Jonsered GT2123 manual Maintenance, Carburettor, Muffler, Function, Adjusting the idle speed

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MAINTENANCE

Carburettor

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.

Function

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

•Adjusting the carburettor means that the engine is adapted to local operating conditions, e.g. climate, altitude, petrol and the type of 2-stroke oil.

Adjusting the idle 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.

Before any adjustments are made, make sure that the air filter is clean and the air filter cover is fitted.

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.

Muffler

CAUTION! Some mufflers are fitted with a catalytic converter. See chapter on Technical data to see whether your machine is fitted with a catalytic converter.

The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material.

Some mufflers are equipped with a special spark arrestor mesh. If your machine has this type of muffler, you should clean the mesh at least once a week. This is best done with a wire brush.

On mufflers without a catalytic converter the mesh should be cleaned weekly, or replaced if necessary. On mufflers fitted with a catalytic converter the mesh should be checked, and if necessary cleaned, monthly. If the mesh is damaged it should be replaced. If the mesh is frequently blocked, this can be a sign that the performance of the catalytic converter is impaired. Contact your dealer to inspect the muffler. A blocked mesh will cause the machine to overheat and result in damage to the cylinder and piston. See also instructions under the heading Maintenance.

CAUTION! Never use a machine with a defective muffler.

WARNING! Mufflers fitted with catalytic

!converters get very hot during use and remain so for some time after stopping. This also applies at idle speed. Contact can result in burns to the skin. Remember the risk of fire!

16 – English

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Contents Operator′s manual KEY to Symbols SymbolsContents Introduction Dear CustomerWhat is WHAT? What is what on the grass trimmer?General Safety Precautions Personal protective equipmentStop switch Machine′s safety equipmentMuffler Cutting equipment Trimmer headAssembly Connecting throttle cable and stop switch wiresAdjusting the throttle wire Fitting the main bodyAssembling the cutting equipment Fitting the trimmer guard and trimmer headFuel Handling Fuel safetyFuel Fuelling MixingCheck before starting Starting and StoppingStarting and stopping Basic safety rules Working TechniquesGeneral working instructions Basic working techniquesGrass trimming with a trimmer head TrimmingMaintenance Adjusting the idle speedCarburettor MufflerCleaning the air filter Cooling systemSpark plug Air filterMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical dataEC-declaration of conformity Applies to Europe only Page Page Page 1153405-26 ´z+UHT¶6¨ ´z+UHT¶6¨ Original instructions

GT2123 specifications

The Jonsered GT2123 is a powerful garden tractor designed for homeowners who want to maintain their lawns and gardens with efficiency and ease. This robust machine is engineered to handle a variety of tasks, making it an essential tool for anyone looking to achieve a pristine outdoor space.

At the heart of the GT2123 lies its reliable engine. The tractor is equipped with a potent 23 HP Briggs & Stratton engine, known for its durability and performance. This engine provides ample power for mowing, mulching, and towing, allowing users to tackle even the most demanding gardening jobs without strain. The automatic transmission system ensures smooth operation, enabling the operator to focus on the task without worrying about shifting gears manually.

One of the standout features of the GT2123 is its cutting deck. The tractor comes with a 42-inch cutting deck that is designed for efficient grass cutting. Its adjustable cutting heights provide versatility for different grass lengths, ensuring a clean and manicured lawn. Additionally, the deck utilizes advanced mulching technology, allowing homeowners to recycle clippings back into the yard, promoting a healthier lawn ecosystem.

The ergonomics of the Jonsered GT2123 are also impressive. The tractor is designed with driver comfort in mind, featuring a high-back seat and an easy-to-use steering wheel that minimizes fatigue during long mowing sessions. The controls are intuitively positioned, allowing easy access to essential functions like mowing speed and deck engagement.

For added convenience, the GT2123 includes a range of technology-driven features. The tractor is equipped with a cutting-edge safety system that automatically shuts off the engine when the operator dismounts, minimizing the risk of accidents. Furthermore, the dashboard is fitted with a clear display that provides essential information, such as fuel levels and engine status, allowing for proactive maintenance.

The GT2123 also incorporates high-quality wheels and tires, designed for optimal traction on various terrains. Whether maneuvering across flat lawns or tackling hilly areas, this tractor maintains stability and control, ensuring smooth operation.

In summary, the Jonsered GT2123 combines power, efficiency, and user-friendly design. With its reliable engine, versatile cutting deck, thoughtful ergonomics, and advanced safety features, it stands out as a top choice for homeowners looking to maintain their outdoor spaces effectively and comfortably. This garden tractor is a sound investment for anyone seeking quality performance in their gardening tasks.
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