OPERATION
CS-400
40
X7503256004
© 08/2020 ECHO Incorporated
Bucking
Bucking is the sawing of a log or
fallen tree into smaller pieces. There
are a few basic rules which apply to
all bucking operations.
• Keep both hands on the handles
at all times.
• Support logs if possible.
• When cutting on a slope or
hillside, always stand uphill.
Keep in mind that the wood is heavy
and that it will bend and pinch the
saw if improperly supported. The
trunk will weaken at the point where
you make the cut unless the tree is
lying on perfectly flat ground or
supported as shown. If you make
the cut with the tree on the ground,
don’t let the saw’s chain dig into the
earth; it is harmful for the saw, and
you stand a good chance of being
struck by flying debris.
To cut the trunk, use the bucking and two-cut sequence shown. The first cut
should be no deeper than one-third the trunk diameter.
Chain And Guide Bar Combination
The following combinations are recommended for model CS-400.
Guide Bar
Saw Chain
Length mm
(in.)
ECHO Part No.
Pitch mm (in.)
Type
Links
Low-kickback
406 (16)
16A0CD3757
9.53 (3/8)
91PX / 91VG
57
457 (18)
18A0CD3762
9.53 (3/8)
91PX / 91VG
62
Support
Finish cut
Uphill Position
First cut
When the bar nose hits
another tree, etc.
