Husqvarna 123LD, 123C manual Maintenance, Carburettor

Page 18

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.

•The setting of the carburetor means that the engine is adepted to local conditions, for example, the climate, altitude, fuel 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

•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 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 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.

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.

+ 1/4

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 123C 123L 123LD KEY to Symbols SymbolsContents Safety Instructions Machine′s safety equipmentPersonal protective equipment Cutting equipment Vibration damping systemMuffler Locking nutSafety Instructions Cutting equipment Trimmer headStarting General safety precautionsFuel safety Transport and storageGeneral working instructions Basic safety rulesGrass trimming using a trimmer head and plastic blades Basic working techniquesCutting What is WHAT? What is what?Assembling and dismantling the two-piece shaft AssemblyFitting the loop handle Fitting the trimmer guard and trimmer headGuard 123CGasoline Fuel HandlingFuel Two-stroke oilFuelling Starting and stopping Starting and StoppingCheck before starting Cold engineWarm engine StoppingMaintenance CarburettorMuffler Fine adjustment of the idle speed TCorrectly adjusted carburettor High speed jet HTwo-piece shaft Cooling systemSpark plug Air filterWeekly maintenance Maintenance scheduleDaily maintenance Monthly maintenanceTechnical Data Technical dataAttachments Art No Use with Federal Emission Control Warranty Statement Your Warranty Rights and Obligations095-.106 15 cm Clic´z+H6G¶5I¨ 1140223-95
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123C, 123LD, 123L specifications

The Husqvarna 123L is a lightweight and efficient trimmer designed for homeowners and garden enthusiasts seeking a reliable tool for trimming grass and managing tough weeds. It combines power, usability, and innovativeness, making it an ideal choice for maintaining residential landscapes.

At the heart of the Husqvarna 123L is a powerful 28cc two-stroke engine that delivers impressive performance while remaining lightweight. This engine is designed for optimal fuel efficiency, enabling users to work longer without frequent refueling. The low-emission technology incorporated into the engine ensures that it meets strict environmental standards, reducing the impact on the surrounding ecosystem.

One of the standout features of the Husqvarna 123L is its Smart Start technology. This innovation simplifies the starting process, allowing users to start the trimmer with minimal effort. The engine is designed to reduce resistance in the starter cord, enabling an easier pull every time. This attribute is particularly useful for those unfamiliar with small engine operation or for users who may have physical limitations.

The trimmer's ergonomically designed handle contributes to its comfort and usability. The adjustable handle allows for customization to fit the user's height and preferred operation angle, which reduces fatigue during extended use. Additionally, the trimmer features a lightweight construction, making it easy to maneuver around gardens and landscapes.

Another impressive characteristic of the Husqvarna 123L is its efficient cutting system. It comes equipped with a 0.080-inch cutting line, which provides a clean cut while ensuring durability for improved longevity. The trimmer head allows for easy line replacement, enabling users to quickly resume work without wasting time on complicated maintenance.

Moreover, the Husqvarna 123L is equipped with a heavy-duty, durable casing, ensuring that it withstands tough working conditions while providing consistent performance. The built-in air filter reduces contamination and prolongs the life of the engine, ensuring reliability with every use.

In summary, the Husqvarna 123L is an ideal choice for homeowners who need a powerful yet manageable trimmer. With its effective 28cc engine, Smart Start technology, ergonomic design, and efficient cutting system, this trimmer proves to be a valuable addition to any garden tool collection. Its commitment to power, comfort, and innovation allows users to maintain their landscapes effortlessly.
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