Husqvarna RS52 manual Fine adjustment of the idle speed T, High speed jet H GR41, GR50, RS44

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MAINTENANCE

Fine adjustment of the idle speed T

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.

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.

High speed jet H (GR41, GR50, RS44)

The high speed jet H affects the engine power, speed, temperature and fuel consumption. If the high speed jet H is set too lean (screwed in too far) the engine speed will be too high and cause engine damage. Do not let the engine run at full speed for more than 10 seconds.

Apply full throttle and turn the high speed jet H very slowly clockwise until the engine slows down. Then turn the high speed jet H very slowly anticlockwise until the engine starts to run unevenly. Now turn the high speed jet H slowly clockwise a little way until the engine runs smoothly.

H

Note that the engine should not be under load when you adjust the high speed jet H. You should therefore remove the cutting attachment, nut, support flange and drive disc before adjusting the high speed jet H.

The high speed jet H is adjusted correctly when the machine burbles a little. If the machine races then the setting is too lean. If the engine produces a lot of smoke and burbles a lot then the setting is too rich.

CAUTION! For optimum adjustment of the carburettor, contact a qualified dealer/service workshop that has a revolution counter at their disposal.

High speed jet H (RS52)

The high speed jet H affects the engine power, speed, temperature and fuel consumption. If the high speed jet H is set too lean (screwed in too far) the engine speed will be too high and cause engine damage. Do not let the engine run at full speed for more than 10 seconds.

Setting procedure without a load (Blade can be used)

The machine is equipped with speed control in the ignition system. It is extremely important to be aware of this when adjusting the carburettor.

RS52: Speed control at: 13500 rpm

When attempting to adjust the speed over that specified, the speed is not changed, but only causes the engine to receive too little fuel resulting in a large risk of engine failure.

Run the machine warm for approximately 5 minutes alternating between short intervals of full throttle and idling. When the carburettor is to be adjusted, apply full throttle and turn the H-needle anti-clockwise until the engine speed reaches 10,500-11,000 r/min (burbles) or until the cap reaches its stop position. Now turn the H-needle slowly clockwise until the engine reaches the speed when the speed control comes into force. In some cases, speed control can come into force at 200-300 revs below or above that specified. It is important that you do not continue to turn the H-needle clockwise when the engine speed has stabilised. Screw the H-needle (anti-clockwise) a few tenths of a turn instead.

H

Setting procedure with a load (Trimmer head should be used)

Ensure the length of the trimmer cord is correct, i.e. exactly reaches the knife on the trimmer guard. Use either 3 mm or 3.3 mm diameter trimmer cord.

Run the machine warm for about 5 minutes mostly at full throttle. When the carburettor is to be adjusted, apply full throttle and turn the H-needle anti-clockwise until the engine burbles or until the cap reaches its stop position. (If the engine runs smoothly when the cap is in its stop position no further adjustment is necessary!) Turn the H-needle slowly clockwise until the engine runs absolutely smoothly. (Burbling has stopped completely). Now screw the H-needle (anti- clockwise) a few tenths of a turn.

H

CAUTION! For optimum adjustment of the carburettor, contact a qualified dealer/service workshop that has a revolution counter at their disposal.

Correctly adjusted carburettor

When the carburettor is correctly adjusted the machine will accelerate without hesitation and burble a little at maximum speed. It is also important that the cutting attachment does not rotate at idle. If the low speed jet L is set too lean it may cause starting difficulties and poor acceleration. If the high speed jet H is set too lean it will result in less power, less performance, poor acceleration and/or damage to the engine. If both the L and H jets are set too rich it will results in acceleration problems or too low a working speed.

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Contents Operator′s manual Symbols KEY to SymbolsContents Dear Customer IntroductionWhat is what on the clearing saw? GR41/GR50/RS44 What is WHAT?What is what on the clearing saw? RS52 Personal protective equipment General Safety PrecautionsMachine′s safety equipment Stop switchThrottle lockout Muffler Cutting attachment guardVibration damping system Quick releaseLocking screw Locking nutCutting equipment Cutting equipmentSharpening grass cutters and grass blades Trimmer head Sharpening the saw bladeTransport position, handlebar AssemblyAssembling the handlebar and throttle GR41/GR50 Assembling the handlebar and throttle RS44/RS52Assembling the cutting equipment Fitting a blade guard, grass blade and grass cutterFitting the blade guard and saw blade Fitting the trimmer guard Fitting other guards and cutting attachmentsTrimmer head Trimmy SII Adjusting the harness and clearing saw Standard harnessVector harness Correct balance Fuel safety Fuel HandlingFuel Mixing FuellingCold engine Starting and StoppingCheck before starting Starting and stoppingStopping StartingABC of clearing Basic safety rulesWorking Techniques General working instructionsWorking methods Forestry clearing using a saw bladeBrush cutting with a saw blade Grass clearing using a grass bladeTrimming Grass trimming with a trimmer headCarburettor MaintenanceHigh speed jet H RS52 Fine adjustment of the idle speed TCorrectly adjusted carburettor High speed jet H GR41, GR50, RS44Air filter Cleaning the air filterMuffler Cooling systemSpark plug Bevel gearMaintenance Daily Weekly Monthly Maintenance scheduleTechnical data Technical DataTechnical data RS44 RS52 Engine EC-declaration of conformity Applies to Europe only Poly Trim Trimmy SII Page Auto ´z+Rq,¶60¨ Page 1150811-26 ´z+Rq,¶60¨ ´z+Rq,¶60¨

GR50, GR41, RS44, RS52 specifications

Husqvarna is renowned for its commitment to quality and performance in outdoor power equipment, and its range of robotic mowers epitomizes this standard. Among the standout models are the Husqvarna GR41, RS52, RS44, and GR50. Each of these mowers comes packed with features that cater to a variety of mowing needs, ensuring efficient lawn maintenance while allowing users to enjoy more free time.

The Husqvarna GR41 is designed for smaller lawns of up to 600 square meters. Its compact size and smart navigation technology enable it to maneuver efficiently around tight spaces and complex garden layouts. One of its remarkable features is the intuitive smartphone app that allows users to schedule mowing times, adjust settings, and receive notifications. The GR41's robust blade system ensures a clean cut, promoting healthier grass growth.

Moving on to the RS52, this model is well-suited for medium-sized lawns up to 800 square meters. It features advanced terrain handling capabilities, allowing it to tackle slopes of up to 25 degrees. Its weather-resistant design ensures durability in varying conditions. Additionally, the RS52 employs GPS-assisted navigation, which maps the mowing area and optimizes its route for maximum efficiency. This model also offers customizable mowing schedules, further enhancing convenience for users.

The Husqvarna RS44 is a step up, accommodating larger areas of up to 1,200 square meters. Its enhanced battery life allows for longer mowing sessions, and it boasts a powerful motor that adapts to different grass conditions. The RS44 incorporates smart technology for automated charging, meaning it returns to its station independently when the battery runs low. Its robust build ensures it can handle more demanding mowing tasks without compromising performance.

Finally, the Husqvarna GR50 stands out for its capability to manage expansive areas of over 1,600 square meters. This model integrates advanced AI technology for efficient mowing operations, adapting its patterns based on lawn growth and weather conditions. The GR50 features a larger cutting deck for quicker mowing and boasts a noise reduction system for quieter operation. Its rugged design and superior intelligence make it an ideal choice for users with larger lawns seeking a hassle-free mowing experience.

Together, these models represent Husqvarna's dedication to innovation and reliability, providing users with state-of-the-art solutions for automated lawn care. Whether managing small or large spaces, Husqvarna's robotic mowers deliver outstanding performance and efficiency.
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