Manual Husqvarna 450 II (page 25 of 120) (English, Portuguese, Spanish)

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CAUTION: Do not mix fuel for more than 1

month at a time.

To fill the fuel tank

WARNING: Obey the procedure that follows

for your safety.

1. Stop the engine and let the engine become cool.

2. Clean the area around the fuel tank cap. (Fig. 41)

3. Shake the container and make sure that the fuel is

fully mixed.

4. Remove the fuel tank cap slowly to release the

pressure.

5. Fill the fuel tank.

CAUTION: Make sure that there is not

too much fuel in the fuel tank. The fuel

expands when it becomes hot.

6. Tighten the fuel tank cap carefully.

7. Clean fuel spillage on and around the product.

8. Move the product 3 m/10 ft or more away from the

refueling area and fuel source before you start the

engine.

Note: To see where the fuel tank is on your product,

refer to

Product overview on page 19

To do a run-in

• During the first 10 hours of operation, do not apply

full throttle without load for extended periods.

To use the correct chain oil

WARNING:

Do not use waste oil, which can

cause injury to you and the environment.

Waste oil also causes damage to the oil

pump, the guide bar and the saw chain.

WARNING: The saw chain can break if the

lubrication of the cutting equipment is not

sufficient. Risk of serious injury or death to

the operator.

WARNING: This product has a function that

lets the fuel run out before the chain oil. Use

the correct chain oil for this function to

operate correctly. Speak to your servicing

dealer when you select your chain oil.

• Use Husqvarna chain oil for maximum saw chain life

and to prevent negative effects on the environment.

If Husqvarna chain oil is not available, we

recommend you to use a standard chain oil.

• Use a chain oil with good adherence to the saw

chain.

• Use a chain oil with correct viscosity range that

agrees with the air temperature.

CAUTION: If the oil is too thin, it runs out

before the fuel. In temperatures below

0°C/32°F some chain oils become too

thick, which can cause damage to the oil

pump components.

• Use the recommended cutting equipment. Refer to

Accessories on page 39

• Remove the cap to the chain oil tank.

• Fill the chain oil tank with chain oil.

• Attach the cap carefully.

(Fig. 42)

Note: To see where the chain oil tank is on your product,

refer to

Product overview on page 19

Kickback information

WARNING: A kickback can cause serious

injury or death to the operator or others. To

decrease the risk you must know the causes

of kickback and how to prevent them.

A kickback occurs when the kickback zone of the guide

bar touches an object. A kickback can occur suddenly

and with large force, which throws the product in the

direction of the operator.

(Fig. 43)

Kickback always occurs in the cutting plane of the guide

bar. Usually, the product is thrown against the operator

but can also move in a different direction. It is how you

use the product when the kickback occurs that causes

the direction of the movement.

(Fig. 44)

A smaller bar tip radius decreases the force of the

kickback.

Use a low kickback saw chain to decrease the effects of

kickback. Do not let the kickback zone touch an object.

WARNING:

No saw chain fully prevents

kickback. Always obey the instructions.

Common questions about kickback

• Will the hand always engage the chain brake during

a kickback?

No. It is necessary to use some force to push the

front hand guard forward. If you do not use the force

necessary, the chain brake will not be engaged. You

must also hold the handles of the product stable with

two hands during work. If a kickback occurs, it is

possible that the chain brake does not stop the saw

1286 - 002 - 03.06.2020

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Husqvarna 450 II Manual

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