Jonsered GC 2125C manual Muffler, Fine adjustment of the idle speed T, High speed jet H

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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

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 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.

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.

H

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

Correctly adjusted carburetor

When the carburetor 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.

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 screen. If your machine has this type of muffler, you should clean the screen at least once a week. This is best done with a wire brush.

On mufflers without a catalytic converter the screen should be cleaned weekly, or replaced if necessary. On mufflers fitted with a catalytic converter the screen should be checked, and if necessary cleaned, monthly. If the screen is damaged it should be replaced.

If the screen 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 screen will cause the machine to overheat and result in damage to the cylinder and piston.

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!

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Contents Operator’s manual EPA Symbols KEY to SymbolsContents Dear customer IntroductionGC2125C What is WHAT?What is what? Personal protective equipment General Safety PrecautionsThrottle lockout Machine′s safety equipmentStop switch Muffler Cutting attachment guardVibration damping system Cutting equipment Cutting equipmentLocking nut Trimmer head Sharpening grass cutters and grass bladesFitting the J-handle AssemblyFitting the loop handle Fitting the trimmer guard and Auto 32 trimmer head AssemblyAssembling and dismantling the two-piece shaft Assembling the cutting equipmentFitting other guards and cutting attachments Guard Fitting the trimmer guard and trimmer headFuel Fuel safetyFuel Handling Mixing FuelingStarting Starting and StoppingCheck before starting Starting and stoppingStopping Basic working techniques Basic safety rulesWorking Techniques General working instructionsGrass trimming with a trimmer head Grass clearing using a grass bladeSweeping Carburetor MaintenanceHigh speed jet H Fine adjustment of the idle speed TCorrectly adjusted carburetor MufflerSpark plug Cleaning the air filterCooling system Air filterBevel gear Two-piece shaftMaintenance Daily Weekly Monthly Maintenance scheduleTechnical data Technical DataPowerhead model Accessories Art No Your Warranty Rights and Obligations Federal Emission Control Warranty StatementTap-N-Go Trimmy H S35 095-.106 ´z+R3¶5y¨ Auto 1150271-95 ´z+R3¶5y¨ ´z+R3¶5y¨

GC 2125, GC 2125C specifications

The Jonsered GC 2125C and GC 2125 are exceptional gardening tools engineered to meet the diverse needs of both professionals and hobbyists in lawn care and garden maintenance. These two models stand out for their reliability, versatility, and performance, making them popular choices among garden enthusiasts.

One of the main features of the Jonsered GC 2125C and GC 2125 is their powerful engine. Equipped with high-performance two-stroke engines, these models deliver outstanding power and durability, ensuring efficient operation for a variety of tasks, from lawn mowing to trimming overgrown areas. The engines are designed for low fuel consumption and reduced emissions, making them environmentally friendly options.

Both models present a user-friendly design that prioritizes comfort and ease of use. The ergonomic handle provides a comfortable grip and minimizes vibration, allowing for extended use without causing fatigue. The adjustable handle height accommodates users of different sizes, ensuring that everyone can work comfortably.

One key technological advancement incorporated into the Jonsered GC 2125C and GC 2125 is the Smart Start feature. This technology makes starting the engine a straightforward process, requiring less effort from the user. With a simple pull of the starter cord, the engine fires up quickly, which is especially beneficial for those who may struggle with traditional starting mechanisms.

The cutting system in both models features a durable and efficient blade design, coupled with adjustable cutting heights. This adaptability makes it easy to achieve a clean and precise cut, whether tackling thick grass or delicate flowers. The GC 2125C comes with added functionalities, offering users versatility in trimming and mowing with its innovative cutting deck.

Maintenance is made simple with both models; Jonsered prioritizes easy access to crucial engine components, allowing for quick checks and repairs. This commitment to user-friendly maintenance extends to the air filter and spark plug, which can be reached without specialized tools.

In summary, the Jonsered GC 2125C and GC 2125 are robust gardening tools that combine powerful performance, user-centric design, and innovative technologies. Whether used by professionals or gardening enthusiasts, these models excel at delivering efficient, reliable, and environmentally conscious performance for all outdoor maintenance needs.