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STARTING AND STOPPING

20 – English

1153136-95 Rev.2 2010-04-08

Starting and stopping

Starting

The chain brake should be activated when starting the 
chain saw. Activate the chain brake by pushing the front 
hand guard forwards. 

(49)

Cold engine

Start position, 1:

 Set the start/stop switch in the choke 

position by pulling the red control outward - upward. 

(50)

Decompression valve (2):

 Press the valve to reduce the 

pressure in the cylinder and make starting easier. Once 
the machine has started the valve will automatically return 
to its original setting. 

(50)

Air purge (3):

 Press the air purge diaphragm repeatedly 

until fuel fills the diaphragm (at least 6 times). The 
diaphragm need not be completely filled. 

(50)

Grip the front handle with your left hand. Hold the chain 
saw on the ground by placing your right foot through the 
rear handle.  

(51)

Pull the starter handle, 4:

 Pull the starter handle with 

your right hand and pull out the starter cord slowly until 
you feel a resistance (as the starter pawls engage) then 
pull firmly and rapidly until the engine fires.

Push down the red choke control, 5:

 As soon as the 

engine fires which can be heard through a "puff" sound, 
push down on the red choke control.

Pull the starter handle (6):

 Keep on pulling the cord 

powerfully until the engine starts.

Warm engine

Start position, 1:

 The correct choke/start throttle setting 

for warm starting is obtained by initially moving the choke 
control by pulling the red control outward - upwards. 

(50)

Decompression valve (2):

 Press the valve to reduce the 

pressure in the cylinder and make starting easier. Once 
the machine has started the valve will automatically return 
to its original setting. 

(50)

Air purge (3):

 Press the air purge diaphragm repeatedly 

until fuel fills the diaphragm (at least 6 times). The 
diaphragm need not be completely filled. 

(50)

Push down the red choke control, 5:

 This inactivates 

the choke, which is not needed when starting a warm 
chain saw. However the movement of the start/stop switch 
will have engaged a high idle, making warm starting 
easier.

Pull the starter handle, 6:

 Grip the front handle with your 

left hand. Hold the chain saw on the ground by placing 
your right foot through the rear handle.  

(51)

Pull the starter handle with your right hand and pull out 
the starter cord slowly until you feel a resistance (as the 
starter pawls engage) then pull firmly and rapidly until the 
engine fires.
As the chain brake is still engaged the speed of the 
engine must be set to idling as soon as possible, this is 
achieved by disengaging the throttle lock.  
Disengagement is done by gently touching on the throttle 
trigger.  This prevents unnecessary wear to the clutch, 
clutch drum and brake band. Allow the machine to idle a 
few seconds before giving full throttle.
There is a simplified start reminder with illustrations to 
describe each step on the rear edge of the saw (A). 

(50)

NB! 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.

Note!

 

Pull the front hand guard towards the front 

handle. The chain brake is now disengaged.

 Your saw 

is ready for use.

Never start a chain saw unless the bar, chain and all 
covers are fitted correctly. See instructions under the 
heading Assembly. Without a bar and chain attached 
to the chain saw the clutch can come loose and cause 
serious injury.

The chain brake should be activated when starting. 
Se instructions under the heading Start and stop. Do 
not drop start. This method is very dangerous 
because you may lose control of the saw. 

(52)

Never start the machine indoors. Exhaust fumes can 
be dangerous if inhaled.

Observe your surroundings and make sure that there 
is no risk of people or animals coming into contact 
with the cutting equipment.

Always hold the saw with both hands. The right hand 
should be on the rear handle, and the left hand on the 
front handle. All people, whether right or left handed, 
should use this grip. Use a firm grip with thumbs and 
fingers encircling the chain saw handles.

Stopping

Stop the engine by pushing the start/stop switch down. 

(53)

NB! The start/stop switch automatically returns to run 
position. To avoid involuntary start up, the spark plug cap 
must always be removed from the spark plug when the 
machine is unsupervised. 

(54)

!

