5FS 90, FS 90 R
English / USA
Keep the AV system well maintained. A 
power tool with loose components or 
with damaged or worn AV buffers will 
tend to have higher vibration levels.
Maintain a firm grip at all times, but do 
not squeeze the handles with constant, 
excessive pressure. Wear gloves and 
keep your hands warm. Take frequent 
breaks. 
All the above-mentioned precautions do 
not guarantee that you will not sustain 
whitefinger disease or carpal tunnel 
syndrome. Therefore, continual and 
regular users should closely monitor the 
condition of their hands and fingers. If 
any of the above symptoms appear, 
seek medical advice immediately.
!Warning!
The ignition system of the STIHL unit 
produces an electromagnetic field of a 
very low intensity. This field may 
interfere with some pacemakers. To 
reduce the risk of serious or fatal injury, 
persons with a pacemaker should 
consult their physician and the 
pacemaker manufacturer before 
operating this tool.
Proper Clothing
!Warning!
To reduce the risk of injury, the operator 
should wear proper protective apparel.
The deflector provided with your power 
tool will not protect the operator from all 
foreign objects (gravel, glass, wire, etc.) 
thrown back by the rotating cutting 
attachment. Thrown objects may also 
ricochet and strike the operator. 
!Warning!
To reduce the risk of injury 
to your eyes never 
operate your power tool 
unless wearing goggles or 
properly fitted protective 
glasses with adequate top 
and side protection complying with ANSI 
Z 87.1 (or your applicable national 
standard). To reduce the risk of injury to 
your face STIHL recommends that you 
also wear a face shield or face screen 
over your goggles or protective glasses.
!Warning!
Power tool noise may 
damage your hearing. 
Wear sound barriers (ear 
plugs or ear mufflers) to 
protect your hearing. 
Continual and regular 
users should have their hearing checked 
regularly. 
Be particularly alert and cautious when 
wearing hearing protection because 
your ability to hear warnings (shouts, 
alarms, etc.) is restricted.
Always wear gloves when 
handling the machine and 
metal blades. Heavy-duty, 
nonslip gloves improve 
your grip and help to 
protect your hands.
Clothing must be sturdy 
and snug-fitting, but allow 
complete freedom of 
movement. Wear long 
pants made of heavy 
material to help protect 
your legs. Do not wear 
shorts, sandals or go 
barefoot.