How To Adjust A Carburetor To A Husqvarna 128r Trimmer

The first question that should be answered in the title topic review. Why is it necessary to adjust the carburetor of the 128th braid? It’s all about the European fuel standards. The 128R lawn mowers are tuned to EU fuel standards. We have lower quality fuel (we are discussing AI-92 gasoline), which makes this adjustment necessary.

How To Adjust A Carburetor To A Husqvarna 128r Trimmer

The procedure for adjusting the Husqvarna 128R carburetor is not complicated.What you need for its production is a rev counter tachometer, adjusting screwdrivers.

1. We set the departure of fishing line from the trimmer head 15 cm long on each side (this significantly affects the speed).

2. We dilute AI-92 gasoline with Husqvarna engine oil for two-stroke engines in a ratio of 1:50 (one part of oil to 50 parts of gasoline). For ease of calculation, we recommend a ratio of 1 liter of fuel x 20 milliliters of oil. For the first start of the braid, we recommend a ratio of 1 liter of fuel x 23 milliliters of oil (ratio for engine break-in). Exact observance of these ratios and the use of only Husqvarna oil for two-stroke engines is the key to long-term operation of the engine and the supplier’s warranty in the event of a warranty case.

3. We start the scythe and bring it to the maximum with the throttle stick

Revolutions. With the right adjusting screw N we adjust the revolutions to the level of 8500. 8800 according to the tachometer.

4. Release the throttle stick. At idle speed on top of the carburetor with the adjusting screw T, we bring idle speed to the level of 3000. 3200 by tachometer. In this case, the motor should work smoothly, without jerking. The trimmer head should stop rotating.

5. In case of visible smoke from exhaust gases or unstable idling at set idle speed. Adjustable “mixture quality” left carburettor adjustment screw L.

Have trouble adjusting your carburetor for the Husqvarna 128R Lawn Mowers?- Bring her to our service center. We will help you.

The tool, despite its small dimensions, is a complex technical device. If you study the operation manual, it turns out that the reasons why it does not start lawn mowing, known and disposable. It is necessary to exclude the reasons that impede the start of the tool one by one. Usually they start with more accessible nodes with easy health checks.

See also: How to make a lathe from a drill without the help of others

Our client remains the prerequisites why it does not start lawn mowing, Of course, systematize according to the specifics of the operation of individual nodes. In the service, malfunctions are systematized:

  • Motor malfunction (piston wear, bearing malfunction, crankcase crack);
  • Fuel consistency failure. Clogged air filter pores or carburetor malfunction;
  • The ignition system does not work;
  • Mechanical failure. Leaking hoses, broken wires under the braid, rupture of tubes.

The user must first check whether there is fuel in the tank. Start-up is carried out in accordance with the annotation, putting the saw on its side. Set the air damper to the “closed” position, pump up fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine is running, open the air damper. Does not start lawn mowing. Repeat the operation with a slightly open choke.

Husqvarna 125R carburetor tuning without tachometer (temporary solution)

Lawn mowing is not able to work for a long time. The gearbox and engine will overheat. Mows there is an option less than 15 = 20 minutes, making a five-minute break. On a hot afternoon, working time is halved. When mowing weeds, sedge, working hours need to be reduced.

If the launch fails, we begin to find the cause of the failure:

  • Check fuel quality;
  • Make sure the candle is working and the candle channel is clean;
  • Check the cleanliness of the air filter;
  • Make sure the fuel filter is not clogged;
  • Check the purity of the breather;
  • Clean the exhaust duct.

Complex causes will be found in the diagnosis of malfunctions, leading to a serious repair of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket here and violation of the density of the inner halls with a loss of vacuum. Repairing lawn mowers at home, if it does not start, will require patience.

The fuel mixture is suitable prepared with strict observance of the proportions of gasoline and oil. With all this, you can not use a different brand of fuel. To prevent ingress of dirt, gasoline should be left in glass or iron dishes for 4.5 days. Do not use plastic containers to store fuel. Measure the oil accurately with a syringe without a needle. Use only freshly prepared consistency without leaving undeveloped fuel in the tank. If the engine picks, the lawn mower stalls, when you press the gas, you are guilty of fuel.

Lawn mowing does not start on a hot one. Push the trigger of gas and sharply pull the cord a couple of times until the engine starts, later lower the trigger. It does not start. Special repairs are required.

The check that allows accounting (software) ignition, if not started, is carried out in turn:

Husqvarna 128R in February! ,, Single ,, GUT! ,, Tax ,, Yok! Carburetor?

