Stihl MS 661 C-M Instruction Manual page 34

English
Use the sectioning method for making the felling back cut on
trees with a diameter more than the effective cutting length
of the guide bar.
1
► After creating the felling notch, make the first part of the
felling back cut with the guide bar fanning in toward the
hinge and 1 to 2 in. (2.5 to 5 cm) higher than the bottom of
the felling notch. Pivot the saw around this point only as
far as the back of the hinge. Do not cut through the hinge.
► When repositioning for the next cut, keep the guide bar
fully engaged in the kerf to keep the felling back cut
straight. If the saw begins to pinch, insert a wedge to open
the cut. On the last cut, do not cut the hinge.
► Avoid repositioning the saw more than necessary.
7.5.9 Plunge-cut Method
WARNING
This method is extremely dangerous because it involves the
use of the nose of the guide bar and can result in kickback.
If you are inexperienced with a chain saw, plunge-cutting
should not be attempted. Seek the help of a professional.
32
7 Proper Techniques for Basic Bucking, Limbing, Pruning and Felling
Use the plunge-cut method for making the felling back cut on
trees with a diameter more than twice the effective cutting
length of the guide bar.
3
2
4
► After creating a large felling notch, begin the plunge cut by
► With the saw at full throttle, insert the guide bar in the
► Enlarge the plunge cut as illustrated in the illustration
► Follow the sectioning method described previously to
3
2
1
applying the lower portion of the guide bar nose to the tree
at an angle. Cut until the depth of the kerf is about the
same as the width of the guide bar. Next, align the saw in
the direction in which the recess is to be cut.
trunk.
above.
make the felling back cut.
4
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