Stihl MS 311 User Manual - Page 72
Carburetor, Installing, Leakage Test
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12.5 Carburetor - Remove the filter base, b 12.3 Installing - Open the fuel tank cap and drain the fuel tank. 2 - Collect the fuel in a clean container, b 1 Disconnect the fuel hose only when the tank cap is open. 1 : Check that the sleeve (1) and washer (2) are in place. 0001RA461 TG 1 1 : Push the fuel hose (1) back a little - the fuel hose is disconnected. 4903RA225 TG 1 : Shoulder (arrow) must fully engage the intake manifold (1). - Use STIHL press fluid to simplify assembly, b 14 - Install the filter base, b 12.3 - Install the air filter, b 12.1 - Check operation. - Reassemble all other parts in the reverse sequence. 0001RA359 TG 4903RA226 TG 1 : Remove the carburetor (1). - Install a new fuel hose, b 12.11.2 4903RA224 TG : Push the carburetor (1) into position. 12.5.1 Leakage Test In the case of problems with the carburetor or fuel supply system, also check and clean or replace the tank vent, b 12.10 The carburetor can be tested for leaks with the pump 0000 850 1300. - Remove the filter base, b 12.3 0001RA465 TG 1 : The fuel hose must be located in its seat (arrow). : When positioning the carburetor, make sure the stub (1) is pushed into the fuel hose. MS 311, MS 391 71