Husqvarna 323r DIY repair

Details: husqvarna 323r DIY repair from a real master for the site my.housecope.com.

As well asto make sure that the Husqvarna engine is working as expected and that the trimmer (petrol cutter, brushcutter) is at its maximum efficiency.

Before adjusting the Husqvarna, do the trimmer maintenance (wash the petrol cutter and the engine, replace the spark plug, eliminate minor defects).

Be sure to wash the foam air filter element. Wash the element in warm water and soap, then wring out and dry (or replace if old or damaged).

Note: If you adjust the Husqvarna carburetor with a dirty air filter, then after cleaning the air filter, the fuel mixture will become much leaner (which can lead to poor performance or even engine damage).
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Install a trimmer head with a cord of maximum diameter and standard length (up to the cutter blade in additional protection) to put a load on the engine when adjusting the high speed screw of the Husqvarn carburetor.
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Start the petrol cutter according to the Husqvarna Manual and warm up for 10 minutes (if the trimmer head rotates at idle speed, then the idle screw, i.e. the lower one, must be turned counterclockwise until the trimmer head stops rotating).
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Carefully turn both needles (right and left) midway between fully unscrewed and fully screwed in (do not turn by the stopper !, this may damage the Husqvarn engine).

There are three adjusting screws for adjusting the Husqvarna carburetor: right, left and bottom.
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1) Right screw L - regulates the enrichment of the mixture at low speed (controlled first):
Find the maximum idle speed by slowly turning the right screw to the right and left.
Then turn this screw ¼ turn counterclockwise.
Note: From the Husqvarna factory, the right screw has been completely removed (0.5 turn). He is now looking at 11 o'clock.
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2) Bottom screw T - adjusting the idle speed of the Husqvarna engine (if necessary): turning the screw clockwise increases the idle speed, counterclockwise - decreases them.
  1. A cold engine idles steadily.
  2. A hot engine does not idle too high.
  3. There is sufficient headroom before the trimmer head starts rotating.
  4. The engine runs stably in any position (for example, when the knife is suddenly lowered).

Note: From the factory (Husqvarna) the idle screw from fully tightened was unscrewed by 8 full revolutions and "2 hours" (now it remains so). The recommended engine idle speed for Husqvarna petrol cutters is 2.900 rpm.
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Video (click to play).

3) Left screw H - regulates the enrichment of the high-speed mixture (adjustable last).
It regulates maximum revs, engine power, temperature and fuel consumption.

Note: The Husqvarna engine must not run at full speed for more than 10 seconds!

  • Open the throttle fully (full throttle) and slowly turn the left screw clockwise until the Husqvarn engine speed is reduced (audibly).
  • Then turn the left screw very slowly counterclockwise until the engine runs roughly.
  • Then turn the propeller back a small amount clockwise slowly until the Husqvarn engine runs smoothly.

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This completes the adjustment of Husqvarna.

Note: The recommended maximum high speed of the Husqvarna engine is 11.500 rpm.
The maximum engine power output of the Husqvarna 333R petrol cutter is 1.6 kW (2.1 HP) at 8,400 rpm.

Note: On a new Husqvarna trimmer from the factory (Husqvarna), the left screw was completely unscrewed (0.5 turn) and blocked (filled in) with hard plastic, which I drilled out after the warranty period. Now the left screw (as well as the right one) points to approximately 11 o'clock.

The engine quickly, steadily and steadily picks up speed, and quadruples a little at maximum speed, the T-35 trimmer head should not rotate at idle speed.

The required composition (quality) of the air-fuel mixture is adjusted (changed) by turning the screws for adjusting the fuel supply to the intake air flow (right and left). The amount of mixture supplied to the cylinder is metered by the throttle valve.
If you turn them clockwise, the mixture sucked into the cylinder becomes leaner (less fuel in the air / fuel ratio) and the engine speed increases, while the Husqvarna engine runs softer (gains little speed) and the power drops dramatically. In addition, having increased revs, less oil is supplied to the cylinder on a lean mixture with gasoline (lubrication is worse) and so you can screw up the engine. Well, the trimmer will not start well.
If the screws are turned counterclockwise, the mixture sucked into the cylinder becomes richer (more fuel in the air / fuel ratio) and the engine speed decreases, while at low speeds more gasoline and oil enter the cylinder (better traction, better lubrication), but the Husqvarna engine It "spins" badly (it picks up speed badly) and more carbon deposits form in the cylinder!

Do-it-yourself Husqvarna 142 chainsaw repair

The carburetor is one of the important mechanical components that make up a chainsaw. Its tasks are to mix fuel with air and supply the resulting composition to the engine. But during the operation of the chainsaw, situations arise when adjusting the carburetor Husqvarna becomes necessary. Depending on the reasons, the carburetor adjustment of the 142 chainsaw and other series is performed to prevent the following situations:

  • the presence of interruptions in the operation of the engine, accompanied by its shutdown;
  • excessive fuel consumption during operation.

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Since the carburetor affects the quality of the fuel, in the former case, the need for carburetor settings on a 137 or other professional series saw, such as the Huskvarna 240 or 260, implies influencing enough fuel entering the carburetor to mix with the air mass. It is known that maximum productivity is possible only with a certain ratio of these substances. The second moment of adjusting the chainsaw of a carburetor mixer is due to the lack of incoming air, which causes underheating of the injected gasoline with its output in the form of thick smoke. Timely change of parameters with your own hands to reduce the amount of fuel introduced will significantly reduce the consumption of this product.

The renovation itself will save not only the budget, but also the time spent on transportation and the queue at the workshop. The same applies to changing various spare parts in a gasoline-powered tool such as a chain on a chainsaw or a universal trimmer head on a motor pump or oil for electric drives.

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Neglecting deviations in the normal operation of a gasoline tool is fraught with the fact that even with a strong desire Husqvarna chainsaw carburetor adjustment may be useless and it will be necessary to replace either this unit or already engine components that are subject to prolonged thermal or mechanical stress. Therefore, as soon as the saw shows the first deviations, it is necessary to make immediate repairs in the form of simple corrective actions. Among such changes in work, we note:
  1. The chainsaw slows down too slowly;
  2. The tool does not reach its maximum power and it drops quickly when loaded;
  3. The motor stops frequently;
  4. There is a lot of noise when using the chain saw;
  5. The chainsaw releases unusual amounts of smoke, increasing with each load step.

As soon as you notice any of the above deviations, it is imperative to adjust the 435 scythe carburetor or a slightly reinforced copy of the Husqvarna 55 saw. Timely maintenance also augurs no waste for complete replacement of parts and chainsaw drive units and fuel system. Therefore, with the difficulty of the Husqvarna 340 carburetor system and all other tuning lines, they will save both the chainsaw and the work processes, as well as the owner's money. If necessary, in the Kosa-Motors company you can order the infusion of mechanisms, replacement of spare parts, and also buy a trimmer line with advice on its self-installation.

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In all chainsaws Adjusting the Husqvarna carburetor happens in a similar way, since all products have the same set of mechanisms. For example, if you are tuning systems in a 236 series gasoline tool, the process is followed by finding the highest idle speed by slowly turning the adjusting screws L for a low speed jet, T for a high speed jet and idle speed adjustment. The self-adjustment process consists of several periods associated with the rotation of the L and H screws, which control the throttle valve to supply the fuel mixture and adjust the T screw, adjust the idle speed. Depending on the insertion parameter, the saw is adjusted in the following sequence:

Quite a common problem with chainsaws Husqvarna 137 and 142... breakdown of the oil pump. In that video displayed quickly.