FS 90, FS 90 R
English
28
N Place the cutting attachment (6) on
the thrust plate (7).
N Fit the thrust washer (8) and rider
plate (9) on the shaft (10).
N Block the drive shaft.
N Use the combination wrench (12) to
screw the mounting nut (11) on to
the output shaft counterclockwise
and tighten it down firmly.
Removing the metal cutting
attachment
N Block the drive shaft.
N Unscrew the mounting nut
clockwise.
N Take the parts off the shaft – do not
remove the thrust plate (7).
The STIHL 4-MIX engine features
mixture lubrication and must be run on a
fuel mixture of gasoline and engine oil.
It operates otherwise on the 4-stroke
principle.
Collar (see arrow) must engage
the mowing head's mounting hole.
If the mounting nut turns too
freely, fit a new one.
4-MIX Engine
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