Stihl HL 91 K Instruction Manual page 23

The following intervals apply to normal operating conditions only. If your daily work-
ing time is longer or operating conditions are difficult (very dusty work area, etc.),
shorten the specified intervals accordingly.
Exhaust port
All accessible screws and nuts (not adjust-
ing screws)
Antivibration elements
Cutting blades
Gearbox lubrication
Safety labels
1)
Only if there is a noticeable loss of engine power
2)
STIHL recommends an authorized STIHL servicing dealer.
3)
see chapter "Inspections and Maintenance by Dealer", section "Antivibration Elements"
4)
Spray with STIHL resin solvent after cleaning
5)
see chapter "Inspections and Maintenance by Dealer", section "Spacer"
HL 91 K
Have decoked by servicing dealer
2)
after first 139 hours of operation, then
every 150 hours of operation
Retighten
3)
Visual inspection
2)
Have replaced by servicing dealer
Visual inspection
4)
Clean
4)
Sharpen
Check
Replenish
Replace
X
X X
X
X
English
X
X
X X
X
X X
X
X
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