Stihl FS 311, Instruction Manual, Page: 32 / 40

21 Maintenance and Care
The following intervals apply for normal operating
conditions. The specified intervals must be short‐
ened accordingly when working for longer than nor‐
mal or under difficult cutting conditions (extensive
dust, etc.).
Before starting work
At the end of work and/or daily
Whenever tank is refilled
Weekly
Monthly
Annually
If faulty
If damaged
As required
Complete machine Visual inspection (condi‐
tion, leaks)
X X
Clean X
Replace any damaged
parts
X X
Control handle Function test X X
Air filter Visual inspection X X
Replace
2)
X
Manual fuel pump (if
present)
check X
Have repaired by a spe‐
cialist dealer
1)
X
Fuel pickup body in fuel
tank
Have checked by
dealer
1)
X
Have replaced by serv‐
icing dealer
1)
X X X
Fuel tank Clean X X
Carburetor Check idle adjustment,
cutting attachment must
not turn
X X
Adjust idle speed X
Spark plug Set electrode gap X
Replace after every 100
hours of operation
Cooling air intakes Visual inspection X
Clean X
Cylinder fins Have cleaned by
dealer
1)
X
Valve clearance If power is low or crank‐
ing effort very high, have
valve clearance checked
and, if necessary, adjus‐
ted by dealer
1)
X X
Combustion chamber Have cleaned after
every 150 hours of oper‐
ation by dealer
1)
X
All accessible screws,
nuts and bolts (not
adjusting screws)
Tighten X
Anti-vibration elements check X X X
English 21 Maintenance and Care
32 0458-433-0121-B