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MAINTENANCE

16 – English

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.

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

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 blades move while the engine is idling 

the T screw should be turned anti-clockwise until they 
stop.

Rec. idle speed:

 2700 rpm

Recommended max. speed:

 See the Technical data 

section.

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 blades move while the engine is idling 

the T screw should be turned anti-clockwise until they 
stop.

!

WARNING! The complete clutch cover 
and gear housing must be fitted before 
the machine is started, otherwise the 
clutch may come loose and cause 
personal injury.

!

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.

Содержание 326HD60X series

Страница 1: ...En n n ng g g gl l l li i i is s s sh h h h 326HD60X series 326HD75X series Operator s manual Please read the operator s manual carefully and make sure you understand the instructions before using the machine ...

Страница 2: ...ctive gloves Wear sturdy non slip boots or shoes Noise emission to the environment according to the European Community s Directive The machine s emission is specified in chapter Technical data and on label Other symbols decals on the machine refer to special certification requirements for certain markets The engine is switched off by moving the stop switch to the stop position CAUTION The stop swi...

Страница 3: ...ling system 18 Spark plug 19 Air filter 19 Gear housing 20 Cleaning and lubrication 20 Maintenance schedule 21 TECHNICAL DATA Technical data 22 WARNING Long term exposure to noise can result in permanent hearing impairment So always use approved hearing protection WARNING Under no circumstances may the design of the machine be modified without the permission of the manufacturer Always use genuine ...

Страница 4: ...dustry Husqvarna s aim is also to be in the front edge according to ergonomics usability security and environmental protection That is the reason why we have developed many different features to provide our products within these areas We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very long time to come The purchase of one of our ...

Страница 5: ...ont handle 7 Cylinder cover 8 Starter handle 9 Stop switch 10 Throttle lock 11 Adjustable handle 12 Throttle control 13 Lock for handle 14 Fuel tank 15 Fuel cap 16 Air purge 17 Choke control 18 Air filter cover 19 Hand guard 20 Tube of grease 21 Allen key 22 Combination spanner 23 Transport guard 24 Spark plug cap and spark plug ...

Страница 6: ...k of electric shock WARNING The ignition system of this machine produces an electromagnetic field during operation This field may under some circumstances interfere with pacemakers To reduce the risk of serious or fatal injury we recommend persons with pacemakers to consult their physician and the pacemaker manufacturer before operating this machine WARNING Running an engine in a confined or badly...

Страница 7: ...turn springs This arrangement means that the throttle control is automatically locked at the idle setting Make sure the throttle control is locked at the idle setting when the throttle lockout is released Press the throttle lockout and make sure it returns to its original position when you release it Check that the throttle control and throttle lockout move freely and that the return springs work ...

Страница 8: ...heck that the vibration damping element is undamaged and securely attached Muffler The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user A muffler fitted with a catalytic converter is also designed to reduce harmful exhaust gases In countries that have a warm and dry climate there is a significant risk of fire We therefore fit certain mufflers wit...

Страница 9: ...e edges of the blades are too hard to be filed Dull blades should be sharpened using a grinder Replace the blades if they are bent or damaged Blade guard The blade guard A is intended to protect against any part of the body coming into contact with the blades B Check that the blade guard is not damaged or distorted Replace the blade guard if it is bent or damaged Gear housing The gear housing gets...

Страница 10: ...rrect mixture is obtained When mixing small amounts of fuel even small inaccuracies can drastically affect the ratio of the mixture Petrol CAUTION Always use a quality petrol oil mixture at least 90 octane RON If your machine is equipped with a catalytic converter see chapter onTechnical data always use a good quality unleaded petrol oil mixture Leaded petrol will destroy the catalytic converter U...

Страница 11: ... Contamination in the tank can cause operating problems Ensure that the fuel is well mixed by shaking the container before filling the tank WARNING The catalytic converter muffler gets very hot during and after use This also applies during idling Be aware of the fire hazard especially when working near flammable substances and or vapours WARNING Taking the following precautions will lessen the ris...

