Jonsered GC 2125C manual Maintenance, Carburetor

Page 22

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.

22 – English

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Contents Operator’s manual EPA KEY to Symbols SymbolsContents Introduction Dear customerWhat is what? What is WHAT?GC2125C General Safety Precautions Personal protective equipmentStop switch Machine′s safety equipmentThrottle lockout Vibration damping system Cutting attachment guardMuffler Locking nut Cutting equipmentCutting equipment Sharpening grass cutters and grass blades Trimmer headFitting the loop handle AssemblyFitting the J-handle Assembling the cutting equipment AssemblyAssembling and dismantling the two-piece shaft Fitting the trimmer guard and Auto 32 trimmer headFitting other guards and cutting attachments Fitting the trimmer guard and trimmer head GuardFuel Handling Fuel safetyFuel Fueling MixingStarting and stopping Starting and StoppingCheck before starting StartingStopping General working instructions Basic safety rulesWorking Techniques Basic working techniquesGrass clearing using a grass blade Grass trimming with a trimmer headSweeping Maintenance CarburetorMuffler Fine adjustment of the idle speed TCorrectly adjusted carburetor High speed jet HAir filter Cleaning the air filterCooling system Spark plugTwo-piece shaft Bevel gearMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical dataPowerhead model Accessories Art No Federal Emission Control Warranty Statement Your Warranty Rights and ObligationsTap-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.
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