Stihl MS 181 User Manual

2 MS 171, MS 181, MS 211
Contents
14. Fuel System 72
14.1 Air Filter 72
14.2 Baffle / Filter Base 72
14.3 Removing and Installing
the Carburetor 73
14.3.1 Leakage Test 74
14.4 Servicing
the Carburetor 74
14.4.1 Metering Diaphragm 74
14.4.2 Inlet Needle 76
14.4.3 Fixed Jet 76
14.4.4 Valve Jet 77
14.4.5 Pump Diaphragm 77
14.4.6 Air Valve 79
14.4.7 Choke Shaft /
Choke Shutter 80
14.4.8 Throttle Shaft /
Throttle Shutter 82
14.4.9 Adjusting Screws 85
14.5 Adjusting
the Carburetor 86
14.5.1 Basic Setting 86
14.5.2 Standard Setting 87
14.6 Choke and
Throttle Rods 87
14.7 Removing and Installing
the Intake Manifold 89
14.7.1 Removing and Installing
the Carburetor Carrier 90
14.8 Tank Vent 92
14.8.1 Testing 92
14.8.2 Removing and
Installing 93
14.8.3 Manual Fuel Pump 93
14.9 Fuel Intake 94
14.9.1 Pickup Body 94
14.9.2 Fuel Intake Hoses 95
14.9.3 Fuel Hoses, Tank Vent /
Manual Fuel Pump 96
14.9.4 Fuel Tank Cap 97
15. Special Servicing
Tools 98
16. Servicing Aids 100
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Stihl MS 181 Specifications

General

Idle speed	- RPM
Motor type	2-stroke motor
Chain pitch	3/8 \
Blade length	400 mm
Product color	Black, Grey, Orange
Chain tensioner	Yes
Motor speed (max)	10000 RPM
Fuel tank capacity	0.266 L
Engine displacement	31.8 cm³
Power source	Gasoline
Sound power level	112 dB
Vibration emission	3.5 m/s²
Sound pressure level	100 dB

Weight and Dimensions

Weight	43004300 g