WARNING! Note the following before 
starting:

The chain brake must be engaged when 
the chain saw is started to reduce the 
chance of contact with the moving chain 
during starting. 

Never start a chain saw unless the bar, 
chain and all covers are fitted correctly. 
Otherwise the clutch can come loose and 
cause personal injuries.

Place the machine on firm ground. Make 
sure you have a secure footing and that 
the chain cannot touch anything.

Keep people and animals well away from 
the working area.

Never wrap the starter cord around your 
hand.

!

WARNING! Long term inhalation of the 
engine’s exhaust fumes, chain oil mist 
and dust from sawdust can represent a 
health risk.

Содержание 1153136-95

Страница 1: ...v 2 2010 04 08 445 445e 450 450e Operator s manual Please read the operator s manual carefully and make sure you understand the instructions before using the machine E E E En n n ng g g gl l l li i i is s s sh h h h ...

Страница 2: ...2 1153136 95 Rev 2 2010 04 08 1 2 3 4 7 10 5 6 8 9 11 12 13 14 15 16 17 ...

Страница 3: ...3 1153136 95 Rev 2 2010 04 08 18 19 20 21 22 25 28 23 24 26 27 29 30 31 32 33 34 35 36 37 40 38 39 ...

Страница 4: ...4 1153136 95 Rev 2 2010 04 08 49 52 47 48 50 51 53 54 55 56 57 59 43 41 42 44 45 46 58 60 61 62 2 A 3 1 ...

Страница 5: ...5 1153136 95 Rev 2 2010 04 08 63 64 65 67 68 70 74 77 71 66 75 76 78 79 80 81 82 83 84 85 86 1 2 3 69 72 73 87 1 2 1 2 1 3 ...

Страница 6: ...6 1153136 95 Rev 2 2010 04 08 101 105 99 100 102 103 106 107 108 110 111 112 91 95 88 90 92 94 96 97 98 89 93 104 1 2 A B 109 113 ...

Страница 7: ...sion valve when starting the machine Ignition choke Set the choke control in the choke position This should automatically set the stop switch to the start position Air purge Adjustment of the oil pump Other symbols decals on the machine refer to special certification requirements for certain markets Switch off the engine before carrying out any checks or maintenance NB The start stop switch automat...

Страница 8: ...ING Starting and stopping 20 WORKING TECHNIQUES Before use 21 General working instructions 21 How to avoid kickback 24 MAINTENANCE General 25 Carburetor adjustment 25 Checking maintaining and servicing chain saw safety equipment 25 Muffler 26 Starter 26 Air filter 27 Spark plug 27 Lubricating the bar tip sprocket 27 Needle bearing lubrication 27 Cooling system 28 Air Injection centrifugal cleaning 2...

Страница 9: ...r the address of your nearest servicing dealer It is our wish that you will be satisfied with your product and that it will be your companion for a long time Think of this operator s manual as a valuable document By following its content using service maintenance etc the life span and the second hand value of the machine can be extended If you ever lend or sell this machine make sure that the borro...

Страница 10: ...ING Never allow children to use or be in the vicinity of the machine As the machine is equipped with a spring loaded stop switch and can be started by low speed and force on the starter handle even small children under some circumstances can produce the force necessary to start the machine This can mean a risk of serious personal injury Therefore remove the spark plug cap when the machine is not u...

Страница 11: ... accidents but only you can prevent them 3 Take care when using your saw and make sure the kickback zone of the bar never touches any object 4 The chain brake A can either be activated manually by your left hand or automatically by the inertia release mechanism 5 The brake is applied when the front hand guard B is pushed forwards 5 This movement activates a spring loaded mechanism that tightens th...

Страница 12: ...on Second it must be activated during the kickback as described above to stop the saw chain Third the chain brake may be activated but if the bar is too close to you the brake might not have enough time to slow down and stop the chain before the chain saw hits you Only you and proper working technique can eliminate kickback and its danger Throttle lockout The throttle lockout is designed to preven...

