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Stihl MS 311 User Manual - Page 86

Fuel Hose

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4903RA164 TG 4903RA000 TG 1 1 1 2 4903RA060 TG 0001RA410 TG - Open the tank cap. - Remove the shroud, b 6.4 : Use hook 5910 893 8800 to remove the pickup body (1) from the fuel tank. Do not overstretch the fuel hose. : Pull off the pickup body (1). - Remove the air guide shroud, b 12.4 : Take out the screw (1). : Lower the tank housing (2). - Reassemble in the reverse sequence. 1 : Pull out the fuel hose (1) with connector. 1 12.11.2 Fuel Hose : Remove the fuel hose (1). 4903RA108 TG 1 : Slide the wooden assembly block (1) between the engine housing and tank housing. 1 4903RA243 TG : Take out the screws (arrows) and pry the AV spring (1) out of the handlebar. 2 : Pull the fuel hose (2) off the connector (1). 0001RA412 TG MS 311, MS 391 85

Section	Page
Contents	2
1. Introduction and Safety Precautions	4
1.1 Introduction	4
1.2 Safety Precautions	5
2. Specifications	6
2.1 Engine	6
2.2 Fuel System	6
2.3 Ignition System	6
2.4 Chain Lubrication	6
2.5 Tightening Torques	7
3. Troubleshooting	9
3.1 Clutch	9
3.2 Chain Drive, Chain Brake, Chain Tensioner	10
3.3 Chain Lubrication	11
3.4 Rewind Starter	12
3.5 Ignition System	13
3.6 Carburetor	14
3.7 Engine	17
4. Clutch	18
4.1 Clutch Drum	20
5. Chain Brake	21
5.1 Checking Operation	21
5.2 Brake Band	21
5.3 Brake Lever	23
5.4 Cam Lever	25
5.5 Pins	26
5.6 Chain Tensioner	26
5.7 Bar Mounting Studs	27
6. Engine	28
6.1 Muffler	28
6.2 Leakage Test	29
6.2.1 Preparations	29
6.2.2 Vacuum Test	30
6.2.3 Pressure Test	30
6.3 Oil Seals	31
6.4 Shroud	32
6.5 Cylinder / Crankshaft	33
6.6 Bearings / Crankshaft	36
6.7 Piston	37
6.8 Piston Rings	39
6.9 Decompression Valve	39
7. Ignition System	40
7.1 Ignition Timing	40
7.2 Preseparator	40
7.3 Ignition Module	40
7.4 Testing the Ignition Module	42
7.5 Spark Plug Boot / Ignition Lead	43
7.6 Flywheel	44
7.7 Short Circuit Wire	45
7.7.1 Testing	45
7.7.2 Removing and Installing	45
7.7.3 Ground Wire	47
7.7.4 Contact Spring	47
7.8 Ignition System Troubleshooting	49
8. Rewind Starter	52
8.1 General	52
8.2 Fan housing	52
8.2.1 Segment	52
8.3 Pawls	52
8.4 Rope Rotor	53
8.5 Starter Rope / Grip	54
8.6 Tensioning the Rewind Spring	55
8.7 Replacing the Rewind Spring	56
9. Servicing the AV System	58
9.1 Buffer on Oil Tank	58
9.2 AV Spring on Oil Tank	58
9.3 AV Spring on Fuel Tank	58
9.4 AV Spring on Front Handle	59
9.5 Stop Buffer at Clutch Side	60
9.6 Annular Buffer at Ignition Side	60
9.7 Handlebar	60
10. Control Levers	62
10.1 Master Control Lever	62
10.2 Throttle Trigger/Interlock Lever	62
10.2.1 Choke Rod	64
10.2.2 Throttle Rod	65
11. Chain Lubrication	66
11.1 Pickup Body	66
11.2 Oil Suction Hose	66
11.3 Oil Pump	67
11.4 Valve	68
12. Fuel System	69
12.1 Air Filter	69
12.2 Baffle	69
12.3 Filter Base	69
12.4 Air Guide Shroud	70
12.5 Carburetor	72
12.5.1 Leakage Test	72
12.6 Servicing the Carburetor	73
12.6.1 Metering Diaphragm	73
12.6.2 Inlet Needle	74
12.6.3 Pump Diaphragm	75
12.6.4 Air Valve	77
12.6.5 Levers on Throttle Shaft	77
12.6.6 Adjusting Screws	78
12.7 Carburetor Adjustment	80
12.7.1 Basic Setting	80
12.7.2 Standard Setting	81
12.8 Carburetor Carrier	82
12.9 Intake Manifold	83
12.10 Tank Vent	84
12.10.1 Testing	84
12.10.2 Removing and Installing	85
12.11 Fuel Intake	85
12.11.1 Pickup Body	85
12.11.2 Fuel Hose	86
12.11.3 Fuel Suction Hose	87
12.11.4 Tank Housing	88
13. Special Servicing Tools	89