Stihl MS 170 User Manual

56
English / USA
MS 170, MS 180, MS 180 C
Definitions
1. Shroud Twist Lock
Lock for shroud.
2. Carburetor Adjusting Screw
For fine-tuning the carburetor.
3. Decompression Valve –
(automatically resetting)
Reduces compression resistance -
to make engine starting easier -
when activated.
4. Chain Brake
A device to stop the rotation of the
chain if activated in a kickback
situation by the operator’s hand or
by inertia.
5. Muffler
Reduces engine exhaust noise and
diverts exhaust gases away from
user.
6. Chain Sprocket
The toothed wheel that drives the
saw chain.
7. Chain Sprocket Cover
Covers the clutch and the sprocket.
8. Chain Catcher
Helps to reduce the risk of operator
contact with a chain if it breaks or
comes off the bar.
9. Chain Tensioner
Permits precise adjustment of chain
tension.
10. Guide Bar
Supports and guides the saw chain.
11. Oilomatic Saw Chain
A loop consisting of cutters, tie
straps and drive links.
12. Adjusting Wheel
Facilitates quick adjustment of chain
tension.
13. Handle of Wingnut
Has to be released to tension chain
with adjusting wheel.
14. Oil Filler Cap
For closing the oil tank.
15. Bumper Spike
Toothed stop for holding saw steady
against wood.
16. Front Hand Guard
Provides protection against
projecting branches and helps
prevent left hand from touching the
chain if it slips off the handle bar. It
also serves as the lever for chain
brake activitation.
17. Front Handle (Handlebar)
Handlebar for the left hand at the
front of the saw.
18. Spark Plug Boot
Connects the spark plug with the
ignition wire.
19. Starter Grip
The grip of the starter, for cranking
the engine.
20. Master Control Lever
Lever for choke control with
positions START, RUN and STOP.
21. Fuel Filler Cap
For closing the fuel tank.
22. Throttle Trigger
Controls the speed of the engine.
23. Throttle Trigger Interlock
Must de depressed before the
throttle trigger can be activated.
24. Rear Handle
The support handle for the right
hand, located at or toward the rear
of the saw.
25. 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 buffers designed to
reduce the transmission of
vibrations created by the engine
and cutting attachment to the
operator's hands (not illustrated).

Stihl MS 170 Specifications

General

Idle speed	- RPM
Chain pitch	3/8 \
Blade length	350 mm
Product color	Black, Orange, White
Automatic oiling	Yes
Oil tank capacity	0.145 L
Fuel tank capacity	0.25 L
Engine displacement	30.1 cm³
Engine power	1.7 hp
Power source	Gasoline

Weight and Dimensions

Weight	3900 g