MS 650, MS 660
English
3
Do not lend or rent your power tool 
without the instruction manual. Be sure 
that anyone using it understands the 
information contained in this manual.
The use of noise emitting power tools 
may be restricted to certain times by 
national or local regulations.
To operate the power tool you must be 
rested, in good physical condition and 
mental health. If you have any condition 
that might be aggravated by strenuous 
work, check with your doctor before 
operating a power tool.
Persons with pacemakers only: The 
ignition system of your power tool 
produces an electromagnetic field of a 
very low intensity. This field may 
interfere with some pacemakers. To 
reduce health risks, STIHL recommends 
that persons with pacemakers consult 
their physician and the pacemaker 
manufacturer before operating this tool.
Do not operate the power tool if you are 
under the influence of any substance 
(drugs, alcohol) which might impair 
vision, dexterity or judgment.
To reduce the risk of accidents or 
injury, put off the work in poor weather 
conditions (rain, snow, ice, wind).
Use your saw for cutting wood or 
wooden objects only.
Do not use your power tool for any other 
purpose since this may result in 
accidents.
Only use tools, guide bars, chains, chain 
sprockets and accessories that are 
explicitly approved for this power tool 
model by STIHL or are technically 
identical. If you have any questions in 
this respect, consult a servicing dealer. 
Use only high quality parts and 
accessories in order to avoid the risk of 
accidents and damage to the machine.
STIHL recommends the use of STIHL 
original tools, guide bars, chains, chain 
sprockets and accessories. They are 
specifically designed to match your 
model and meet your performance 
requirements.
Never attempt to modify your power tool 
in any way since this may increase the 
risk of personal injury.  STIHL excludes 
all liability for personal injury and 
damage to property caused while using 
unauthorized attachments.
Do not use a pressure washer to clean 
the unit. The solid jet of water may 
damage parts of the unit.
Clothing and Equipment
Wear proper protective clothing and 
equipment.
Avoid clothing that could get caught on 
branches or brush or moving parts of the 
machine. Do not wear a scarf, necktie or 
jewelry. Tie up and confine long hair 
(e.g. with a hair net, cap, hard hat, etc.).
Wear safety glasses or a face shield 
and hearing protection e.g. earplugs or 
ear muffs.
STIHL offers a comprehensive range of 
personal protective clothing and 
equipment.
Transporting the Chain Saw
Always engage the chain brake and fit 
the chain guard (scabbard) before 
carrying the saw short distances. Also 
stop the engine before carrying the saw 
longer distances (more than about  50 
m).
Always carry the saw by the front handle 
(handlebar) – with the hot muffler away 
from your body – the guide bar must 
point to the rear. To avoid serious burn 
injuries, avoid touching hot parts of the 
machine, especially the surface of the 
muffler.
Transporting in a vehicle: Properly 
secure your power tool to prevent 
turnover, fuel spillage and damage.
Clothing must be sturdy 
but allow complete free-
dom of movement. Wear 
snug-fitting clothing with 
cut retardant inserts – 
an overall and jacket 
combination, do not wear 
a work coat.
Wear steel-toed safety 
boots with cut retardant 
inserts and non-slip 
soles.
Wear a safety hard hat 
where there is a danger 
of head injuries from fall-
ing objects.
Wear heavy-duty 
gloves.