Husqvarna 335LS manual Maintenance, Carburetor

Page 18

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

! 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

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 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: See the Technical data section.

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.

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.

18 – English

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Contents 335LS 335LX-series KEY to Symbols SymbolsContents Introduction Dear customerWhat is WHAT? What is what on the clearing saw?General Safety Precautions Personal protective equipmentMachine′s safety equipment Throttle lockoutStop switch Cutting attachment guardVibration damping system Muffler Cutting equipment Trimmer headIncrease the risk of accidents Assembly Fitting the loop handleAssembling the cutting equipment Fuel safety Fuel HandlingFuel Fueling MixingStarting and stopping Starting and StoppingCheck before starting StartingStopping Basic safety rules Working TechniquesGeneral working instructions Basic working techniques Grass trimming with a trimmer headMaintenance CarburetorMuffler Fine adjustment of the idle speed TCorrectly adjusted carburetor High speed jet HCooling system Bevel gearAir filter Oiling the air filter Cleaning the air filterSpark plug Must always be replacedMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical dataYour Warranty Rights and Obligations Emission Warranty Parts List Page S35 25 m T35, T35x T45, T45x Page Page Page Page Page 1151411-95
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335LS specifications

The Husqvarna 335LS is a versatile and robust string trimmer designed for both professional landscapers and avid gardeners. This machine combines power, efficiency, and user-friendly features, making it an ideal choice for tackling a variety of trimming tasks around the home or on larger job sites.

One of the standout features of the Husqvarna 335LS is its powerful engine. Equipped with a 34.6cc, 2-stroke engine, it delivers high torque over a wide RPM range. This means that users can expect impressive performance while maintaining fuel efficiency, which is crucial for long working hours. The inclusion of the X-Torq technology not only enhances fuel efficiency but also reduces harmful emissions, aligning with today’s environmental standards.

The cutting equipment on the 335LS is designed to handle different types of vegetation effortlessly. It comes with a Tap 'N Go trimmer head that allows for easy line feeding, ensuring continuous operation without interruptions. This feature is particularly beneficial when dealing with thick grass or weeds, as users can quickly extend the cutting line as needed.

Another significant characteristic of the Husqvarna 335LS is its lightweight design. Weighing just under 12 pounds, it is easy to maneuver without causing fatigue. The ergonomically designed handle provides a comfortable grip, which allows for extended use without discomfort. Additionally, the adjustable handle helps users find their ideal working position, further enhancing comfort and control.

The machine is also equipped with a smart start function, which reduces the resistance in the starter cord, allowing for easier ignition. This is particularly useful for users who may struggle with traditional starting systems, making the 335LS accessible to a wider audience.

Durability is another key aspect of the Husqvarna 335LS. It features high-quality materials and components designed to withstand the rigors of regular use. This reliability is further bolstered by features such as the heavy-duty gear head and sturdy construction.

In conclusion, the Husqvarna 335LS is designed with innovation and user-friendliness in mind. Its powerful engine, advanced technologies, lightweight design, and ease of use make it an excellent choice for anyone looking to maintain their lawn or complete landscaping tasks. Whether you are a professional or a homeowner, this string trimmer promises exceptional performance and long-lasting service.
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