  • Remove the removed candle from soot and dirt, dry it, set a gap of 1 mm;
  • Connect to the high-voltage wire and check for a spark by pulling the starter a couple of times;
  • If the absence of spark passage check the integrity of the high-voltage wire;
  • Change the candle;
  • Dry the candle channel;
  • The operation of the ignition coil is immediately checked, it is faulty if the working spark does not spark.

Specifically, if the ignition coil malfunction passage lawn mowing does not start on hot, stalls, works intermittently.

Cleaning, in other words, changing the air and fuel filter, will provide the necessary consumption of ingredients entering the carburetor. There is an option to wash the air filter in soapy water, change it differently. If a nylon fabric is used, it is washed, the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the absorbing pipe open. Whether a change in the air filter is needed is determined if the engine with the air cleaner removed is started. Is it necessary to change the fuel supply grid if it does not start lawn mowing, give a hint dry candle.

Breather, air inlet for gas tank. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. Blow the hole of course with air or clean it with a needle. Clean the exhaust channel, remove the spark retardant silencer mesh.

The largest and low revolutions of the motor, even idle speed is regulated by a carburetor. The stable operation of the lawn mowers depends on the amount of supplied combustible consistency and air, their ratio. Lawn mowing does not start when the carburetor is not properly adjusted. The order of the device option for supplying fuel at low speeds (L), high speeds (N) and idle (T) is regulated by the same screws:

  1. A chainsaw should work for at least 10 minutes, because adjustment carried out on hot.
  2. The screw N is turned smoothly to the highest revolutions, then it is turned by ΒΌ counterclockwise, lowering the speed of rotation of the motor shaft.
  3. Idling is regulated by screw T, ensuring that the braid does not spin.
  4. The screw L is adjusted, first opening a very throttle, and at the end, gradually lowering the revs to stable small ones.

After adjustment, serviceable with cleaned filters, tested by ignition should ensure the operation of the motor. If the carburetor malfunction passage, after its repair and again, you will need a setting that allows you to keep accounting (software) of the feed before starting the lawn mowing.

The rarest breakdowns that prevent the operation of lawn mowers are:

  • Malfunction of the rewind spring;
  • Broken or stuck starter pulley;
  • Faulty starter assembly.

The most important malfunction, the elimination of which is required is associated with a change in the motor and possibly a breakdown of the piston group of the motor. The repair price will cost approximately 70% of the product price. Understand the reasons why it does not start lawn mowing, will help:

There are no unnecessary phrases in the operation annotation; everything that is offered is focused on the trouble-free operation of the lawn mowers. Cleaning of all parts after each cycle of work facilitates the easy removal of uncured residues and dirt. It is only necessary to clean the cooled units. This technique contributes to the air cooling quality of the motor and gearbox.

For refueling, use fuel with the oil recommended in the annotation. If the fuel mixture is left in the fuel tank, the oil will pop up and, when starting up, will sit on the flap, impairing its adjustment. The mixture gives a precipitate and clog the fuel in the carburetor.

When preserving equipment for the winter, carry out an audit, lubricate the gearbox and piston system, wrap the entire saw in an oily rag and store in a dry place.

It is impossible, unsafe for the tool and the health of the mower, to use instead of fishing line an iron cable. It cuts more efficiently, but the load on the gearbox and engine increases. A worn piece of wire at separation breaks with the movement of a bullet. Effective mowing leads to rapid wear of the piston group of the motor. For greater mowing efficiency, it is proposed to use an asterisk fishing line profile.

Carburetor adjustment lawn mowers Husqvarna 128r photo

Review: Husqvarna 128 R. Petrol trimmer. Mowing weed without unnecessary gestures? Just!

Hello, honored readers of Otzovik!

A joke is widespread in our Arctic lands “with beard”: “Our northern summer is short and not snowy.”. But still, there is a bit of truth in this: summer begins much later, and ends much earlier than in the middle zone of Russia. Well, frost with snowfall, say, in August, are not uncommon. Because, as the temperature becomes stably positive, the vegetation grows violently, trying to catch the seeds as soon as possible.

But it’s time for us “haymaking”: since the yard overgrown with dandelion, timothy, wheatgrass and other weed grass for almost a few days, you have to pick up a scythe-scythe and try to do something similar to the lawn. Adjusting the Husqvarna 137 carburetor, the carburetor is like a Husqvarna 240 or 260. That was until last year.

Last summer, I decided to keep up with the times and buy a trimmer. Electronic options dismissed immediately. I did not smile at all at the prospect of carrying a 30-meter extension cord. From gas trimmers braked at the company Husqvarna, known for the quality and reliability of its own products.

