Stihl FS 90 User Manual

48
English / USA
FS 90, FS 90 R
* see “Guide to Using this Manual”
1)
STIHL recommends that this work be done by a
a STIHL servicing dealer
Maintenance Chart
The following maintenance operations apply to normal operating conditions.
If working conditions are difficult (very dusty work area, etc.) or your daily working
time is longer than normal, shorten the specified intervals accordingly.
before starting work after finishing work or daily after each refueling stop weekly monthly yearly if problem if damaged if required
Complete machine
Visual inspection (condition, leaks)
XX
Clean
X
Control handle Check operation
XX
Air filter
Clean
XX
Replace
X
Pickup body in fuel tank
Have checked by servicing dealer
1)
X
Have replaced by servicing dealer
1)
XXX
Fuel tank Clean
XX
Carburetor
Check idle speed
XX
Readjust idle
X
Spark plug
Readjust electrode gap
X
Replace after 100 hours of operation
Cooling inlets
Inspect
X
Clean
X
Valve clearance
Check and adjust if necessary after first
139 hours of operation
1)
X
Combustion chamber
Decarbonize
after first 139 hours of operation, then
after every 150 hours of operation
X
Spark arresting screen in muffler*
Inspect
XX
Replace
XX
All accessible screws and nuts (not
adjusting screws)
Retighten
X

Stihl FS 90 Specifications

General

Engine Displacement	28.4 cc
Fuel Type	Gasoline
Handle Type	Loop handle
Shaft Type	Straight
Fuel Capacity	0.53 l
Weight	5.8 kg
Cutting Attachment	Autocut 25-2
Engine Power	0.95 kW (1.27 bhp)