Maintenance And Care - Stihl BT 121 Instruction Manual

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Maintenance and Care

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.
Complete machine
Auger brake
Control handle
Air filter
Pickup body in fuel tank
Fuel tank
Carburetor
Spark plug
2)
Spark arrestor in muffler
All accessible screws and nuts (not adjust-
ing screws)
Antivibration elements
Gearbox
20
Visual inspection (condition, leaks)
Clean
Check operation
1)
Have serviced by dealer
Check operation
Clean
Replace
Check
Replace
Clean
Check idle adjustment – drilling spindle
must not rotate
Readjust idle
Readjust electrode gap
Replace after every 100 operating hours
1)
Have checked by dealer
Have cleaned or replaced by servicing
1)
dealer
Retighten
Check
1)
Have replaced by dealer
Re-lubricate
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BT 121
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