Stihl Chainsaws Ms 180 C Manual

MS 170, MS 170 C, MS 180, MS 180 C
English
29
Removing the chain sprocket cover
NUnscrew nuts and remove chain 
sprocket cover
NTurn screw (1) to the left until the 
tensioner slide (2) butts against the 
left end of the housing slot
Releasing the chain brake
NPull hand guard towards the front 
handle until it engages audibly – 
chain brake is released
Fitting the saw chain
WARNING
Put on protective gloves – risk of injury 
by the sharp cutters
NFit the chain starting at the nose of 
the guide...

MS 170, MS 170 C, MS 180, MS 180 C
English
30 Retensioning during cutting work:
NSwitch off the engine.
NLoosen the nuts.
NHold the bar nose up.
NUse a screwdriver to turn the 
tensioning screw (1) clockwise until 
the chain fits snugly against the 
underside of the bar.
NWhile still holding the bar nose up, 
tighten down the nuts firmly.
NGo to "Checking Chain Tension".
A new chain has to be retensioned more 
often than one that has been in use for 
some time.
NCheck chain tension frequently –...

MS 170, MS 170 C, MS 180, MS 180 C
English
31 NShut off the engine.
NWear work gloves to protect your 
hands.
NThe chain must fit snugly against 
the underside of the bar and it must 
still be possible to pull the chain 
along the bar by hand.
NIf necessary, retension the chain.
A new chain has to be retensioned more 
often than one that has been in use for 
some time.
NCheck chain tension frequently – 
see chapter on "Operating 
Instructions".This engine is certified to operate on 
unleaded...

MS 170, MS 170 C, MS 180, MS 180 C
English
32 STIHL MotoMix uses STIHL HP Ultra 
two-stroke engine oil suited for high 
performance engines.
For further details, see 
www.STIHLusa.com/ethanol
If not using MotoMix, use only STIHL 
two-stroke engine oil or equivalent high-
quality two-stroke engine oils that are 
designed for use in air cooled two-cycle 
engines.
The use of non-seasonal gasoline 
blends may increase the potential for 
pressure to build in the fuel tank during 
operation. For example, using...

MS 170, MS 170 C, MS 180, MS 180 C
English
33
Change the fuel pickup body
Change the fuel pickup body every year.
NOpen the filler cap and drain the fuel 
tank.
NUse a hook to pull the fuel pickup 
body out of the tank and take it off 
the hose.
NOTICE
Do not kink the fuel hose – do not use 
any sharp or pointed tools.
NPush the new pickup body into the 
hose.
NPlace the pickup body in the tank 
and close the filler cap.For automatic and reliable lubrication of 
the chain and guide bar – use only an...

MS 170, MS 170 C, MS 180, MS 180 C
English
34 for assistance if necessary STIHL 
recommends that you have servicing 
and repair work carried out exclusively 
by an authorized STIHL servicing 
dealer.
The saw chain must always throw off a 
small amount of oil.
NOTICE
Never operate your saw without chain 
lubrication. If the chain runs dry, the 
whole cutting attachment will be 
irretrievably damaged within a very short 
time. Always check chain lubrication and 
the oil level in the tank before starting...

MS 170, MS 170 C, MS 180, MS 180 C
English
35
Releasing the chain brake
NPull the hand guard back toward the 
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...

MS 170, MS 170 C, MS 180, MS 180 C
English
36
Setting the Master Control Lever
To move the Master Control lever from 
the normal run position (F) to choke 
closed (l), press down the throttle 
trigger lockout and squeeze the throttle 
trigger at the same time and hold them in 
that position – now set the Master 
Control lever.
To select the starting throttle 
position (n), move the Master Control 
lever to choke closed (l) first, then 
push it into the starting throttle 
position (n).
The Master Control...

MS 170, MS 170 C, MS 180, MS 180 C
English
37
Cranking
Standard versions
NPull the starter grip slowly with your 
right hand until you feel it engage – 
and then give it a brisk strong pull 
and push down the front handle at 
the same time. Do not pull out the 
starter rope to full length – it might 
otherwise break. Do not let the 
starter grip snap back. Guide it 
slowly back into the housing so that 
the starter rope can rewind properly. 
If the engine is new or after a long out-of-
service period, it...

MS 170, MS 170 C, MS 180, MS 180 C
English
38
When engine begins to fire
NSet the Master Control lever (3) to 
the starting throttle positionn and 
continue cranking.
As soon as the engine runs
NPress down the trigger lockout (2) 
and the blip the throttle trigger (4) – 
the Master Control lever (3) moves 
to the run positionF and the engine 
settles down to idling speed.
NOTICE
As the chain brake is still engaged, the 
engine must be returned to idling speed 
immediately – or the engine housing and...