Stiga MP2 554 Series Operator's Manual page 120

PROBLEM
6. Excessive noise and/or
vibration is experienced
whilst working
If problems persist after having performed the above operations, contact your dealer.
15. ATTACHMENTS ON REQUEST
15.1 "MULCHING" KIT
It chops the grass cuttings finely and leaves them
on the lawn, instead of collecting them in the grass
catcher (for compatible machines) (fig. 23).
PROBABLE CAUSE
Damaged or loose parts.
The pin on the cutting means
has slipped out of its seat.
Cutting means fittings are loose or
the cutting means is damaged
Stop the machine and disconnect
the spark plug cable (fig. 22).
Inspect for damage.
Check for and tighten any loose parts.
Have all checks, repair work and replacements
carried out by a specialized Centre only.
Turn off the engine and disconnect
the spark plug cap.
Contact an authorised Technical service centre
for checks, replacements or repairs (par. 8.1)
EN - 12
REMEDY