5MS 290, MS 310, MS 390
English / USA
!Warning!
Wear an approved safety 
hard hat to reduce the risk 
of injury to your head. 
Chainsaw noise may 
damage your hearing. 
Wear sound barriers (ear 
plugs or ear mufflers) to help 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.
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.
Always wear gloves when 
handling the machine and 
the cutting tool. Heavy-
duty, nonslip gloves 
improve your grip and 
help to protect your 
hands.
STIHL offers a wide range of protective 
clothing and equipment.
THE POWER TOOL
For illustrations and definitions of the 
power tool parts see the chapter on 
“Main Parts and Controls.”
!Warning!
Never modify this power tool in any way. 
Only attachments supplied by STIHL or 
expressly approved by STIHL for use 
with the specific STIHL model are 
authorized. Although certain 
unauthorized attachments are useable 
with STIHL power tools, their use may, in 
fact, be extremely dangerous.
If this tool is subjected to unusually high 
loads for which it was not designed (e.g. 
heavy impact or a fall), always check 
that it is in good condition before 
continuing work. Check in particular that 
the fuel system is tight (no leaks) and 
that the controls and safety devices are 
working properly. Do not continue 
operating this machine if it is damaged. 
In case of doubt, have it checked by your 
STIHL servicing dealer.
THE USE OF THE POWER TOOL
Transporting the Power Tool
!Warning!
To reduce the risk of injury from saw 
chain contact, never carry or transport 
your power tool with the saw chain 
moving. Always engage the chain brake 
when taking more than a few steps.
!Warning!
Always switch off the engine, and fit the 
chain guard (scabbard) over the chain 
and guide bar before transporting the 
power tool over longer distances. When 
transporting it in a vehicle, properly 
secure it to prevent turnover, fuel 
spillage and damage to the unit.
It may be carried only in a horizontal 
position. Grip the front handle in a 
manner that the machine is balanced 
horizontally. Keep the hot muffler away 
from your body and the cutting 
attachment behind you.
001BA115 KN