Testing The Chain Saw And Battery - Stihl MSA 300.0 Instruction Manual

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► Press the trigger lockout (1) with your hand
and keep it pressed.
► Press the unlock button (2).
The "STATUS" (4) LED and the LED of the
power level last used light up.
► Press the trigger (3) with your index finger and
keep it depressed.
The chainsaw accelerates and the chain starts
moving.
The more you depress the trigger (3), the faster
the saw chain rotates. If power level
is set, you do not have to completely press the
trigger (3) to reach the maximum power.
You can also turn on the chainsaw by first press‐
ing the unlock button (2) and then within 5 sec‐
onds (while the "STATUS" LED is flashing)
pressing the trigger lockout (1). The trigger (3) is
now unlocked, and the chainsaw is ready for
use.
When the trigger (3) and the trigger lockout (1)
are released after the chainsaw is turned on, the
LED "STATUS" (4) and the LED of the power
level last used will continue to flash for 1 second.
As long as the LEDs are flashing, the chainsaw
can be turned on again without having to operate
the unlock button (2).
11.2 Switching Off the Chainsaw
► Release the trigger and trigger lockout.
Wait until the saw chain comes to a complete
standstill after about 1 second.
► If the saw chain is still moving after approx. 1
second: Engage the chain brake, remove the
battery and consult a STIHL servicing dealer.
Your chainsaw is defective.
12 Testing the Chain Saw and
Battery
12.1 Checking the Chain Sprocket
► Switch off the chain saw, engage the chain
brake and remove the battery.
► Disengage the chain brake.
► Remove the chain sprocket cover.
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12 Testing the Chain Saw and Battery

► Remove the bar and chain.
a
► Use a STIHL gauge to check the wear marks
on the sprocket.
► If wear marks are deeper than a = 0.5 mm: Do
not use your chain saw and contact your
STIHL servicing dealer.
The chain sprocket must be replaced.
12.2 Checking the Guide Bar
► Switch off the chain saw, engage the chain
brake and remove the battery.
► Remove the chain and guide bar.
► Measure depth of bar groove with scale on
STIHL filing gauge.
► Install a new guide bar if one of the following
points applies:
– Guide bar is damaged.
– Measured bar depth is less than specified
minimum depth,
– Bar groove is pinched or splayed.
► If you have any queries: Contact your STIHL
servicing dealer.
12.3 Checking the Saw Chain
► Switch off the chainsaw, engage the chain
brake and remove the battery.
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0458-009-9602-A