the Stihl petrol saw, running in the Stihl asphalt cutter or something else), we can only recommend you to run-in for grinding in parts that you changed after a planned replacement or as a result of repair. For example, in a lawn mower, such a replacement could be subject to:

  • Cutting nozzles;
  • Body;
  • Engine belt or wheel drive belt;
  • The shaft on which the knives are attached;
  • Motor.

How to run in a Stihl lawnmower in this case? Let it work sparingly for 30-60 minutes, get rid of especially tough stems of grass and debris, which usually leads to damage.

How to run in a Stihl blower

The blower is also called a garden vacuum cleaner. This is a very handy tool that in a matter of minutes can get rid of light debris and fallen leaves, after all, a garden plot (usually 30-50 sq.M.). Like other Stihl tools, it is factory run-in as required, so there is no need for additional run-in. Only in the first days of work, give him a reduced load, you cannot immediately let him into battle at 100%.

Running a chainsaw or brushcutters (petrol cutters)

Many of us today are employed in rural areas and it is such a tool as a chainsaw or a petrol cutter that is an integral part of everyday life. Having purchased a model of any of these tools you like, the question arises, what are the conditions to ensure that it will serve for a rather long time and please with its impeccable work and performance?

In particular, this article will focus on such a necessary procedure as running in a new engine. Almost every tool, be it a chainsaw or a brushcutter, is equipped with a gasoline two-stroke engine, which needs proper running-in during the first minutes of operation. Namely, the process of the so-called lapping of all moving parts and the saw head takes place. It will depend on the correctness of its implementation how well and for how long it will work.

Before starting to start the device, you need to study in great detail the user’s manual attached to the purchased tool and follow all the necessary recommendations that the manufacturer indicated in this manual. It is imperative that you check the presence of oil in the chain lubrication tank. If there is no lubricant there, at high speeds the tire and chain will fail very quickly. In the process of work, there is a sure way to check this, namely, when the chainsaw is running at high speeds, you need to direct the tire to a blank sheet of paper and in the case of a normally incoming lubricant on the sheet you will see a strip of oil.

The key to the flawless operation of your chainsaw and its long-term operation is precisely oil. The market now presents a huge variety of different oils that can be used for two-stroke engines at different price points. Typically, expensive lubricants are used for mopeds and motorcycles. The label on which this information is indicated will help you determine what the lubricant is intended for.

At the first stage of the operation, you need to prepare the fuel mixture, namely, mix the correct proportions of gasoline with oil, again, you can find this information in the instructions for your chainsaw. But, as a rule, it is 1:40, that is, for 1 liter of gasoline you should take 25 grams of oil. Also, it is recommended to take more oil when first filling the tool to ensure more thorough lubrication of all engine parts. It is very important to use only high-quality gasoline, which you buy at proven gas stations. Also, it should be noted that during operation, often due to a large amount of oil poured in than the manufacturer recommends, carbon deposits form on the candle, the saw smokes more and the muffler becomes dirty quickly, so we strongly do not recommend you to do this.

After you start the engine, it should be allowed time to idle, and then start to load the tool a little, adhering to safety rules. You should take a very responsible approach to this process and do not overload the engine in the first minutes of its operation, as it can fail quickly enough. Also important in this case is the running-in of the saw headset. In this case, it requires lubrication and good tension. In order for the chain to serve as long as possible, it is recommended to place it in oil for several hours so that all nodes and moving parts are saturated. The next step is to pull the chain onto the tire in such a state that it can be freely moved by hand and then rotate at idle for 3-5 minutes and then check the tension, but only after it has cooled down. After completing the engine break-in, you will need a carburetor control setting, which can be more accurately performed at a service center.

If you have a petrol brush at your disposal, then its first start requires first of all an inspection of the gearbox for a sufficient amount of lubrication and proper preparation of fuel. You should choose an oil that is recommended by the manufacturer of this tool, and if information is not available, then it is best to purchase a good two-stroke oil.

After you have started the engine, you should let it warm up at idle speed and at that moment you will need to adjust the air supply so that the spool or knife does not rotate. Then you should fully open the air supply and squeeze the trigger half for 20-30 seconds. Having released the gas, it is necessary to let the tool run for about 30-40 seconds. This sequence must be performed for 10-15 minutes and after that you can turn off the engine and give it a rest.

