Husqvarna 3120XP 사용자 설명서

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MAINTENANCE
Remove the recoil spring by tapping the starter, with the 
inside facing downwards, gently on a work bench. If the 
spring pops out during assembly, coil it up from the 
outside, working inwards.
Lubricate the recoil spring with light oil. Fit the pulley and 
tension the recoil spring.
Fitting the starter
To fit the starter, first pull out the starter cord and place the 
starter in position against the crankcase. Then slowly 
release the starter cord so that the pulley engages with 
the pawls.
Fit and tighten the screws that hold the starter.
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.
Clean the air filter daily, or more often in demanding 
conditions.
Remove the air filter after taking off the air filter cover. 
When refitting make sure that the air filter seals tightly 
against the filter holder. Clean the filter by brushing or 
shaking it.
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.
IMPORTANT! A flocked air filter should be used to avoid 
excessive engine wear under extremely dusty conditions, 
such as cutting wood that contains sand, volcanic ash, burnt 
wood, or when cutting construction timber.
CAUTION! Foam air filters must be oiled before use. Use 
special Twin Air Oil or, if unavailable, SAE 30 oil.
Spark plug
The spark plug condition is influenced by:
Incorrect carburettor adjustment.
Wrong fuel mixture (too much oil).
A dirty air filter.
These factors cause deposits on the spark plug electrodes, 
which may result in operating problems and starting 
difficulties.
If the machine is low on power, difficult to start or runs 
poorly at idle speed: always check the spark plug first 
before taking any further action. If the spark plug is dirty, 
clean it and check that the electrode gap is 0.5 mm 
(0,020"). The spark plug should be replaced after about a 
month in operation or earlier if necessary.
CAUTION! Always use the recommended spark plug type! 
Use of the wrong spark plug can damage the piston/cylinder.