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.

English – 19

Page 18 Page 20
Page 19
Image 19
Husqvarna 333RJ, 335RJX-Series manual Maintenance, Carburetor
Page 18 Page 20

333RJ, 335RJX-Series, 333RJ specifications

The Husqvarna 335RJx and 333RJ are powerful and versatile string trimmers designed for both professionals and passionate homeowners. These models boast impressive features and cutting-edge technologies that enable users to handle even the toughest grass and weeds with ease.

One of the standout features of the Husqvarna 335RJx and 333RJ is their lightweight design. Weighing in at just over 10 pounds, these trimmers are easy to maneuver, reducing user fatigue during extended use. The ergonomic handle design provides comfort and control, allowing for precise trimming in tight spaces and around obstacles without strain.

Equipped with a high-performance X-Torq engine, these models deliver superior power and fuel efficiency. This technology reduces harmful emissions, making them environmentally friendly while maintaining impressive performance. The engines are designed to provide more torque at low RPM, enhancing cutting efficiency and enabling users to tackle thicker vegetation without compromising speed.

Both models feature Husqvarna's Auto Return Stop Switch, which simplifies the starting process. The stop switch automatically returns to the ON position, ensuring that the trimmer is ready to go with minimal effort. This design reduces downtime and increases productivity, making the user experience more efficient.

The cutting equipment on the Husqvarna 335RJx and 333RJ is equally impressive. These trimmers come with a high-capacity trimmer head that allows for quick line replacement. The tap-and-go feature permits users to extend the line effortlessly by tapping the head on the ground, enhancing practicality during operation. Furthermore, the cutting width of 18 inches ensures that users can cover a large area in a shorter amount of time.

Durability is a key characteristic of these models. Constructed with high-quality materials, the trimmers are built to withstand rigorous usage, ensuring longevity and reliable performance. The double shoulder harness further distributes the weight evenly, providing additional support during operation and allowing for greater control while trimming.

In conclusion, the Husqvarna 335RJx and 333RJ offer a combination of power, efficiency, and user-friendly design. With their advanced engine technology, comfortable handling, and practical features, these string trimmers are ideal for anyone looking to maintain their landscape with ease and precision. Whether for professional landscaping or home gardening, these models stand out in delivering performance and reliability.
Top Page Image Contents