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BT 121
Tensioning the Rewind Spring
: Make a loop in the unwound
starter rope and use it to turn
the rope rotor six full revolutions
counterclockwise.
: Hold the rotor steady – pull out and
straighten the twisted rope.
: Release the rope rotor.
: Let go of rope slowly so that it winds
onto the rotor.
The starter grip must locate firmly in
the rope guide bush. If the grip
droops to one side: Add one more
turn on rope rotor to increase spring
tension.
When the starter rope is fully extended
it must still be possible to rotate the rotor
another 1 1/2 turns.
If this is not the case, the spring is
overtensioned and could break.
: Take one turn of rope off the rotor in
such a case.
: Fit the fan housing.
Replacing a Broken Rewind
Spring
: Remove the rope rotor as described
under "Replacing a Broken Starter
Rope”.
The bits of spring in the fan housing
might still be under tension and
could fly apart when you take them
out of the housing. To reduce risk of
injury, wear eye and face protection
and work gloves.
: Take out the screws (7).
: Remove the spring housing and
parts of spring.
: Lubricate replacement spring in
new spring housing with a few drops
of non-resinous oil – see "Special
Accessories".
Place the replacement spring with
housing in position – bottom plate must
face up. If the spring pops out of the
housing during installation: Refit it in the
clockwise direction, starting outside and
working inward.
: Fit the screws.
: Install the rope rotor as described
under “Replacing a Broken Starter
Rope”.
: Tension the rewind spring.
: Fit the fan housing.
7
7
250BA038 KN
25


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