Jonsered 2125 manual Maintenance, Carburetor

Page 20

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.

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

•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.

Rec. idle speed 2700 rpm

Recommended max. speed: See the Technical data section.

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.

Fine adjustment

•When the machine has been ”run-in” the carburetor should be finely adjusted. The fine adjustment should be carried out by a qualified person. First adjust the L- jet, then the idling screw T and then the H-jet.

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.

Low speed jet L

•Try to find the highest idling speed, turning the low speed needle L clockwise respectively counter-clockwise. When the highest speed has been found, turn the low speed needle L 1/4 turn counter-clockwise.

+ 1/4

L

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.

20 – English

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Contents Operator’s manual EPA KEY to Symbols SymbolsContents Personal protective equipment Safety InstructionsMachine′s safety equipment Vibration damping system MufflerCutting equipment Locking nutNever use a machine that has a faulty muffler Safety Instructions Trimmer head Cutting equipmentSharpening grass cutters and grass blades General safety precautions Fuel safetyStarting Transport and storageBasic safety rules Grass clearing using a grass bladeGeneral working instructions Basic working techniquesGrass trimming using a trimmer head and plastic blades TrimmingWhat is WHAT? What is what on the trimmer?Assembly Fitting the loop handleFitting the J-handle Fitting blades and trimmer headsFitting the trimmer guard and Auto 32 trimmer head Guard Fitting other guards and cutting attachmentsFitting the trimmer guard and trimmer head Fuel Handling FuelGasoline Two-stroke oilFueling Starting and stopping Starting and StoppingCheck before starting Stopping Maintenance CarburetorFine adjustment of the idle speed T Correctly adjusted carburetorMuffler High speed jet HCleaning the air filter Cooling systemBevel gear Air filterMaintenance schedule Daily maintenanceWeekly maintenance Monthly maintenanceTechnical Data Technical dataApproved accessories Type Cutting attachment guard, Art. no Federal Emission Control Warranty Statement Your Warranty Rights and ObligationsTrimmy H S35 25 m ´z*x3¶5U¨ Auto 1088931-95 ´z*x3¶5U¨ ´z*x3¶5U¨

2125 specifications

The Jonsered 2125 is a powerful and versatile chainsaw that has earned a reputation among forestry professionals and enthusiasts alike. Engineered for performance and durability, this model incorporates several features and technologies that set it apart from its competitors.

At its heart, the Jonsered 2125 boasts a robust 50cc engine, designed to deliver impressive power while maintaining efficiency. The high power-to-weight ratio ensures that users can tackle demanding tasks without the strain that typically accompanies heavier models. This chainsaw strikes an excellent balance between performance and ease of use, making it suitable for both novice and experienced users.

One of the standout features of the Jonsered 2125 is its advanced ignition system, which includes an electronically controlled ignition module. This innovation enhances starting reliability, even in challenging conditions. The saw's carburetor is finely tuned for optimal fuel delivery, contributing to consistent operation and reduced emissions. Users will appreciate the environmentally friendly design, which meets stringent emission standards without compromising on performance.

The chainsaw's ergonomics play a crucial role in the overall user experience. With a well-designed handle and lightweight construction, the Jonsered 2125 reduces operator fatigue during extended use. The anti-vibration technology integrated into the design minimizes vibrations felt in the handles, allowing for safer and more comfortable operation.

Safety features are paramount in the design of the Jonsered 2125. The chainsaw is equipped with a chain brake that activates quickly in emergencies, preventing kickback incidents. Additionally, the throttle lock ensures that the chainsaw does not accidentally start, providing peace of mind to users during transport and setup.

Maintenance is made straightforward with the Jonsered 2125. The side-mounted chain tensioner allows for quick adjustments without the need for special tools. This feature is particularly valuable for users who require a reliable chainsaw ready for action at a moment’s notice.

In conclusion, the Jonsered 2125 is a highly capable chainsaw that combines power, efficiency, and user-friendly features. With its advanced technologies, ergonomic design, and strong safety characteristics, it remains a preferred choice for those who demand quality and performance in their outdoor tools. Whether conducting professional forestry work or tackling home improvement projects, the Jonsered 2125 delivers reliable results.
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