Slightly about the properties. The engine is 2-stroke, with a volume of 28 cm3, with a power of 0.8 kW (1.1 l / s).Engine speed. Up to 10,000 rpm

The gas tank (more precisely. Gas tank) has a volume of 400 ml.

The trimmer engine is equipped with a Zama carburetor. The Smart Start system provides an easy and fast engine start.

On the lid carburetor a plate with a sequence of actions when starting a cool motor is glued. For the very forgotten.

The muffler is covered by a casing, which prevents accidental contact with heated parts.

The trimmer handle is asymmetric, it is possible to move it around the bar to fit a specific person.


The trimmer control is placed on the right handle. To me, right-handed, it’s comfortable. Adjusting the carburetor of the Husqvarna 142 chainsaw. But, there is no ability to shift control to the left, which, perhaps, will create some inconvenience for lefties.

The button for stopping the motor (Stop), after moving upward, is rotated to its original position, which excludes attempts to start the motor with the electrics turned off

Adjustment The engine speed is carried out by the trigger button located in front of the right handle.

Carb adjustment lawn mowers Husqvarna 125, 128

How to adjust carburetor lawn mowers Husqvarna 125, 128 (without tachometer) Part number: 5450818-48.

Husqvarna 125R carburetor tuning without tachometer (temporary solution)

How to adjust carburetor,if you need to work, and the service with a tachometer is far away.

We run to the main working part of the tool.

The working part is covered with a protective casing.

Despite the fact that, in addition to the trimmer, in addition to the trimmer head, there is an iron disk for grass, I prefer to mow it specifically with the trimmer head, fishing line.

To extend the fishing line to the desired length, you need to press the blue button, and pull out the fishing line.

Replacing the fishing line is not difficult. To do this, press on the 2 latches on the sides of the disk and drown them a little.

. Remove the head housing.

. And change the fishing line. The back of the case is simply put on until it clicks.

If you accidentally stretched a fishing line to an enormous length, there’s nothing terrible: there is a knife on the body of the protective casing that will cut off the excess fishing line at the first turns of the motor.

We continue. To hang the trimmer on the ammunition, a loop is attached to the bar in a comfortable place. Adjustment of its position can be carried out locally, after putting on the ammunition.


Ammunition itself. On both shoulders.

Dressed like a satchel, snaps in front, belts are personalized.

A plastic shield covers, sorry, genitals, such a safety measure.

As I mentioned, the kit comes with a grass disc. Carb adjustment and repair. About the Chinese modification. Husqvarna 365 chainsaw. I tried it once last year, I didn’t like it. It will be good on smooth, devoid of bumps and hills, clearings, as well as when cutting hard grass.

To transport the trimmer with the disc installed, in order to avoid injury, it can be covered with a plastic casing.

Now specifically about the experience of use. As already stated, it is more convenient for me to work with fishing line, in other words with a trimmer head. There are several circumstances. In addition to the already mentioned convexity of the site, mowing fishing line allows mow grass close to the fence and other obstacles, the fishing line will only peel over them. In the, using the nozzle, adjusting the Husqvarna 128r carburetor is cleaning. Therefore unsafe mow grass to cultivated trees and shrubs, it is imperative to leave a mowed strip. It should also be borne in mind that mowing tightly against fences, etc., causes excessive consumption of fishing line.

It should be noted that the fishing line does not cut, but cuts the grass, therefore, when harvesting hay for the Burenoks, the trimmer will have to prefer an ordinary scythe.

During mowing, the fishing line often throws out pieces of mowed grass, particles of land and small pebbles, moreover, high enough, therefore it is better to use eye protection. I still hope for the original Russian “Maybe”.

It must be said that the trimmer cuts the grass evenly, the main thing. Do not take a very wide grip. In this case, the fishing line does not begin to cut the grass, but twist it around the head.

I fill the trimmer with the consistency of the 92nd gasoline with special oil (for revolving motor vehicles). One full refueling lasts about 1 hour for continuous operation.

Also, quite often it is necessary to clean the lower part of the protective casing of the accumulated mass, consisting of small parts of mowed grass. By the way, when working with the trimmer, the jacket and pants in front also throw small pieces of grass. Not solid, of course, but decent enough.

Despite the weight of 5 kg, with the right fit ammunition, the weight of the trimmer is not actually felt. The back does not get tired for 2-3 hours of work, as you work in a comfortable position.

The noise of the motor is not to say that it is very sonorous, and far from whispering, in principle. Acceptable without headphones.

In general, the second season I use a trimmer, and I’m not overjoyed. When is carburetor adjustment for a chainsaw necessary? Husqvarna 137. Huter bs45 chainsaw. No “jambs” was not in work. Starts on “Hooray”, works without troubles, well, and the rest is dependent on the mowers.