Stihl MS 170 Servise Manual

© STIHL Inc., Virginia Beach, VA 2013 US/STR
confidential
13. Spark Plug Appearance
Heavy
carbon build-
up and oil
fouled
Mix ratio
incorrect.
Black, sooty
appearance
Caused by
rich fuel/air
mixture
Normal color,
normal electrode
wear due to high
run time
Normal color and
wear
Carbon buildup
due to high run
time
Both of these
plugs have served
their useful life
© STIHL Inc., Virginia Beach, VA 2013 US/STR
confidential
14. Muffler
 Remove the 2 muffler nuts and
deflector plate and inspect the
spark arrester screen
 It must be present for all hand
held engines used in the United
States
 The screen may be blocked
with carbon deposits
 If necessary shine a light
through the screen to verify
27

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