Страница 12: ...de its specifications All covers must be correctly fitted and undamaged before you start the machine Starting and stopping Cold engine Primer bulb Press the air purge repeatedly until fuel begins to fill the bulb The bulb need not be completely filled Choke Set the choke control in the choke position WARNING The complete clutch cover and gear housing must be fitted before the machine is started ot...

Страница 13: ...ully pull the cord Push the choke control back to its original position as soon as the engine fires and continue trying to start until the engine starts CAUTION Do not pull the starter cord all the way out and do not let go of the starter handle when the cord is fully extended This can damage the machine Stopping The engine is switched off by moving the stop switch to the stop position CAUTION The...

Страница 14: ...ured Keep in mind that the operator is responsible for accidents or hazards occuring to other people or their property Safety instructions while working Always ensure you have a safe and stable working position Always use both hands to hold the machine Hold the machine in front of your body Make sure that your hands and feet do not come near the cutting attachment when the engine is running IMPORT...

Страница 15: ... fitted to the cutting attachment when the machine is not in use Make sure the cutting attachment has stopped before cleaning carrying out repairs or an inspection Disconnect the HT lead from the spark plug Always wear heavy duty gloves when repairing the cutting attachment This is extremely sharp and can easily cause cuts Store the machine out of reach of children Use only original spare parts fo...

Страница 16: ...djusted 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 Rec idle speed ...

Страница 17: ...ttachment stops contact your dealer service workshop Do not use the machine until it has been correctly adjusted or repaired High speed jet H The high speed jet H affects the engine power speed temperature and fuel consumption If the high speed jet H is set too lean screwed in too far the engine speed will be too high and cause engine damage Do not let the engine run at full speed for more than 10...

Страница 18: ...at least once a week This is best done with a wire brush On mufflers without a catalytic converter the mesh should be cleaned weekly or replaced if necessary On mufflers fitted with a catalytic converter the mesh should be checked and if necessary cleaned monthly If the mesh is damaged it should be replaced If the mesh is frequently blocked this can be a sign that the performance of the catalytic ...

Страница 19: ...ar to engine parts Excessive fuel consumption Clean the filter every 25 hours or more regularly if conditions are exceptionally dusty Cleaning the air filter Remove the air filter cover and take out the filter Wash it clean in warm soapy water Ensure that the filter is dry before refitting it An air filter that has been in use for a long time cannot be cleaned completely The filter must therefore ...

Страница 20: ... grease expands as the machine heats up during operation If the gear housing was completely filled with grease it could damage the seals and lead to leakage of grease The grease in the bevel gear does not normally need to be changed except if repairs are carried out Cleaning and lubrication Clean any resin and plant residue from the blades using cleaning agent 531 00 75 13 UL22 before and after us...

Страница 21: ... there are no fuel leaks from the engine tank or fuel lines X Check the starter and starter cord X Check that the vibration damping elements are not damaged X Clean the outside of the spark plug Remove it and check the electrode gap Adjust the gap to 0 5 mm or replace the spark plug Check that the spark plug is fitted with a suppressor X Clean the machine s cooling system X Clean or replace the sp...

Страница 22: ...Speed regulated ignition system Yes Yes Ignition system Manufacturer type of ignition system Walbro MB Walbro MB Spark plug Champion RCJ 6Y Champion RCJ 6Y Electrode gap mm 0 02 0 5 0 02 0 5 Fuel and lubrication system Manufacturer type of carburettor Zama C1Q Zama C1Q Fuel tank capacity litre 1 0 0 5 1 0 0 5 Weight Weight without fuel kg 5 7 6 0 Noise levels see note 1 Equivalent noise pressure l...

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Страница 28: ...1151110 26 z S 66 z S 66 2008 03 11 ...

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