Husqvarna 26HS75 manual Maintenance, Carburetor

Page 16

MAINTENANCE

Carburetor

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 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

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 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 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 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 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 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.

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 326HS75X-series 326HS99X-series KEY to Symbols SymbolsContents Introduction Dear customerWhat is WHAT? What is what?General Safety Precautions Personal protective equipmentStop switch Machine′s safety equipmentThrottle lockout Vibration damping system Hand guardMuffler Assembly of the catcher accessory Gear housingBlades Fuel Handling Fuel safetyFuel Fueling 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 CarburetorFine adjustment of the idle speed T Correctly adjusted carburetorMuffler High speed jet HCleaning the air filter Cooling systemSpark plug Air filterGear housing Cleaning and lubricationMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical data´z+RDy¶5G¨ 22 English´z+RDy¶5G¨ Federal and California Emissions Control Warranty Statement 1150368-95 ´z+RDy¶5G¨ ´z+RDy¶5G¨

26HS75 specifications

The Husqvarna 26HS75 is a powerful and efficient hedge trimmer designed for both professional landscapers and avid gardeners. Known for its durability and stellar performance, it captures the essence of Husqvarna's commitment to delivering high-quality outdoor equipment.

One of the standout features of the Husqvarna 26HS75 is its robust engine. Powered by a reliable two-stroke engine, it provides enough power to tackle even the densest hedges with ease. The engine is designed for optimal fuel efficiency, reducing the need for frequent refueling and minimizing the environmental impact.

The cutting system of the 26HS75 is impressive, featuring a double-sided blade that can handle various trimming angles. With a blade length of 75 cm, it allows users to trim large hedges quickly while ensuring precision and cleanliness in cuts. The teeth spacing is engineered to handle both small twigs and thicker branches, making it versatile for different types of shrubs and hedges.

Comfort and usability are paramount in the design of the Husqvarna 26HS75. It boasts an ergonomic handle that reduces strain during extended use, ensuring that users can work for longer periods without discomfort. The innovative anti-vibration technology significantly minimizes vibrations transferred to the operator's hands, allowing for greater control and reducing fatigue.

Another feature that sets this hedge trimmer apart is its easy-start mechanism. Designed to simplify the starting process, this technology ensures that users can get to work quickly without the frustration often associated with starting small engines. Combined with a lightweight design, the 26HS75 is easy to maneuver, making it ideal for both intricate shaping and broader trimming tasks.

Safety is also a crucial aspect of the Husqvarna 26HS75. It comes equipped with a blade brake system that quickly stops the blade movement, minimizing the risk of accidents. Additionally, the transparent fuel tank allows users to easily monitor fuel levels, preventing unexpected downtime during work.

In conclusion, the Husqvarna 26HS75 is a top-tier hedge trimmer that combines power, efficiency, and user comfort. With its innovative features and sturdy construction, it is an excellent choice for anyone looking to maintain their garden or landscape with precision and ease. Husqvarna continues to set the benchmark for quality in outdoor equipment, making the 26HS75 a solid investment for garden care enthusiasts and professionals alike.
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