Jonsered Essential Maintenance and Carburetor Adjustments for RS 52 Brush Cutter
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MAINTENANCE

Carburetor

Your Jonsered product has been designed and manufactured to specifications that reduce harmful exhaust fumes. The engine will be run in after it has used 8-10 tanks of fuel. To ensure that the engine runs at peak performance and produces as little harmful exhaust fumes as possible after the running-in period, ask your dealer/service workshop (which has a rev counter for this purpose) to adjust your carburettor.

WARNING! The complete clutch cover and

!shaft must be fitted before the machine is started, otherwise the clutch can come loose and cause personal injury.

Carburetor adjustment

The carburettor can be designed in different ways, depending on the existing environmental and emissions legislation. Some machines are equipped with movement limiters on the carburettor’s adjuster screws. These limit the adjustment range to a maximum of 1/2 turn.

1/2

1/2

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

RS44RS52

•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.

The basic setting can vary between: H = 1 - 1 1/4 turns and L = 1 - 1 1/4 turns.

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.

Rec. idle speed 2700 rpm

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.

CAUTION! The machine should only be run for short periods at its highest speed. For optimum adjustment of the carburettor, contact a qualified dealer/service workshop that has a revolution counter at their disposal.

Recommended max. speed: See the Technical data section.

During the running-in period (8-10 tanks of fuel) the maximum speed should be set 600-700 rpm below the recommended maximum speed (= open the high speed jet H a further 1/8 turn).

Conditions

•Before any adjustments are made, make sure that the air filter is clean and the air filter cover is fitted. If you adjust the carburettor when the air filter is dirty it will result in a leaner mixture when the filter is finally cleaned. This can lead to serious engine damage.

•Carefully turn both jets, L and H, so that they are midway between fully screwed in and fully screwed out.

•Do not attempt to adjust the L and H jets beyond either stop as this could cause damage.

•Now start the machine according to the starting instructions and let it warm up for 10 minutes.

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.

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Contents Operator’s manual EPA Symbols KEY to SymbolsContents Dear customer IntroductionWhat is what on the clearing saw? RS44 What is WHAT?What is what on the clearing saw? RS52 Personal protective equipment General Safety PrecautionsStop switch Machine′s safety equipmentThrottle lockout Vibration damping system Cutting attachment guardQuick release MufflerLocking screw Locking nutCutting equipment Cutting equipmentSharpening the saw blade Sharpening grass cutters and grass bladesTrimmer head Assembling the handlebar and throttle AssemblyTransport position, handlebar Assembling the cutting equipmentFitting the trimmer guard and trimmer head Trimmy SII Fitting the blade guard and saw bladeFitting other guards and cutting attachments Adjusting the harness and clearing sawStandard harness Vector harness Adjusting the harnessCorrect balance Fuel Handling Fuel safetyFuel Mixing FuelingCheck before starting Starting and StoppingStarting and stopping Cold engineStopping StartingWorking Techniques Basic safety rulesGeneral working instructions ABC of clearingWorking methods Forestry clearing using a saw bladeBrush cutting with a saw blade Grass clearing using a grass bladeTrimming Grass trimming with a trimmer headCarburetor MaintenanceLow speed jet L Fine adjustment of the idle speed THigh speed jet H GR41, GR50, RS44 High speed jet H RS52Cleaning the air filter Correctly adjusted carburetorMuffler Cooling systemSpark plug Bevel gearMaintenance Daily Weekly Monthly Maintenance scheduleTechnical data Technical DataYour Warranty Rights and Obligations Federal Emission Control Warranty StatementTrimmy SII Page ´z+R¶5Q¨ Page 1150269-95 ´z+R¶5Q¨ ´z+R¶5Q¨

RS52 specifications

The Jonsered RS52 is a robust and high-performance chainsaw renowned for its blend of power and user-friendly design, making it an ideal choice for both professional lumberjacks and serious DIY enthusiasts. This versatile tool is engineered to tackle a range of forestry tasks, from felling trees to trimming branches and preparing firewood.

One of the main features of the RS52 is its powerful engine. The chainsaw is equipped with a 52cc two-stroke engine that delivers impressive performance, enabling it to handle larger logs with ease. This power ensures efficiency and speed during cutting operations, allowing users to complete their tasks in less time. Despite its powerful engine, the RS52 is designed to minimize fuel consumption, making it an eco-friendly option for users who are conscious about their environmental impact.

In terms of technology, the Jonsered RS52 boasts a well-designed air injection system that helps to keep the air filter cleaner for longer durations. This innovation not only extends the life of the filter but also maintains engine performance by ensuring a steady supply of clean air. Additionally, this chainsaw features an easy start mechanism, reducing the effort needed to start the engine and making it user-friendly for individuals of all skill levels.

Safety is a paramount consideration in the design of the RS52. The chainsaw incorporates a chain brake system that allows for quick stopping in the event of kickback, significantly enhancing user safety. Furthermore, the ergonomic design of the handle promotes comfort during use, reducing fatigue even during prolonged cutting sessions.

The RS52 is equipped with a durable chain and bar, designed for optimal cutting performance and longevity. The chain tensioning system allows for straightforward adjustments, ensuring that the chain remains taut and functioning properly.

Overall, the Jonsered RS52 chainsaw is a powerful and efficient tool that combines advanced technology with user-centric features. Its robust performance, safety mechanisms, and ease of use make it a preferred choice for professionals and hobbyists alike, proving its worth in various cutting tasks. Whether you are a seasoned professional or a weekend woodworker, the RS52 is engineered to deliver reliability and exceptional results in every operation.
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