Husqvarna Official Manual: Maintenance and Carburetor Adjustments for 535RX & 535RXT Customers
Page 27

MAINTENANCE

Carburetor

Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. After the engine has used 8-10 tanks of fuel the engine will be run-in. To ensure that it continues to run at peak performance and to minimise harmful exhaust emissions after the running-in period, ask your dealer/ service workshop (who will have a rev counter at their disposal) to adjust your carburettor.

Function

•The carburetor governs the engine’s speed via the throttle control. Air and fuel are mixed in the carburetor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best performance from the machine.

•The setting of the carburetor means that the engine is adapted to local conditions, for example, the climate, altitude, fuel and the type of 2-stroke oil.

•The carburetor has three adjustment controls: L = Low speed jet

H = High speed jet

T = Idle adjustment screw

L

H

T

•The L and H-jets are used to adjust the supply of fuel to match the rate that air is admitted, which is controlled with the throttle. If they are screwed clockwise the air/fuel ratio becomes leaner (less fuel) and if they are turned anti-clockwise the ratio becomes richer (more fuel). A lean mixture gives a higher engine speed and a rich mixture gives a lower engine speed.

•The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.

Basic setting

•The basic carburetor settings are adjusted during testing at the factory. The basic setting is richer than the optimal setting and should be maintained for the first few hours the machine is in use. The carburettor should then be finely adjusted. Fine adjustment should be carried out by a skilled technician.

CAUTION! If the cutting attachment rotates when the engine is idling the idle adjustment screw T should be turned anti-clockwise until the cutting attachment stops.

Adjustment of the idle speed

Adjust the idle speed using the idle adjustment screw T, if it is necessary to readjust. First turn the idle adjustment screw T clockwise until the cutting attachment starts to rotate. Then turn the screw anticlockwise until the cutting attachment stops. The idle speed is correctly adjusted when the engine will run smoothly in every position. The idle speed should also be well below the speed at which the cutting attachment starts to rotate.

T

!

WARNING! If the idle speed cannot be

adjusted so that the cutting attachment

 

stops, contact your dealer/service

 

workshop. Do not use the machine until

 

it has been correctly adjusted or

 

repaired.

Adjusting the start throttle speed

The correct start throttle speed is set by means of an adjuster on the rear of the handle next to the cable. Use this screw (4 mm Allen screw) to increase or decrease the start throttle speed.

5 mm

Proceed as follows:

1Run the machine at idle.

2Press the start throttle lock as described under the heading Starting and stopping.

3If the start throttle speed is too low (below 4000 rpm), turn the adjuster screw A clockwise until the cutting attachment starts to rotate. Then turn A clockwise a further 1/2 turn.

English – 27

Page 26 Page 28
Image 27
Page 26 Page 28
Contents 535RX, 535RXT Symbols KEY to SymbolsContents Dear customer IntroductionWhat is what on the brush cutter? What is WHAT?Personal protective equipment General Safety PrecautionsThrottle lockout Machine′s safety equipment535RX, 535RXT Stop switchCutting attachment guard Vibration damping systemMuffler Quick releaseCutting equipment Locking nutCutting equipment Sharpening the saw blade Sharpening grass cutters and grass bladesTrimmer head Attachment without an approved guard AssemblySee the chapter on Technical data. If an Fitting the guard extensionFitting the blade guard and saw blade Fitting a blade guard, grass blade and grass cutterFitting other guards and cutting attachments Adjusting the harness and brush cutter Standard harnessTriobalance harness Correct balance Fuel safety Fuel HandlingFuel Use. This also applies during idling. Be FuelingMixing Muffler gets very hot during and afterStarting Starting and StoppingCheck before starting Starting and stoppingStopping For throttle handles with a start throttle lockABC of clearing Basic safety rulesWorking Techniques General working instructionsRotating, as this can result in serious Up into the eyes causing blindness orAreas where it is difficult to see Is running or the cutting equipment isBrush cutting with a saw blade Forestry clearing using a saw bladeClearing Grass clearing using a grass bladeGrass trimming with a trimmer head TrimmingSweeping CuttingCarburetor MaintenanceMuffler Cooling systemBevel gear Oiling the air filter Cleaning the air filterAir filter Spark plugMaintenance Daily Weekly Monthly Maintenance scheduleTechnical data Technical DataApproved accessories Type Cutting attachment guard, Art. no Your Warranty Rights and Obligations Emission Warranty Parts List Page S35 2,7mm 095-.106 25 m 15 cm T35, T35x T45, T45x Auto Trimmy SII Page Page Original instructions 1154017-95

535RX, 535RXT specifications

The Husqvarna 535RXT and 535RX are advanced professional-grade string trimmers designed to tackle tough landscaping tasks with efficiency and precision. Renowned for their powerful performance and innovative features, these trimmers are ideal for both commercial landscapers and dedicated homeowners looking for superior reliability and durability.

One of the standout features of the 535RXT and 535RX is their powerful engine technology. Equipped with a 34.6 cc X-Torq engine, these trimmers deliver high performance with reduced fuel consumption and lower emissions, aligning with eco-friendly practices. The X-Torq engine ensures optimal torque and power, making it easy to cut through thick grass and dense vegetation.

Both models are equipped with an ergonomic handle that enhances comfort and reduces user fatigue during prolonged use. The adjustable harness and the lightweight design make maneuvering easier, which is especially advantageous during long hours of operation. This thoughtful ergonomics allows for efficient trimming without compromising on operator comfort.

Versatility is another key characteristic of the Husqvarna 535RXT and 535RX. They are equipped with the patented Smart Start technology, which simplifies the starting process. This feature minimizes resistance in the starter cord, allowing the engine to start quickly with less effort. As a result, users will spend less time preparing to work and more time on the task at hand.

The trimmers come with a robust 2-line cutting system that efficiently handles various types of grass and vegetation. The efficient cutting action leads to cleaner cuts and less wear on the machine. Adjusting the length of the cutting line is straightforward and helps in maintaining high productivity during trimming sessions.

Safety is a consideration in the design of the 535RXT and 535RX models. The trimmers feature a guard that protects the working parts and helps prevent debris from flying towards the operator. Furthermore, the anti-vibration system significantly reduces vibrations experienced by the user, leading to increased comfort and reduced risk of operator fatigue during extended use.

Overall, the Husqvarna 535RXT and 535RX offer powerful performance, user-friendly features, and impressive versatility. Whether for professional landscaping or residential upkeep, these trimmers stand as reliable choices for anyone looking to maintain their outdoor spaces with precision and care. With a commitment to innovation and quality, Husqvarna continues to lead in the outdoor equipment industry, making these models a worthy investment for serious users.
Top Page Image Contents