English
Tensioning the Saw Chain
(side chain tensioner)
Checking Chain Tension
Fuel
This engine is certified to operate on
unleaded gasoline and the STIHL two-
stroke engine oil at a mix ratio of 50:1.
Your engine requires a mixture of high-
quality gasoline and quality two-stroke
air cooled engine oil.
1
Use mid-grade unleaded gasoline with a
minimum octane rating of 89 (R+M/2). If
the octane rating of the mid-grade
gasoline in your area is lower, use
premium unleaded fuel.
Retensioning during cutting work:
N
Shut off the engine.
N
N
N
N
Shut off the engine.
Loosen the nuts.
N
Wear work gloves to protect your
hands.
Fuel with a lower octane rating may
increase engine temperatures. This, in
turn, increases the risk of piston seizure
and damage to the engine.
N
Press down the trigger lockout to
disengage the Quickstop Plus chain
brake.
Hold the bar nose up.
Use a screwdriver to turn the
tensioning screw (1) clockwise until
the chain fits snugly against the
underside of the bar.
N
N
The 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 when the
chain brake is released.
The chemical composition of the fuel is
also important. Some fuel additives not
only detrimentally affect elastomers
(carburetor diaphragms, oil seals, fuel
lines, etc.), but magnesium castings and
catalytic converters as well. This could
cause running problems or even
N
N
While still holding the bar nose up,
tighten down the nuts firmly.
Go to "Checking Chain Tension".
If necessary, retension the chain.
A new chain has to be retensioned more
often than one that has been in use for
some time.
A new chain has to be retensioned more
often than one that has been in use for
some time.
damage the engine. For this reason
STIHL recommends that you use only
high-quality unleaded gasoline!
N
Check chain tension frequently –
see chapter on "Operating
Instructions".
N
Check chain tension frequently –
see chapter on "Operating
Instructions".
Gasoline with an ethanol content of
more than 10% can cause running
problems and major damage in engines
with a manually adjustable carburetor
and should not be used in such engines.
Engines equipped with M-Tronic can be
run on gasoline with an ethanol content
of up to 25% (E25).
Use only STIHL two-stroke engine oil or
equivalent high-quality two-stroke
engine oils that are designed for use
only in air cooled two-cycle engines.
2
6
MS 261 C-Q
| Categories | Chainsaw Manuals, STIHL Chainsaw Manuals |
|---|---|
| Tags | STIHL MS 261 |
| Download File |
|
| Language | English, Español |
| Product Brand | STIHL. Stihl Inc, USA - Corporate phone: (757) 486-9100. International Support Information: http://stihl.com Email: info@stihl.com, Chainsaw |
| Document File Type | |
| Publisher | stihl.com |
| Wikipedia's Page | Stihl |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Lawn and Garden readers have rated STIHL MS 261C Q Chainsaw Owners Manual 5.0 out of 5.0 based on 1 product reviews. Just bought this saw and it’s great so far