Stihl BT 131 Instruction Manual page 21

The following intervals apply for normal operating conditions. The specified intervals
must be shortened accordingly when working for longer than normal or under difficult
cutting conditions (extensive dust, etc.).
Combustion chamber
Spark arresting screen in muffler,
available in market-specific versions
All accessible screws, nuts and bolts (not
adjusting screws)
Anti-vibration elements
Gearbox lubrication
Drilling spindle
Drilling tool
Auger blade
Safety information label
1)
STIHL recommends STIHL dealers
2)
Only if there is a noticeable loss of engine power
BT 131
Have cleaned after every 150 hours of
1)
operation by dealer
check
Clean or replace
Tighten
check
1)
Have replaced by servicing dealer
check
top up
Clean
check
replace
check
Turn over or replace
replace
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