Information Before You Start - Stihl MS 193 Instruction Manual

Releasing the chain brake
Pull the hand guard back toward the
N
front handle.
NOTICE
Always disengage chain brake before
accelerating engine and before starting
cutting work. The only exception to this
rule is when you check operation of the
chain brake.
High revs with the chain brake engaged
(chain locked) will quickly damage the
powerhead and chain drive (clutch,
chain brake).
The chain brake is designed to be
activated also by the inertia of the front
hand guard
if the forces are sufficiently high. The
hand guard is accelerated toward the
bar nose - even if your left hand is not
behind the hand guard, e.g. during a
felling cut. The chain brake will operate
only if it has been properly maintained
and the hand guard has not been
modified in any way.
MS 193 C
Check operation of chain brake
Before starting work: Run engine at idle
speed, engage the chain brake (push
hand guard toward bar nose).
Accelerate up to full throttle for no more
than 3 seconds – the chain must not
rotate. The hand guard must be free
from dirt and move freely.
Chain brake maintenance
The chain brake is subject to normal
wear. It is necessary to have it serviced
and maintained regularly by trained
personnel, such as your STIHL servicing
dealer, at the following intervals:
Full-time usage:
Part-time usage:
Occasional usage:

Information Before You Start

The three positions of the Master
Control lever:
Stop 0 – engine off – the ignition is
switched off.
every 3
Normal run position F – engine runs or
months
can fire.
every 6
To move the Master Control lever from F
months
to n, press down the throttle trigger
every 12
lockout and squeeze the throttle trigger
months
at the same time.
Starting throttle position n – this
position is used to start a warm engine.
The Master Control lever moves to the
normal run position as soon as the
throttle trigger is squeezed.
English
STOP
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