Страница 13: ...reduce the effects of kickback Bar The smaller the tip radius the lower the chance of kickback Chain A chain is made up of a number of links which are available in standard and low kickback versions Some terms that describe the bar and chain To maintain the safety features of the cutting equipment you should replace a worn or damaged bar or chain with a bar and chain combinations recommended by Hu...

Страница 14: ...o the same length When the length of the cutting teeth is reduced to 5 325 32 inch 4 mm the chain is worn out and should be replaced 23 General advice on adjusting depth gauge setting When you sharpen the cutting tooth A the depth gauge setting C will decrease To maintain optimal cutting performance the depth gauge B has to be filed down to achieve the recommended depth gauge setting See instructio...

Страница 15: ...also adjustable The saw chain oil tank and the fuel tank are designed so that the fuel runs out before the saw chain oil However this safety feature requires that you use the right sort of chain oil if the oil is too thin it will run out before the fuel and that you adjust the carburetor as recommended a lean mixture may mean that the fuel lasts longer than the oil and that you also use the recomm...

Страница 16: ...ry Whether the groove in the bar has become badly worn Replace the bar if necessary Whether the tip of the bar is uneven or badly worn If a hollow forms on the underside of the bar tip this is due to running with a slack chain To prolong the life of the bar you should turn it over regularly WARNING Most chain saw accidents happen when the chain touches the operator Wear personal protective equipme...

Страница 17: ...ed frequently until the chain is run in Check the chain tension regularly A correctly tensioned chain ensures good cutting performance and long life 44 445e 450e Check that the chain brake is in disengaged position by moving the front hand guard towards the front handle 45 Loosen the chain tensioner wheel and remove the clutch cover chain brake Remove the transport guard A 46 Fit the bar over the ...

Страница 18: ...nning in Avoid running at a too high speed for extended periods during the first 10 hours Two stroke oil For best results and performance use HUSQVARNA two stroke engine oil which is specially formulated for our air cooled two stroke engines Never use two stroke oil intended for water cooled engines sometimes referred to as outboard oil rated TCW Never use oil intended for four stroke engines Mixin...

Страница 19: ...or longer periods of storage or for transport of the chain saw the fuel and chain oil tanks should be emptied Ask where you can dispose of waste fuel and chain oil at your local gas station The bar guard must always be fitted to the cutting attachment when the machine is being transported or in storage in order to prevent accident contact with the sharp chain Even a non moving chain can cause serio...

Страница 20: ...e engine fires As the chain brake is still engaged the speed of the engine must be set to idling as soon as possible this is achieved by disengaging the throttle lock Disengagement is done by gently touching on the throttle trigger This prevents unnecessary wear to the clutch clutch drum and brake band Allow the machine to idle a few seconds before giving full throttle There is a simplified start re...

Страница 21: ...g the chain brake Carry the chain saw with the bar and chain pointing backwards Fit a guard to the bar before transporting the chain saw or carrying it for any distance 7 When you put the chain saw on the ground lock the saw chain using the chain brake and ensure you have a constant view of the machine Switch the engine off before leaving your chain saw for any length of time General rules 1 If yo...

Страница 22: ...ushing chain Cutting with a pushing chain increases the risk of kickback See instructions under the heading How to avoid kickback Terms Cutting General term for cutting through wood Limbing Cutting branches off a felled tree Splitting When the object you are cutting breaks off before the cut is complete There are five important factors you should consider before making a cut 1 Make sure the cutting...

Страница 23: ...ect the felling direction but does affect your safety is to make sure the tree has no damaged or dead branches that might break off and hit you during felling The main point to avoid is letting the tree fall onto another tree It is very dangerous to remove a trapped tree and there is high accident risk See instructions under the heading Freeing a tree that has fallen badly 76 Clearing the trunk an...

Страница 24: ... advice Position yourself so that you will be clear of the tree or branch when the tension is released 87 Make one or more cuts at or near the point of maximum tension Make as many cuts of sufficient depth as necessary to reduce the tension and make the tree or branch break at the point of maximum tension 88 Never cut straight through a tree or branch that is in tension If you must cut across tree ...

