Stihl Ms 270 C Owners Manual

50 English / USAMS 270, MS 270 C, MS 280, MS 280 C
:
Remove the chain sprocket cover, 
chain and guide bar.
: Disengage the chain brake:
Pull hand guard toward the front 
handle.
– Replace the chain sprocket after  using two Oilomatic chains.
– Replace sooner if the wear marks  on the sprocket are deeper than 
approx. 0.02 in (0,5 mm) since this 
would reduce the life of the chain. 
You can use a gauge (“Special 
Accessories”) to check the depth of 
the wear marks on sprockets.
It is best to use two...

51
MS 270, MS 270 C, MS 280, MS 280 C English / USA
Correctly sharpened chainA properly sharpened chain slices 
through wood effortlessly and requires 
very little feed pressure.
Do not work with a dull or damaged 
chain as it will increase the physical 
effort required, cause high vibrations, 
produce unsatisfactory cutting results 
and a higher rate of wear.
:
Clean the chain.
:
Check the chain
 for cracks in the 
links and damaged rivets.
: Replace any damaged or worn parts 
of the chain and match...

52 English / USAMS 270, MS 270 C, MS 280, MS 280 C
Furthermore, the angles must be the 
same on all cutters. If angles are 
uneven: Chain will run roughly, not in a 
straight line, wear quickly and finally 
break.
As these requirements can be met only 
after sufficient and constant practice:
:
Use a file holder
A file holder (special accessory) must be 
used for manual resharpening (see table 
Sharpening Tools). The correct filing 
angles are marked on the file holder.
For checking anglesUse a STlHL...

53
MS 270, MS 270 C, MS 280, MS 280 C English / USA
: Always file from the inside to the 
outside of the cutter.
: The file only sharpens on the 
forward stroke – 
lift the file off the cutter on the 
backstroke.
: Avoid touching the tie straps and 
drive links with the file.
: Rotate the file at regular intervals 
while filing to avoid one-sided wear.
: Use a piece of hardwood to remove 
burrs from cutting edge.
: Check angles with the filing gauge.
All cutters must be the same length.
If the cutters...

54 English / USAMS 270, MS 270 C, MS 280, MS 280 C
:
File the top of the depth gauge 
parallel to the stamped service 
marking (see arrow) – but do not 
lower the highest point of the depth 
gauge in this process.
The kickback tendency of the 
chainsaw is increased if the depth 
gauges are too low. :
Place filing gauge on the chain – 
highest point of depth gauge must 
be level with the filing gauge.
PM 1, RM2:
Rear hump of tie strap (with service 
marking) is lowered along with the depth 
gauge. RSC3,...

55
MS 270, MS 270 C, MS 280, MS 280 C English / USA
1)
STIHL recommends that this work be done by 
a STIHL servicing dealer
2) 
see Chain brake
Maintenance ChartPlease note that the following maintenance intervals apply for normal operating conditions only
If your daily working time is longer than normal or cutting conditions are difficult (very dusty work 
area, resin-rich wood, tropical wood etc.), shorten the specified intervals accordingly. If you only 
use the saw occasionally, extend the intervals...

56 English / USAMS 270, MS 270 C, MS 280, MS 280 C1)
STIHL recommends that this work be done by 
a STIHL servicing dealer
2)
Firmly tighten cylinder base screws of 
professional saws (3.4 kW or more) after 10 to 
20 hours of operation
3)
not in all versions, market-specific
Please note that the following maintenance intervals apply for normal operating conditions only.
If your daily working time is longer than normal or cutting conditions are difficult (very dusty work 
area, resin-rich wood, tropical...

57
MS 270, MS 270 C, MS 280, MS 280 C English / USA
    1Carburetor  box cover twist lock
   2 Carburetor adjusting screws
   3 Spark plug boot
  4 Decompression valve* 
(automatically resetting)
   5 Chain sprocket cover
   6 Chain sprocket
  7 Chain brake
  8 Adjusting wheel of quick
chain tensioner*
  9 Side chain tensioner
10 Chain catcher
11 Bumper spike
12 Guide bar
13 Oilomatic saw chain
# Serial number
14 Oil filler cap
15 Muffler
16 Front hand guard
17 Front handle (handlebar)
18 Starter grip...

58 English / USAMS 270, MS 270 C, MS 280, MS 280 CDefinitions  1. Carburetor Box Cover Twist LockLock for carburetor box cover.
  2. Carburetor Adjusting Screws For fine tuning the carburetor.
  3. Spark Plug Boot Connects the spark plug with the 
ignition wire.
  4. Decompression Valve (automatically resetting)
Releases compression resistance 
to make engine starting easier - 
when activated
  5. Chain Sprocket Cover Covers the clutch and the sprocket.
  6.  Chain Sprocket
The toothed wheel that drives...

59
MS 270, MS 270 C, MS 280, MS 280 C English / USA
EngineSTIHL single cylinder two-stroke engine
EPA / CEPA:
The Emission Compliance Period 
referred to on the Emissions 
Compliance Label indicates the number 
of operating hours for which the engine 
has been shown to meet Federal 
emission requirements.
Category:
A = 300 hours, 
B = 125 hours, 
C = 50 hours
CARB:  
The Emission Compliance Period used 
on the CARB-Air Index Label indicates 
the terms: 
Extended = 300 hours, 
Intermediate = 125 hours,...