Instruction Manual
Table Of Contents
- STIHL MS 231, 251
- 1 Guide to Using this Manual
- 2 Safety Precautions
- 3 Reactive Forces
- 4 Working Techniques
- 5 Cutting Attachment
- 6 Mounting the Bar and Chain (side chain tensioner)
- 7 Mounting the Bar and Chain (quick chain tensioner)
- 8 Tensioning the Saw Chain (side chain tensioner)
- 9 Tensioning the Saw Chain (quick chain tensioner)
- 10 Checking Chain Tension
- 11 Fuel
- 12 Fueling
- 13 Chain Lubricant
- 14 Filling Chain Oil Tank
- 15 Checking Chain Lubrication
- 16 Chain Brake
- 17 Winter Operation
- 18 Starting / Stopping the Engine
- 18.1 Positions of Master Control Lever
- 18.2 Setting the Master Control Lever
- 18.3 Fuel pump
- 18.4 Holding the Saw
- 18.5 Cranking
- 18.6 Starting the Saw
- 18.7 When engine begins to fire
- 18.8 As soon as the engine runs
- 18.9 At very low outside temperatures
- 18.10 Stopping the engine
- 18.11 If the engine does not start
- 19 Operating Instructions
- 20 Taking Care of the Guide Bar
- 21 Shroud
- 22 Air Filter System
- 23 Cleaning the Air Filter
- 24 Adjusting the Carburetor
- 25 Spark Plug
- 26 Storing the Machine
- 27 Checking and Replacing the Chain Sprocket
- 28 Maintaining and Sharpening the Saw Chain
- 29 Maintenance and Care
- 30 Minimize Wear and Avoid Damage
- 31 Main Parts
- 32 Specifications
- 33 Ordering Spare Parts
- 34 Maintenance and Repairs
- 35 Disposal
- 36 EC Declaration of Conformity
18.2 Setting the Master Control
Lever
To move the Master Control lever from the nor‐
mal 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 posi‐
tion (n).
The Master Control lever must be in the choke
closed position (l) for the changeover to the
starting throttle position (n).
The Master Control lever moves from the starting
throttle position (n) to the run position (F) when
you press down the throttle trigger lockout and
blip the throttle trigger at the same time.
To switch off the engine, move the Master Con‐
trol lever to Stop (
0).
18.2.1
Choke shutter closed (l)
–
if the engine is cold
–
if the engine stalls when you open the throttle
after starting.
–
if the fuel tank was run until empty (engine
stopped).
18.2.2
Starting throttle position (n)
–
if the engine is warm, i.e. if it has been running
for about one minute.
–
When the engine begins to fire
–
after clearing a flooded combustion chamber.
18.3 Fuel pump
Press the manual fuel pump bulb several times –
even if the bulb is already filled with fuel:
–
When starting for the first time.
–
if the fuel tank was run until empty (engine
stopped).
18.4 Holding the Saw
There are two ways of holding the saw when
starting.
18.4.1 On the ground
2310BA008 KN
► Place your saw on the ground. Make sure you
have a firm footing – check that the chain is
not touching any object or the ground.
► 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.
18 Starting / Stopping the Engine English
0458-737-0121-C 25