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MAINTENANCE

16 – English

Air intake screen

Check that the air intake is not blocked on all sides 
including the underside, for example, by leaves or 
rubbish. A clogged air intake reduces the machine’s 
blowing capacity and increases the engine’s working 
temperature, which can result in engine failure. Stop the 
engine and remove the object.

Spark plug

The spark plug condition is influenced by:

Incorrect carburettor adjustment.

An incorrect fuel mixture (too much or incorrect type 
of oil).

A dirty air filter.

These factors cause deposits on the spark plug 
electrodes, which may result in operating problems and 
starting difficulties.

Clean the outside of the spark plug. Remove it and check 
the electrode gap. Adjust the gap to 0,6-0,7 mm or 
replace the spark plug. Check that the spark plug is fitted 
with a suppressor.

CAUTION! Always use the recommended spark plug 
type! Use of the wrong spark plug can damage the piston/
cylinder. Replace the plug twice a year.

Air filter

The air filter must be regularly cleaned to remove dust 
and dirt in order to avoid:

Carburettor malfunctions

Starting problems

Loss of engine power

Unnecessary wear to engine parts.

Excessive fuel consumption.

Check the air cleaner every 25 hours of use or nore 
frequently if used under dusty conditions.

 Avoid contact with hot surfaces on muffler, cylinder etc. 
Contact can result in burns to the skin.

Cleaning the air filter

1

Remove the air filter cover and air filter.

2

Use neutral detergent and warm water to clean the 
filter element. Ensure that the filter is dry before 
refitting it.  (1)

3

Install the air filter.

4

 Never forget to attach the screen. If the screen is not 
attached, the cleaner will not seal properly and the 
dusts come into the cylinder. (2)

An air filter that has been in use for a long time cannot be 
cleaned completely. The filter must therefore be replaced 
with a new one at regular intervals. 

A damaged air filter 

must always be replaced.

Refit the air filter and air filter cover.

!

WARNING! Never use the blower if the 
screen is not in place. Before use, check 
that the screen is in place and 
undamaged.

0,6-0,7

Summary of Contents for 425 BVS

Page 1: ...E E E En n n ng g g gl l l li i i is s s sh h h h 425 BVS Operator s manual Please read the operator s manual carefully and make sure you understand the instructions before using the machine ...

Page 2: ...f the impeller has stopped moving and the spark plug is disconnected The blower can forcibly throw objects that can bounce back This can result in serious eye injuries if the recommended safety equipment is not used The blower operator must ensure that no people or animals come closer than 15 metres When several operators are working at the same site a safety distance of at least 15 metres must be...

Page 3: ...9 ASSEMBLY Blow pipe 11 Installing support handle 11 FUEL HANDLING Fuel 12 Fueling 13 STARTING AND STOPPING Starting and stopping 14 MAINTENANCE General 15 Carburettor 15 Muffler 15 Cooling system 15 Air intake screen 16 Spark plug 16 Air filter 16 Fuel filter 17 Maintenance schedule 18 TECHNICAL DATA Technical data 19 WARNING Long term exposure to noise can result in permanent hearing impairment ...

Page 4: ...tion industry Husqvarna s aim is also to be at the front edge for ergonomics usability security and environmental protection That is the reason why we have developed many different features to add to 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 pro...

Page 5: ...op switch 2 Throttle trigger 3 Air intake screen 4 Spark plug 5 Starter handle 6 Air filter 7 Fuel tank 8 Round nozzle 9 Screw to the air inlet screen 10 Operator s manual 11 Combination spanner 12 Flat nozzle 13 Intermediate pipe 14 Extension pipe 15 Support handle 16 Screws ...

Page 6: ...ecification Never use a machine that is faulty Carry out the checks maintenance and service instructions described in this manual Some maintenance and service measures must be carried out by trained and qualified specialists See instructions under the Maintenance heading All covers and guards must be fitted before starting Ensure that the spark plug cap and ignition lead are undamaged to avoid the...

Page 7: ...ge your clothes Wash any part of your body that has come in contact with fuel Use soap and water If the machine is leaking fuel Check regularly for leaks from the fuel cap and fuel lines Transport and storage Store and transport the machine and fuel so that there is no risk of any leakage or fumes coming into contact with sparks or naked flames for example from electrical machinery electric motors...

