Felling Cut For Small Diameter Trees: Simple Fan Cut; Felling Cut For Large Diameter Trees; Sectioning Method; Plunge-Cut Method - Stihl 9 Instruction Manual

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Be extremely careful with partially fallen
trees which are poorly supported.
When the tree hangs or for some other
reason does not fall completely, set the
saw aside and pull the tree down with a
cable winch, block and tackle or tractor.
If you try to cut it down with your saw,
you may be injured.
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Engage the bumper spikes of the chain-
saw directly behind the location of the
intended hinge and pivot the saw around
this point only as far as the hinge. The
bumper spike rolls against the trunk.
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Felling a tree that has a diameter greater
than the length of the guide bar requires
use of either the sectioning felling cut or
plunge-cut method. These methods are
extremely dangerous because they
involve the use of the nose of the guide
bar and can result in kickback. Only
properly trained professionals should
attempt these techniques.
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For the sectioning method make the first
part of the felling cut with the guide bar
fanning in toward the hinge. Then, using
the bumper spike as a pivot, reposition
the saw for the next cut.
Avoid repositioning the saw more than
necessary. When repositioning for the
next cut, keep the guide bar fully engaged
in the kerf to keep the felling cut straight.
If the saw begins to pinch, insert a
wedge to open the cut. On the last cut,
do not cut the hinge.
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Timber having a diameter more than
twice the length of the guide bar requires
the use of the plunge-cut method before
making the felling cut.