Stihl SP 451, Instruction Manual

Page: 22 / 32

SP 451, SP 481
English
20
Tensioning the Rewind Spring
N Make a loop in the unwound starter
rope and use it to turn the rope rotor
six full revolutions
counterclockwise.
N Hold the rotor steady.
N Pull out and straighten the twisted
rope.
N
Let go of the rotor.
N Release the rope slowly so that it
winds onto the rotor.
The starter grip must sit firmly in the rope
bushing. If the grip droops to one side:
Add one more turn on the rope rotor to
increase spring tension.
N
Take one turn of the rope off the
rotor.
N Fit the fan housing.
Replacing a Broken Rewind Spring
N Remove the rope rotor as described
in "Replacing the Starter Rope".
N
Take out the screws (7).
N Remove the spring housing and
pieces of spring.
N Lubricate the new, ready-to-fit
replacement spring in the new
spring housing with a few drops of
resin-free oil – see "Special
Accessories".
N Place the replacement spring with
spring housing in position – bottom
plate facing up.
If the spring pops out of the housing
during installation: Refit it clockwise,
starting outside and working inwards.
N
Fit the screws.
N
Refit the rope rotor as described in
"Replacing the Starter Rope".
N Tension the rewind spring.
N Fit the fan housing.
For periods of 3 months or longer
N Drain and clean the fuel tank in a
well ventilated area.
N Dispose of fuel properly in
accordance with local
environmental requirements.
N
Run the engine until the carburetor
is dry – this helps prevent the
carburetor diaphragms sticking
together.
N Thoroughly clean the machine –
pay special attention to the cylinder
fins and air filter.
N Store the machine in a dry, high or
locked location, – out of the reach of
children and other unauthorized
persons.
When the starter rope is fully
extended it must still be possible
to rotate the rotor another one and
a half turns. If this is not the case,
the spring is overtensioned and
could break.
427BA016 KN
The bits of the spring may still be
under tension and could fly apart
when you remove the rope rotor
and spring housing. To
reduce
the risk of injury , wear face
protection and work gloves.
7
7
271BA053 KN
Storing the Machine