Stihl FS 300 Instruction Manual page 11

If one of the wear limit marks on the
PolyCut mowing head is worn through
(arrow): Do not continue using the
mowing head. Install a new one. There
is otherwise a risk of injury from thrown
parts of the head.
It is important to follow the maintenance
instructions for the Polycut mowing
head.
Risk of Kickout (Blade Thrust) with
Metal Cutting Attachments
When using metal cutting attachments
(grass cutting blade, brush knife,
shredder blade, circular saw blade)
there is a risk of kickout when the
rotating blade comes into contact with a
solid object such as a tree trunk, branch,
tree stump, rock or similar. The machine
is thrown to the right or to the rear –
opposite to the attachment's direction of
rotation.
FS 300, FS 350, FS 400, FS 450, FS 480
The risk of kickout is greatest when
the black area of the rotating cutting
attachment comes into contact with a
solid object.
Grass Cutting Blade
Use for grass and weeds only – sweep
the brushcutter in an arc like a scythe.
Improper use may damage the
grass cutting blade – risk of
injury from thrown parts.
Resharpen the grass cutting blade
according to instructions when it has
dulled noticeably.
Brush Knife
Suitable for cutting matted grass, wild
growth and scrub, thinning young stands
with a maximum stem diameter of 2 cm.
To reduce the risk of personal injury,
never attempt to cut thicker wood.
To cut wild growth and scrub, lower the
brush knife down onto the growth to
achieve shredding effect – do not use
the cutting attachment above waist
height.
Exercise extreme caution when using
this method of cutting. The higher the
cutting attachment is off the ground, the
greater the risk of injury from cuttings
being thrown sideways.
Use the brushcutter like a scythe (sweep
it to the right and left) at ground level
when cutting grass and thinning young
stands.
Warning! Improper use of a brush knife
may cause it to crack, chip or shatter –
risk of injury from thrown parts.
To reduce the risk of injury it is essential
to take the following precautions
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