STIHL MS 171 Owner's Manual | Page 9

STIHL Chainsaws Owner's Manual - MS 171.
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MS 171, MS 181, MS 181 C, MS 211, MS 211 C

English

7

Screw Cap

The screwdriver end of the STIHL 
combination wrench or other similar tool 
can be used as an aid in tightening 
slotted fuel filler caps.

See also the "Fueling" chapter in your 
Instruction Manual for additional 
information.

Before Starting

Take off the chain guard (scabbard) and 
inspect the saw for proper condition and 
operation. (See the maintenance chart 
near the end of the instruction manual.)

For proper assembly of the bar and 
chain follow the procedure described in 
the chapter "Mounting the Bar and 
Chain" of your instruction manual. 
STIHL Oilomatic chain, guide bar and 
sprocket must match each other in 
gauge and pitch. Before replacing any 
bar and chain, see the chapter entitled 
"Specifications" in the instruction 
manual and the section "Kickback" and 
the "ANSI B 175.1-2000 chain saw 
chain saw kickback standard" below.

Keep the handles clean and dry at all 
times; it is particularly important to keep 
them free of moisture, pitch, oil, fuel mix, 
grease or resin in order for you to 
maintain a firm grip and properly control 
your power tool.

Starting

Start and operate your saw without 
assistance. For specific starting 
instructions, see the appropriate section 
of the instruction manual. Proper starting 
methods reduce the risk of injury.

Warning!

Unit vibrations can 
cause an improperly 
tightened fuel filler cap to 
loosen or come off and 
spill quantities of fuel. In 
order to reduce the risk 

of fuel spillage and fire, tighten the fuel 
filler cap by hand as securely as 
possible.

Warning!

Always check your power tool for proper 
condition and operation before starting, 
particularly the throttle trigger, throttle 
trigger lockout, stop switch and cutting 
tool. The throttle trigger must move 
freely and always spring back to the idle 
position. Never attempt to modify the 
controls or safety devices.

Warning!

Never operate your power tool if it is 
damaged, improperly adjusted or main-
tained, or not completely or securely 
assembled.

Warning!

Check that the spark plug boot is 
securely mounted on the spark plug – a 
loose boot may cause arcing that could 
ignite combustible fumes and cause a 
fire.

Warning!

Proper tension of the chain is extremely 
important. In order to avoid improper 
setting, the tensioning procedure must 
be followed as described in your man-
ual. Always make sure the hexagonal 
nut(s) for the sprocket cover is (are) 
tightened securely after tensioning the 
chain in order to secure the bar. Never 
start the saw with the sprocket cover 
loose. Check chain tension once more 
after having tightened the nut(s) and 
thereafter at regular intervals (whenever 
the saw is shut off). If the chain 
becomes loose while cutting, shut off 
the engine and then tighten. Never try to 
adjust the chain while the engine is 
running!

Warning!

To reduce the risk of fire and burn inju-
ries, start the engine at least 10 feet 
(3 m) from the fueling spot, outdoors 
only.

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