Maintenance, Carburetor, Mufﬂer | Husqvarna 327HE4, 327HE3, 327HDA65

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.

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

•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.

Adjustment of the idle speed

Before any adjustments are made, make sure that the air ﬁlter is clean and the air ﬁlter cover is ﬁtted.

Adjust the idle speed with the idle adjustment screw T, if adjustment is necessary. First turn the idle adjustment screw T clockwise until the blades start to move. Then turn the idle adjustment screw T anticlockwise until the blades stop. The idle speed is correctly adjusted when the engine runs smoothly in every position. There should also be a clear margin to the speed at which the blades start to move.

The blades must also remain stationary when the choke control is in the start throttle position.

Rec. idle 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.

Mufﬂer

CAUTION! Some mufﬂers are ﬁtted with a catalytic converter. See chapter on Technical data to see whether your machine is ﬁtted with a catalytic converter.

The mufﬂer is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may

20 – English

327HE4, 327HDA65, 327HE3 specifications

Husqvarna is a well-known brand that has consistently delivered high-quality outdoor power equipment. Among its impressive lineup are the Husqvarna 327HDA65, 327HE4, and 327HE3, which are designed for professional use in maintaining landscapes. These handheld hedge trimmers are equipped with advanced features and technologies that make them stand out in a competitive market.

The Husqvarna 327HDA65 is a robust hedge trimmer designed for heavy-duty use. It features a powerful 25cc engine that provides excellent performance without sacrificing fuel efficiency. The dual-action blades are engineered for precision cutting, and with a cutting length of 65 cm, they can handle a variety of hedge sizes and shapes. The trimmer also incorporates an anti-vibration system, which reduces operator fatigue during extended use. Additionally, the adjustable rear handle allows for comfortable operation in various cutting positions.

The Husqvarna 327HE4 is another great option, built with a focus on versatility and ease of use. This model is equipped with a split shaft design, enabling easy transport and storage without compromising on performance. The 327HE4 uses a powerful 25cc engine similar to the 327HDA65 and features a high-efficiency cutting system with laser-cut and hardened blades for a smoother cutting experience. Its unique design allows for greater maneuverability, making it ideal for intricate trimming tasks. The anti-vibration technology further enhances comfort during prolonged work sessions.

Lastly, the Husqvarna 327HE3 offers compactness and functionality. This model is designed for homeowners and professionals alike who need a lighter tool without sacrificing performance. It features a lightweight design combined with a powerful engine, offering an excellent power-to-weight ratio. The shorter length of its cutting blade makes it perfect for delicate work, while its low noise levels ensure that users can work early in the morning or late into the evening without disturbing the neighborhood.

All three models come equipped with advanced technologies, including the Smart Start system for easy engine starting, making them user-friendly for both novice and experienced operators. Safety features such as the throttle lock ensure secure operation, while the ergonomic design reduces strain during use. The Husqvarna 327HDA65, 327HE4, and 327HE3 are exemplary choices for those looking to invest in reliable, high-performance hedge trimmers that combine innovation, comfort, and cutting efficiency for pristine landscape maintenance.