Husqvarna 323HD60, 325HD60X-Series, 325HD75X-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

•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.

+ 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 323HD60 325HD60X-series KEY to Symbols SymbolsContents Introduction Dear CustomerWhat is WHAT? What is what?General Safety Precautions Personal protective equipmentMachine′s safety equipment Stop switchThrottle lock Hand guardVibration damping system MufflerBlades Gear housingBlade guard 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 instructionsBasic working techniques Safety instructions after completing work325HD60, 325HD75 Maintenance 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 1150087-26 ´z+Rh¶6+¨ ´z+Rh¶6+¨

323HD60, 325HD60X-Series, 325HD75X-Series specifications

The Husqvarna 323HD60, 325HD60X-Series, and 325HD75X-Series are cutting-edge hedge trimmers designed for professional landscapers and gardening enthusiasts alike. These powerful tools combine innovative technology with ergonomic design, making them efficient and comfortable to use for extended periods.

The Husqvarna 323HD60 is equipped with a robust 21.7 cc, 2-stroke engine, providing the power needed to tackle tough hedges. Its professional-grade build includes a dual-action blade that features hardened steel for improved durability and cutting efficiency. The cutting length of 60 cm allows users to manage taller hedges with ease, while the 28 mm tooth spacing ensures precise cutting even through larger branches.

Moving on to the 325HD60X-Series, this model enhances the user experience with an increased cutting length of 60 cm and an impressive 25.4 cc engine that offers higher performance. This series also introduces an advanced cooling system designed to extend engine life during demanding tasks. The user-friendly starting system minimizes effort, making these hedge trimmers accessible for all skill levels. Additionally, the 325HD60X features vibration dampening technology that significantly reduces fatigue, allowing for longer work sessions without discomfort.

For those requiring even more power, the 325HD75X-Series rises to the occasion. Featuring a powerful 25.4 cc engine and a longer 75 cm cutting blade, this model is perfect for larger hedges or intricate topiary work. The design includes an adjustable rear handle that allows for easy maneuvering and optimal control, making it suitable for both vertical and horizontal cuts. The dual-reciprocating cutting blades provide clean cuts and minimize the risk of damage to plants, leading to healthier growth.

Both the 325HD60X and 325HD75X-Series models incorporate Air Injection technology, which helps boost performance by keeping the air filter cleaner for longer periods. This results in reduced maintenance and extended intervals between servicing. Moreover, the intelligent design features a sturdy carrying strap, ensuring comfort during operation.

In summary, Husqvarna's 323HD60, 325HD60X-Series, and 325HD75X-Series hedge trimmers exemplify a blend of power, precision, and comfort. With advanced features like dual-action blades, vibration dampening, and efficient cooling systems, these tools are built for the demanding tasks faced by professionals and provide exceptional results in any landscaping project.
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