Stihl MS 250 Instruction Manual page 52

English
Definitions
1 Carburetor Box Cover Twist Lock
Lock for carburetor box cover.
2 Carburetor Adjusting Screws
For tuning the carburetor.
3 Fuel Pump
Provides additional fuel feed for a
cold start.
4 Decompression Valve
(Automatically Resetting)
Releases compression pressure to
make engine starting easier – when
activated.
5 Chain Brake
A device to stop the rotation of the
chain. Is activated in a kickback
situation by the operator's hand or
by inertia.
6 Muffler
Reduces engine exhaust noises
and diverts exhaust gases away
from operator.
7 Chain Sprocket
The toothed wheel that drives the
saw chain.
8 Chain Sprocket Cover
Covers the clutch and chain
sprocket.
9 Chain Catcher
Helps to reduce the risk of operator
contact by a chain when it breaks or
comes off the bar.
10 Side Chain Tensioner
Permits precise adjustment of chain
tension.
50
11 Front Chain Tensioner
Permits precise adjustment of chain
tension.
12 Guide Bar
Supports and guides the saw chain.
13 Oilomatic Saw Chain
A loop consisting of cutters, tie
straps and drive links.
14 Adjusting Wheel for Quick Chain
Tensioner
Permits precise adjustment of chain
tension.
15 Handle of Wingnut (Quick Chain
Tensioner)
Has to be released to tension chain
with adjusting wheel.
16 Oil Filler Cap
For closing the oil tank.
17 Bumper Spike
Toothed stop for holding saw steady
against wood.
18 Front Hand Guard
Provides protection against
projecting branches and helps
prevent left hand from touching the
chain if it slips off the handlebar. It
also serves as the lever for chain
brake activation.
19 Front Handle (Handlebar)
Handlebar for the left hand at the
front of the saw.
20 Starter Grip
The grip of the pull starter, for
starting the engine.
21 Spark Plug Boot
Connects the spark plug with the
ignition lead.
22 Master Control Lever
Lever for choke control, starting
throttle, run and stop switch
position.
23 Fuel Filler Cap
For closing the fuel tank.
24 Throttle Trigger
Controls the speed of the engine.
25 Throttle Trigger Lockout
Must be depressed before the
throttle trigger can be activated.
26 Rear Handle
The support handle for the right
hand, located at the rear of the saw.
27 Rear Hand Guard
Gives added protection to
operator's right hand.
Guide Bar Nose
The exposed end of the guide bar.
(not illustrated, see chapter
"Tensioning the Saw Chain")
Clutch
Couples engine to chain sprocket
when engine is accelerated beyond
idle speed. (not illustrated)
Anti-Vibration System
The anti-vibration system includes a
number of anti-vibration elements
designed to reduce the
transmission of vibrations created
by the engine and cutting
attachment to the operator's hands.
(not illustrated)
MS 250