Husqvarna 333R-Series manual Maintenance, Carburettor

Page 24

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

!shaft must be fitted before the machine is started, otherwise the clutch can 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 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 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 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 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

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.

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Contents 333R 335RX-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 Stop switchThrottle lock Cutting attachment guard Vibration damping systemQuick release MufflerLocking nut Cutting equipment Cutting equipmentSharpening grass cutters and grass blades Sharpening the saw blade Trimmer headAssembly Assembling the handlebar and throttleAssembling the cutting equipment Fitting the guard extensionFitting a blade guard, grass blade and grass cutter Fitting the blade guard and saw bladeAdjusting the harness and clearing saw Fitting other guards and cutting attachmentsStandard harness Spreading the load on your shouldersAdjusting the harness Triobalance harnessCorrect balance Fuel safety Fuel HandlingFuel Fuelling MixingStarting and Stopping Check before startingStarting and stopping StartingFor throttle handles with a start throttle lock StoppingBasic safety rules Working TechniquesGeneral working instructions ABC of clearingForestry clearing using a saw blade Working methodsGrass clearing using a grass blade Brush cutting with a saw bladeGrass trimming with a trimmer head Clearing Maintenance CarburettorFine adjustment of the idle speed T Correctly adjusted carburettorAdjusting the start throttle speed High speed jet HMuffler Cooling systemBevel gear Cleaning the air filter Air filterSpark plug Oiling the air filterMaintenance schedule Maintenance Daily Weekly MonthlyTechnical Data Technical dataEC-declaration of conformity Applies to Europe onlyPage S35 095-.106 T35 T45 Auto Trimmy SII ´z+R56¶6u¨ Page 1150212-26 ´z+R56¶6u¨ ´z+R56¶6u¨

333R-Series specifications

The Husqvarna 333R-Series represents a pinnacle of engineering in the realm of professional-grade brushcutters. Designed for heavy-duty performance, the 333R is an ideal choice for landscape professionals and homeowners alike, providing an efficient solution for tackling thick grass, weeds, and brush. Its robust construction and advanced features make it a reliable tool in various trimming and clearing applications.

One of the standout characteristics of the 333R-Series is its powerful engine. Equipped with a high-performance 32.6 cc, 2-stroke engine, it delivers exceptional torque and speed, enabling users to cut through dense undergrowth with ease. The engine is designed with Husqvarna's X-Torq technology, which optimizes fuel efficiency by reducing fuel consumption and emissions. This not only benefits the environment but also allows for longer operating times between refuels, a crucial factor for professional landscapers working long hours.

The ergonomics of the 333R-Series enhance user experience significantly. Its lightweight design, combined with a balanced frame, reduces fatigue during prolonged use. The comfortable shoulder harness ensures that the weight of the tool is evenly distributed, allowing for easier maneuverability without sacrificing power. Additionally, the adjustable handlebar provides customizable grip positions, ensuring comfort for users of all sizes.

The cutting equipment of the Husqvarna 333R-Series is another critical feature that sets it apart. It comes with a unique twin line cutting system that uses a high-capacity trimmer head, enabling swift and precise cutting. The ability to quickly swap between trimming heads, including blades for heavier brush, adds versatility to the tool, catering to varying job requirements.

Husqvarna has also integrated advanced anti-vibration technology into the 333R-Series, which minimizes hand and arm strain during operation. This feature enhances overall user comfort, allowing operators to work longer while reducing the risk of fatigue-related injuries.

Moreover, the 333R-Series boasts a tool-less air filter access, simplifying maintenance and increasing uptime. With a robust build and reliable technology, users can trust that this brushcutter will withstand demanding conditions and deliver consistent performance over time.

In summary, the Husqvarna 333R-Series is a powerful, efficient, and ergonomically designed brushcutter that meets the challenges faced by landscaping professionals and avid garden enthusiasts. Its blend of performance, comfort, and ease of maintenance makes it a preferred choice for anyone looking to maintain their outdoor spaces effectively.
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