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2
MS 311, MS 391
Contents
12.
Fuel System
68
12.1
Air Filter
68
12.2
Baffle
68
12.3
Filter Base
68
12.4
Air Guide Shroud
69
12.5
Carburetor
71
12.5.1 Leakage Test
71
12.6
Servicing the
Carburetor
72
12.6.1 Metering Diaphragm 72
12.6.2 Inlet Needle
73
12.6.3 Pump Diaphragm
74
12.6.4 Air Valve
76
12.6.5 Levers on
Throttle Shaft
76
12.6.6 Adjusting Screws
77
12.7
Carburetor
Adjustment
79
12.7.1 Basic Setting
79
12.7.2 Standard Setting
80
12.8
Carburetor Carrier
81
12.9
Intake Manifold
82
12.10
Tank Vent
83
12.10.1 Testing
83
12.10.2 Removing and
Installing
84
12.11
Fuel Intake
84
12.11.1 Pickup Body
84
12.11.2 Fuel Hose
85
12.11.3 Fuel Suction Hose
86
12.11.4 Tank Housing
87
13.
Special Servicing
Tools
88
14.
Servicing Aids
90