Страница 25: ... the H jet is set too lean the machine will have less power poor acceleration and could suffer damage to the engine Checking maintaining and servicing chain saw safety equipment Chain brake and front hand guard Checking brake band wear Brush off any wood dust resin and dirt from the chain brake and clutch drum Dirt and wear can impair operation of the brake 91 Regularly check that the brake band i...

Страница 26: ... type of muffler you should clean the screen at least once a week This is best done with a wire brush A blocked screen will cause the engine to overheat and may lead to serious damage Note The screen must be replaced if it is damaged If the screen is blocked the machine will overheat and this will cause damage to the cylinder and piston Never use a machine with a muffler that is in poor condition Ne...

Страница 27: ...r seals tightly against the filter holder Clean the filter by brushing or shaking it 107 The filter can be cleaned more thoroughly by washing it in water and detergent 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 A HUSQVARNA chain saw can be equipped w...

Страница 28: ... the starter the fins on the flywheel the space around the flywheel inlet pipe and carburetor compartment Winter use Running problems can occur when using the machine in the cold and snowy conditions caused by Too low engine temperature Icing of the air filter and carburetor Special measures are therefore often required Partly mask the air inlet on the starter to increase the working temperature of th...

Страница 29: ...rly for more even wear Check the lubrication hole in the bar to be sure it is not clogged Clean the bar groove If the bar has a sprocket tip this should be lubricated Lubricate the clutch drum bearing Clean the outside of the carburetor Check that the bar and chain are getting sufficient oil File off any burrs from the edges of the bar Check fuel hose for cracks or other damage Change if necessary ...

Страница 30: ... 450e 450 Motor Cylinder displacement cu in cm3 2 79 45 7 2 79 45 7 3 06 50 2 3 06 50 2 Cylinder bore inch mm 1 65 42 1 65 42 1 73 44 1 73 44 Stroke inch mm 1 30 33 1 30 33 1 30 33 1 30 33 Idle speed rpm 2700 2700 2700 2700 Power kW hp rpm 2 1 2 8 9000 2 1 2 8 9000 2 4 3 2 9000 2 4 3 2 9000 Ignition system Spark plug NGK BPMR 7A Champion RCJ 7Y NGK BPMR 7A Champion RCJ 7Y NGK BPMR 7A Champion RCJ ...

Страница 31: ...aw models Husqvarna 445 445e 450 and 450e Other chain saw models may not meet the kickback requirements when equipped with the listed bar and chain combinations Note For the saw chains above if available you are free to choose between 0 050 or 0 058 gauge drive links for the corresponding bar see the table below Saw chain filing and file gauges Bar Chain Length inch Pitch inch Thickness of drive lin...

Страница 32: ...warranty rights and responsibilities you should contact your nearest authorized servicing dealer or call Husqvarna Forest Garden at 1 800 487 5951 or visit www usa husqvarna com WARRANTY COMMENCEMENT DATE The warranty period begins on the date small nonroad engine is delivered LENGTH OF COVERAGE Husqvarna Forest Garden warrants to the initial owner and each subsequent purchaser that the engine is ...

Страница 33: ...ssion related parts will be provided without charge to the owner if the part is under warranty EMISSION CONTROLWARRANTY PARTS LIST 1 Carburetor and internal parts 2 Intake pipe airfilter holder and carburetor bolts 3 Airfilter and fuelfilter covered up to maintenance schedule 4 Spark Plug covered up to maintenance schedule 5 Ignition Module MAINTENANCE STATEMENT The owner is responsible for the perfo...

Страница 34: ...t completely and securely assembled Be sure that the saw chain stops moving when the throttle control trigger is released Shut off the engine before setting the chain saw down Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance When cutting a limb that is under tension be alert for springb...

Страница 35: ...35 1153136 95 Rev 2 2010 04 08 ...

Страница 36: ...53136 95 z U e 56 z U e 56 2010 04 08 The engine exhaust from this product contains chemical known to the State of California to cause cancer birth defects or other reproductive harm Original instructions ...

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