After the brushcutter has cooled down, you should start the engine with the air damper already open, without holding the gas for a long time, and also not allowing the engine to idle for a long time. In the next step, you should go to the gearbox running-in, which is performed when mowing young grass. In this case, you have to do the work of mowing with greasing for 5-10 minutes, and then take a break and repeat this procedure three to four times. As a rule, such stages are carried out until the fuel mixture is fully developed and after that your tool will be ready for continuous operation.

During operation, you should monitor the condition of the fuel filter and air filter and clean them promptly. If this is a chainsaw, then be sure to keep the chain always sharpened, this will put as little load on the engine as possible. By performing such simple steps, whether you have a chainsaw or a petrol cutter, you will greatly increase the service life, and you will ensure a good mood for many years to come.

Running in a walk-behind tractor and engine

Many owners of farms, summer cottages and rural land plots know that it is almost impossible to get a good harvest without high-quality soil processing. The use of a walk-behind tractor or a motor-cultivator facilitates such complex and routine land work as plowing, hilling, planting and harvesting potatoes, making hay and weeding grass. Gardening equipment will help not only to carry out land work, but also to cope with the tasks of maintaining the territory, transporting crops, removing snow in the winter.

We know that any equipment, including our walk-behind tractor, requires careful care and careful operation. For residents of Ukraine, a walk-behind tractor is an expensive purchase, so you cannot immediately start working with it at maximum power. This can entail not only the failure of individual units, but also significantly reduce the service life of the entire unit.

The very first and main process before starting the equipment into operation is the running-in of the engine and the walk-behind tractor itself. This will help to extend the life of the equipment, check the performance of the entire system and reduce the number of failures under high load. We recommend that you carefully read the operating instructions for your unit model beforehand. How to properly run the walk-behind tractor and the engine, read our article.

Diesel and gasoline engine break-in

Engine break-in is performed not only after purchasing new equipment, but also when installing a new motor, after overhauling, modernizing or replacing individual units of the walk-behind tractor (motor-cultivator).

Before starting the procedure, it is necessary to check the correctness and quality of the equipment assembly, the fastening of all connecting bolts, and the presence of the necessary lubricants. The further algorithm of actions is as follows:

  1. Pour the required amount of oil into the engine crankcase, check its level with a dipstick.
  2. Add the required amount of fuel to the fuel tank (A92 gasoline or diesel fuel, depending on the engine type).
  3. Check the connection of the oil level sensor to the relay.
  4. Open the fuel tank cock.
  5. Crank the recoil starter several times without switching on the ignition. On a diesel engine, the decompressor must be turned on.
  6. Open the choke valve of the gasoline carburetor.
  7. Start the engine and close the damper as it warms up.

After that, you can start running in the engine. At the first stage, it is recommended to start at low rpm, gradually and smoothly increasing them to values ​​slightly above average. In this case, it is necessary to work in all gears of the walk-behind tractor one by one, within 1-2 hours. This will make it possible to test not only the engine, but also the gearbox of the unit.

The second stage involves the performance of work on cultivation, plowing the soil and transportation of small loads (up to 200 kg). It is very important at this stage not to exceed the permissible load on the walk-behind tractor specified in the operating instructions. Example: if the maximum soil cultivation depth indicated in the passport is 30 cm, then when running in the engine, the immersion depth of the cutter should not exceed 15 cm.

Running in a diesel engine is not fundamentally different from a gasoline engine, but it is important to remember that any engine does not like long-term idling at high speeds. This is a very common mistake that leads to serious consequences, including overhaul of the motor. For various motoblocks, the running-in process can take up to 10 hours.

Starting the trimmer for the first time

When everything has been checked and the prepared fuel mixture is poured into the tank, the moment comes for the first start of the trimmer before running it in. To do this, you need to perform the following manipulations:

  1. Place the brushcutter on a flat horizontal surface;
  2. Move the choke control lever to the closed position;
  3. We pump fuel into the carburetor with several strokes of the primer;
  4. Turn on the ignition switch;
  5. Smoothly pull out the starting cord until you feel resistance;
  6. Then make 34 sharp jerks with the cord until the petrol cutter starts;
  7. After starting, open the air damper.

