Operating Instructions - Stihl MM 55 Instruction Manual

English
Insert the bolt (2) with the
N
washer (3) through the hole (4) in
the flange
Fit the washer (3) and tighten it
N
down with the nut (5)
Fasten the notched plate (6) to the
N
frame with the screws (7) in the
threaded holes – in the process,
push the notched plate toward the
handle
The wheels must fold down
N
automatically in working position; if
necessary, loosen the nut (5) by a
quarter turn
Additional weight is attached to the
MultiEngine
If additional weight (special accessory) –
see "Additional weight" – is already
attached to the MultiEngine, then
additional parts are required in order to
install wheels.
In this case, have the wheels installed by
a servicing dealer.
STIHL recommends that maintenance
and repair work be carried out only by
authorized STIHL dealers.
Folding the wheels in and out
The wheels can be locked in various
positions.
If the wheels are not needed during
work, fold in the wheels.
16
8
Loosen knob (8)
N
Engage knob in the desired working
N
position and tighten it

Operating Instructions

During break-in period
A factory-new machine should not be
run at high revs (full throttle off load) for
the first three tank fillings. This avoids
unnecessary high loads during the
break-in period. As all moving parts
have to bed in during the break-in
period, the frictional resistances in the
engine are greater during this period.
The engine develops its maximum
power after about 5 to 15 tank fillings.
During Operation
After a long period of full throttle
operation, allow the engine to run for a
short while at idle speed so that engine
heat can be dissipated by the flow of
cooling air. This protects engine-
mounted components (ignition,
carburetor) from thermal overload.
After Finishing Work
Storing for a short period: Wait for the
engine to cool down. Empty the fuel tank
and keep the machine in a dry place,
well away from sources of ignition, until
you need it again. For longer out-of-
service periods – see "Storing the
Machine".
MM 55, MM 55 C