Stihl MS 311 User Manual - Page 69
Fuel System, Air Filter, Baffle, Filter Base
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12. Fuel System 12.1 Air Filter 12.2 Baffle Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult. The air filter should be checked when there is a noticeable loss of engine power. 1 - See also Troubleshooting, b 3.6, b 3.7 - Remove the shroud, b 6.4 - Remove the air filter, b 12.1 1 : Unscrew the nuts (arrows). 4903RA205 TG 2 1 : Pull the short circuit wire (1) out of the guides (arrows). - Pull the ring terminal off the pivot pin (2). 4903RA101 TG - Remove the baffle (1). 4903RA207 TG 2 : Lift the retaining tab (1) a little and remove the air filter (2). - Check the air filter and clean or replace if necessary - see instruction manual. - Reassemble in the reverse sequence. 4903RA204 TG - Reassemble in the reverse sequence. 1 12.3 Filter Base - Remove the air filter, b 12.1 - Remove the baffle, b 12.2 - Remove the choke rod, b 10.2.1 2 3 : Pull the filter base (1) out of rubber buffer (3) first and then rubber buffer (2). - Disconnect the ground wire from : Remove the filter base (1). the contact spring, b 7.7.4. 68 MS 311, MS 391