Operating The Chainsaw; Chainsaw Kickback - Oregon JW3800 Operación Manual

! Ensure that you do not let go of the cord
while starting, this will cause the cord to
quickly retract and may damage the pull cord
unit.
Once you have heard a single cough or splutter
from the machine, slowly return the
handle/cord to its original position and push the
choke lever back in towards the machine.
Now pull the starter cord until the unit starts,
this may require excessive force which is
normal.
Once the engine has started and you are ready
to cut, disengage the chain brake.
The unit is now ready for use.

Operating the Chainsaw

**CHAINSAW KICKBACK**

! PLEASE READ THE FOLLOWING INFORMATION
CAREFULLY!
Chainsaw kickback can occur when the tip of the
bar comes into contact with a relatively massive
or immovable object with the chain under
power. The area of the bar tip most likely to be
involved is known as the "kickback quarter".
looking from the side of the bar, the kickback
quarter is the 90° section of bar found between
a line going along the centreline of the bar, and
another line at 90° to the first, rising upwards
from the centre of the nose sprocket. If this area
of chain comes into contact with - for instance -
a log, the chain will initially cut the wood, but
will also produce a reaction force which pushes
the bar upwards. As the bar rises, the chain is
forced harder into contact with the wood and
climbs upwards even harder. In a fraction of a
second the chain may jam hard into the wood
and hurl the bar upwards towards the operator,
often causing very severe injury or death. The
violence of a full kickback event is such that no
evasive action is possible, and if the operator's
head, neck or shoulders are in line with the
plane of the bar, he will certainly be struck by it.
At this point, he must rely on the chain brake
and protective clothing to save him from injury
or worse.
Another form of kickback may occur where the
top of the bar is used for cutting and becomes
suddenly pinched by the wood moving. In this
case the saw may be forced backwards towards
the operator, or forced into a position where the
tip is pinched and the saw transitions into a
classic tip-driven kickback. Kickback may also
occur as a result of a failed or improperly
executed boring cut. Bore cutting is a
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