Inspection of the petrol cutter gearbox and its lubrication

The gearbox must be checked on a regular basis before starting the petrol trimmer. Lack of lubricant or a small amount of it increases the friction of the gear transmission of the reducer, which operates at rather high speeds. The result is overheating and gears. The brushcutter gearbox fails. To prevent the occurrence of such a breakdown during operation, regular inspection helps.

If it is detected, before starting the gasoline spit, an insufficient amount of lubricant in the gearbox or its absence, LITOL is put into the body. For this, it is necessary to unscrew the screw on the bend of the gear housing and sprinkle LITOL in the amount of 1-2 ml.

First start-up and running-in of petrol cutters

Correct first start-up and break-in of the brushcutter are very important steps in getting started with a new tool. On the one hand, they allow you to preserve the service life of a gasoline engine, laid down by the manufacturer, since at this stage, moving parts and parts are lapped. On the other hand, the first necessary skills of working with a trimmer are acquired when it comes to the first tool in life.

  • Preparing for the first start of the petrol cutter
  • Inspection of the petrol cutter gearbox and its lubrication
  • Preparing the correct fuel mixture
  • Starting the trimmer for the first time
  • We start running in petrol cutters

Preparing the correct fuel mixture

Before starting the running-in of a new petrol cutter engine, it is also necessary to properly prepare the fuel mixture. As is known for two-stroke engines, it is prepared from special two-stroke oil and gasoline, taken in certain ratios. You can find out the proportions from the instructions that came with the tool, or on the lubricant label. From the instructions, you will also learn the recommended type of fuel, as well as the recommended type of engine oil.

When going to run in a new petrol cutter, many are faced with a problem in preparing the fuel mixture. And the reason for this is the discrepancy in the instructions of the tool manufacturer and in the instructions of the engine oil manufacturer. The former recommend a 1:25 ratio. The latter recommend 1:50. Whom to believe? How to proceed?

According to experts, if manufacturers write a ratio of 1:25 or 1:30 in the instructions for the brushcutter, then most likely this is either a cheap tool with poor cooling, or the manufacturer does not know what kind of oil the consumer will add. But here you need to understand that an excess of lubricant does not in the best way affect the performance of the trimmer. Excess oil does not completely burn out when the engine is running. It cokes, clogs the cylinder and piston.

How to deal with this situation when running in a new tool? The ideal option would be to purchase exactly the oil recommended by the manufacturer of the gas cutters. In the case of run-in engines, when it is not possible to purchase the recommended oil, it is best to purchase a good Husqvarna two-stroke oil for the gasoline-powered tool of the same name. It is not cheap, but it lasts for a long time. It is necessary to stir it as written in the instructions on the bank.

Preparing for the first start of the petrol cutter

Before starting the petrol brush for the first time, it is necessary to perform a number of sequential actions:

  • Inspect the gearbox and lubricate it;
  • Prepare the correct fuel mixture.

We start running in petrol cutters

After starting, do not rush to immediately run in the trimmer. Allow 5 minutes to warm up the engine at idle speed. While warming up, adjust the air flow with the choke lever so that the spool with line or knife does not rotate. As soon as the tool has warmed up, open the air supply completely by moving the corresponding lever to the ON position and squeeze the throttle trigger 1/2 and hold it for 2030 seconds. Then we release the gas, let the trimmer work at XX 30.40 seconds. In this mode, we continue for 1015 minutes. Then we jam it and let it rest for 1520 minutes.

Having cooled the petrol cutter, we continue to run in the engine according to the previous scheme. Start on hot, the trimmer must be already with an open air damper. Try not to hold the gas for a long time, as the moving parts of the tool only rub against each other. And do not let the engine idle for long periods of time as it can overheat.

The next stage is running in the gasoline scythe gearbox. To do this, you must select an area with soft young grass. We mow for 510 minutes with podgazovkami at 1/22/3 of full throttle. After that we take a break for 2025 minutes. The cycle is repeated 34 times.

In general, the running-in of the petrol cutter according to the described algorithm is performed until the fuel mixture in the tank is completely depleted. Then the tool is ready for continuous work. During operation, monitor the temperature regime of the gearbox and motor. They should not overheat.