Page 8: ...ection to locate where this equipment is positioned on your machine Stop switch Use the stop switch to switch off the engine Remove the ignition cable and the spark plug to carry out inspection and maintenance Muffler The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user In countries that have a warm and dry climate there is a significant risk of ...

Page 9: ...imple directions so that you disturb your surroundings as little as possible Use the blower with the lowest possible throttle It is seldom necessary to use full throttle and many work procedures can be done at half throttle A lower throttle means less noise and less dust and it is also easier to keep control over the rubbish collected together moved WARNING Bear in mind that Engine exhaust fumes c...

Page 10: ...u have it in clear sight Engine exhaust fumes contain carbon monoxide which can cause carbon monoxide poisoning For this reason you should not start or run the machine indoors or anywhere that is poorly ventilated The blower must not be used while on a ladder or scaffolding CAUTION Do not use the machine unless you are able to call for help in the event of an accident Basic working techniques The ...

Page 11: ...e Rotate the pipe clockwise to lock it into place Round nozzle 1 Round nozzle 2 Intermediate pipe 3 Flat nozzle 4 Extension pipe Flat nozzle When using a flat nozzle please use a extension pipe as needed Installing support handle This handle is supplied with the blower Fit the holes 2 of volute and handle 1 tighten the screws 3 Be sure to tighten the screws straightly 2 1 4 2 3 ...

Page 12: ...gine damage Two stroke oil For best results and performance use HUSQVARNA two stroke oil which is specially formulated for our two stroke engines Mixture 1 50 2 If HUSQVARNA two stroke oil is not available you may use another two stroke oil of good quality that is intended for air cooled engines Contact your dealer when selecting an oil Mixing ratio 1 33 3 Never use two stroke oil intended for wat...

Page 13: ...om oil and fuel Always store fuel in an approved container designed for that purpose WARNING Taking the following precautions will lessen the risk of fire Refuel in a well ventilated area Never fuel the machine indoors Do not smoke or place hot objects near fuel Always shut off the engine before refuelling Always stop the engine and let it cool for a few minutes before refuelling When refuelling o...

Page 14: ...old engine but without setting the choke control in the choke position If the engine won t start after several attempts close the choke and repeat pulling the rope or remove the spark plug and dry it Stop switch Move the throttle trigger to the idling position and press the stop switch red button until the engine comes to a complete stop WARNING Always move the machine away from the refuelling are...

Page 15: ...er Check regularly that the muffler is complete and secured correctly Tightening torque 7 10 Nm Clean the muffler After every 50 hours of use the muffler must be cleaned Remove the muffler insert a screwdriver into the vent and wipe away any carbon builup Wipe away any carbon buildup on the muffler exhaust vent and cylinder exhaust vent at the same time Make sure all nuts and bolts are tightened c...

Page 16: ...e a year Air filter The air filter must be regularly cleaned to remove dust and dirt in order to avoid Carburettor malfunctions Starting problems Loss of engine power Unnecessary wear to engine parts Excessive fuel consumption Check the air cleaner every 25 hours of use or nore frequently if used under dusty conditions Avoid contact with hot surfaces on muffler cylinder etc Contact can result in b...

Page 17: ...her defects Replace if necessary The fuel filter sits inside the fuel tank The filter can be taken out of the fueling port using a small wire hook Disconnect the filter assembly from the fuel pipe and unhook the retainer to disassemble it Clean the components with gasoline 1 Screen 2 Element 3 Holder 4 Retainer ...

Page 18: ...f necessary X Clean or replace the spark arrestor mesh on the muffler only applies to mufflers without a catalytic converter X Check that all sides of the air intake screen are not blocked 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 6 0 7 mm or replac...

Page 19: ...alent vibration level value is calculated with a work cycle of a duration of 1 7 for idling and 6 7 for racing Reported data for equivalent vibration level has a typical statistical dispersion standard deviation of 1 m s2 Technical data 425 BVS Engine Cylinder displacement cm3 25 4 Idle speed rpm 2800 Max engine output acc to ISO 8893 kW rpm Catalytic converter muffler No Speed regulated ignition ...

Page 20: ...Original instructions z Vu 61 z Vu 61 2012 09 07 1154859 26 ...

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