Husqvarna 439 Operator's Manual page 39

Do not operate a chain saw when you are fatigued.
Use safety footwear; snug-fitting clothing, protective
gloves, and eye, hearing and head protection devices.
Use caution when handling fuel. Move the chain saw at
least 10 feet (3 m) from the fueling point before starting
the engine.
Do not allow other persons to be near the chain saw
when starting or cutting with the chain saw. Keep
bystanders and animals out of the work area.
Do not start cutting until you have a clear work area,
secure footing and a planned retreat path from the
falling tree.
Keep all parts of your body away from the saw chain
when the engine is running.
Before you start the engine, make sure that the saw
chain is not contacting anything.
Carry the chain saw with the engine stopped, the guide
bar and saw chain to the rear, and the muffler away from
your body.
Do not operate a chain saw that is damaged, improperly
adjusted, or not 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
springback so that you will not be struck when the
tension in the wood fibers is released.
Keep handles dry, clean and free of oil or fuel mixture.
Operate the chain saw only in well-ventilated areas.
Do not operate a chain saw in a tree unless you have
been specifically trained to do so.
Do not operate a chain saw above shoulder height.
All chain saw service, other than the items listed in the
operator's/owner's safety and maintenance instructions,
should be performed by competent chain saw service
personnel. (For example, if improper tools are used to
remove the flywheel or if an improper tool is used to hold
the flywheel in order to remove the clutch, structural
damage to the flywheel could occur and subsequently
cause the flywheel to burst.)
When transporting your chain saw, use the appropriate
guide bar guard.
Note: This Annex is intended primarily for the consumer
or occasional user.
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