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
18.6.1 Versions with manual fuel pump
2310BA021 KN
► Press the manual fuel pump bulb at least five
times – even if the bulb is already filled with
fuel.
18.6.2 All models
3
1
2
4
2310BA002 KN
0
► Push the hand guard (1) forward – the chain is
locked.
► Press down the trigger lockout (2) and pull the
throttle trigger (3) at the same time. Set Mas‐
ter Control lever (4) to:
Choke shutter closed (l)
–
if the engine is cold (also use this position if
the engine stopped when you opened the
throttle after starting)
Starting throttle position (n)
–
if the engine is warm, i.e. if it has been running
for about one minute.
► Hold and start your saw as described.
18.7 When engine begins to fire
4
2310BA003 KN
STOP
0
► Set the Master Control lever (4) to the starting
throttle position (n).
► Hold and start your saw as described.
18.8 As soon as the engine runs
3
4
2310BA004 KN
STOP
0
► Press down trigger lockout and the blip the
throttle trigger (3) – the Master Control
lever (4) moves to the run position (F) 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 chain brake might oth‐
erwise be damaged.
001BA186 KN
► Pull the hand guard back towards the front
handle.
The chain brake is now disengaged – your saw is
ready for operation.
18 Starting / Stopping the Engine English
0458-737-0121-C 27