Husqvarna 325HS75X-Series manual Maintenance, Carburettor

Page 16

MAINTENANCE

Carburettor

Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. After the engine has used 8-10 tanks of fuel the engine will be run-in.To ensure that it continues to run at peak performance and to minimise harmful exhaust emissions after the running-in period, ask your dealer/service workshop (who will have a rev counter at their disposal) to adjust your carburettor.

WARNING! The complete clutch cover and

!gear housing must be fitted before the machine is started, otherwise the clutch may come loose and cause personal injury.

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.

•The carburettor has three adjustment controls: L = Low speed jet

H = High speed jet

T = Idle adjustment screw

L H T

•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 carburettor 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 blades move while the engine is idling the T screw should be turned anti-clockwise until they stop.

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 carburettor 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 blades move while the engine is idling the T screw should be turned anti-clockwise until they stop.

Low speed jet L

Try to find the highest idle speed by turning the low speed jet L clockwise then anti-clockwise. When the highest speed has been found, turn the low speed jet L 1/4 turn anti-clockwise.

L

+ 1/4

L

CAUTION! If the blades move while the engine is idling the T screw should be turned anti-clockwise until they stop.

16 – English

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Contents 325HS75X-series 325HS99X-series KEY to Symbols SymbolsContents Introduction Dear CustomerWhat is WHAT? What is what?General Safety Precautions Personal protective equipmentStop switch Machine′s safety equipmentThrottle lock Vibration damping system Hand guardMuffler Assembly of the catcher accessory Gear housingBlades Fuel Handling Fuel safetyFuel Fuelling MixingStarting and Stopping Check before startingStarting and stopping Cold engineStarting StoppingSafety instructions regarding the surroundings Safety instructions while workingWorking Techniques General working instructionsSafety instructions after completing work Basic working techniquesMaintenance CarburettorFine adjustment of the idle speed T Correctly adjusted carburettorMuffler High speed jet HCleaning the air filter Cooling systemSpark plug Air filterGear housing Cleaning and lubricationMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical dataEC-declaration of conformity Applies to Europe only Cispr 121997, EN774Page 1150089-26 ´z+R¶6¨ ´z+R¶6¨

325HS75X-Series specifications

The Husqvarna 325HS75X-Series is an innovative hedge trimmer designed for professionals and garden enthusiasts alike. This powerful tool excels in both performance and ergonomics, making it a top choice for those requiring a reliable solution for maintaining hedges and shrubs.

One of the standout features of the Husqvarna 325HS75X is its robust engine. Equipped with a 25cc, 2-stroke engine, this trimmer delivers high performance while ensuring fuel efficiency. With a power output of 1.1 kW, it provides enough strength to handle dense hedges and thick vegetation while minimizing operator fatigue during extended use.

The design of the 325HS75X emphasizes ease of handling. The lightweight construction, combined with an ergonomic handle, allows for easy maneuvering even in challenging positions. The adjustable rear handle further enhances comfort and control, making it ideal for vertical and horizontal trimming tasks.

In terms of cutting capability, the Husqvarna 325HS75X features dual reciprocating blades, measuring 75 cm (about 29.5 inches) in length. These sharp, precision-cut blades enable smooth and efficient cutting, allowing users to achieve clean and professional-looking results. The 32 mm tooth spacing is designed to handle a variety of branches, enhancing its versatility and making it suitable for different pruning tasks.

The trimmer also incorporates advanced technologies to improve its performance and ease of use. One such feature is the LowVib system, which significantly reduces vibrations during operation, enhancing user comfort and reducing fatigue. Additionally, the Easy Start feature makes starting the engine effortless, allowing users to focus more on the task at hand rather than wrestling with cumbersome starting procedures.

Safety is a crucial consideration in the design of the 325HS75X. The trimmer is equipped with durable guards and safety features that protect the operator from debris. Furthermore, its robust construction ensures longevity, making it a wise investment for anyone who requires a reliable hedge trimming solution.

In conclusion, the Husqvarna 325HS75X-Series is built for efficiency, comfort, and safety. Its powerful engine, precision blades, and ergonomic design make it an exceptional choice for tackling a variety of hedge trimming tasks, ultimately helping users achieve a well-maintained landscape with ease. Whether you are a professional landscaper or a homeowner looking to maintain your garden, the 325HS75X delivers the performance and reliability you need to get the job done effectively.
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