Stihl Ms 270 C Owners Manual

30 English / USAMS 270, MS 270 C, MS 280, MS 280 C
:
When fitting the chain sprocket 
cover, check that the teeth of the 
tensioning gear and adjusting wheel 
mesh properly. If necessary, turn the 
adjusting wheel  (12) slightly until the 
sprocket cover can be pushed flush 
against the engine housing.
: Pull out the hinged clip  (13) so that 
it snaps into position.
: Engage wingnut and tighten it down 
moderately.
Go to chapter Tensioning the Saw 
Chain Retensioning during cutting work:
:
Shut off the...

31
MS 270, MS 270 C, MS 280, MS 280 C English / USA
: Shut off the engine.
: Wear work gloves.
: Chain must fit snugly against the 
underside of the bar – and, with the 
chain brake disengaged, it must still 
be possible to pull the chain along 
the bar by hand.
: If necessary, retension the chain.
A new chain has to be retensioned more 
often than one that has been in use for 
some time.
Check chain tension frequently – see 
Operating Instructions. This engine is certified to operate on 
unleaded...

32 English / USAMS 270, MS 270 C, MS 280, MS 280 C
Fuel mix ages
Only mix sufficient fuel for a few days 
work, not to exceed 3 months of storage. 
Store in approved fuel-canisters only. 
When mixing, pour oil into the canister 
first, and then add gasoline. Close the 
canister and shake it vigorously by hand 
to ensure proper mixing of the oil with 
the fuel.       
Dispose of empty mixing-oil canisters 
only at authorized disposal locations.
Before fueling, clean the filler cap and 
the area around it...

33
MS 270, MS 270 C, MS 280, MS 280 C English / USA
Closing the cap
: Fit the cap - grip upright -marks 
must line up.
: Turn the cap clockwise as far as 
stop (approx. a quarter turn).
: Fold the grip flush with the top of the 
cap.
If the grip does not lie completely flush 
with the cap and the detent on the grip 
does not engage the recess in the filler 
neck, the cap is not properly seated and 
tightened and you must repeat the 
above steps.
Change the fuel pickup body 
once every year: Drain the...

34 English / USAMS 270, MS 270 C, MS 280, MS 280 C
If special chain lubricant is not available, 
you may – in an emergency – use an HD 
single grade or multigrade engine oil 
with a viscosity that suits the prevailing 
outside temperature.
Do not use waste oil!
Medical studies have shown that 
renewed contact with waste oil can 
cause skin cancer. Moreover, waste 
is environmentally harmful!
Waste oil does not have the 
necessary lubricating properties 
and is unsuitable for chain 
lubrication. :...

35
MS 270, MS 270 C, MS 280, MS 280 C English / USA
Locking chain with chain brake– in an emergency
– when starting
– at idling speed
The chain is stopped and locked when 
the hand guard is pushed toward the bar 
nose by the left hand –
or when brake is activated by inertia in 
certain kickback situations.
Releasing the chain brake:
Pull the hand guard back toward the 
front handle.
Always disengage chain brake 
before accelerating engine and 
before starting cutting work. The 
only exception to this...

36 English / USAMS 270, MS 270 C, MS 280, MS 280 CChain brake maintenanceThe chain brake is subject to normal 
wear. It is necessary to have it serviced 
and maintained regularly by trained 
personnel, such as your STIHL servicing 
dealer, at the following intervals:
  
At temperatures below +50 °F
(+10 °C), preheat carburetor as 
follows::Use a suitable screwdriver to turn 
the shutter ( 1) from the summer  
position ( s) to the winter position 
( r ) – the shutter must snap into 
position.
If the...

37
MS 270, MS 270 C, MS 280, MS 280 C English / USA
The four positions of the 
Master Control lever
0 = Engine off  – 
ignition is switched off. 
#  =  Normal run position  – 
engine runs or can fire.
To move the Master Control lever from   #  
to n
 or 
l
, press down the throttle 
trigger interlock and squeeze throttle 
trigger at the same time.   
n
=Warm start – this position is used to 
start a warm engine. The Master 
Control lever moves to the normal 
run position as soon as the throttle 
trigger...

38 English / USAMS 270, MS 270 C, MS 280, MS 280 C
:
Place your saw on the ground.  
Make  sure you have a firm footing – 
check that chain is not touching any 
object or the ground.
Bystanders must be well clear of the 
general work area of the saw.
: Hold the saw firmly on the ground 
with your left hand on the front 
handle – your thumb should be 
under the handle.
: Put your right foot into the rear 
handle and press down. Alternative method of starting:
: Hold the rear handle tightly between 
your...

39
MS 270, MS 270 C, MS 280, MS 280 C English / USA
When engine begins to fire:
: Press in decompression valve.
: Move Master Control lever ( 4) to  n 
and continue cranking –   as soon 
as engine  runs, immediately  blip 
the throttle trigger ( 5) – 
the Master Control lever ( 4) will 
move to the “Run” position  #  (6) 
and the engine will settle down to 
idling speed.
.
As the chain brake is still engaged, 
the engine must be returned to 
idling speed  immediately  – or the 
engine and chain brake...