Stihl TS 420 - Replacing the Rewind Spring

65TS 410, TS 420
The rewind spring is correctly
tensioned when the starter grip sits
firmly in the rope guide bushing
(arrow) without drooping to one
side. If this is not the case, the
spring must be tensioned by one
additional turn.
When the starter rope is fully
extended, it must still be possible to
rotate the rope rotor at least another
half turn before the maximum spring
tension is reached. If not, the spring
tension must be reduced, otherwise
it will break.
Reduce spring tension
– Pull out the starter rope and turn
the rope rotor with starter rope
back one turn.
– Pull the twisted rope out with the
starter grip and tidy it.
– Keep the starter rope tensioned
with the starter grip.
– Let go of the rope rotor and let the
starter rope rewind slowly.
– Install the starter cover, b 9.2.
– Tightening torques, b 3.5.
370RA241 TG
9.7 Replacing the rewind
spring
– Troubleshooting, b 4.3.
The replacement spring is supplied
ready for installation and secured in
a spring housing.
Wear a face shield and protective
gloves.
– Remove the starter cover, b 9.2.
– Relieve the rewind spring if
necessary and remove the rope
rotor, b 9.4.
: Pull the old spring housing (1) out
with assembly hook
5910 890 2800 and remove any
remaining scraps of spring.
: Examine the washer (1) and
clean or replace it if necessary.
– Before installation, coat the
rewind spring and washer with
a few drops of STIHL special
lubricant, b 14.
1
370RA242 TG
370RA243 TG
1
Ensure that the inner spring loop
can be seen through the hole
(arrow) so that it can subsequently
be aligned.
: Position the spring housing with
replacement spring: the raised
part on the outer spring loop
(arrow) must be over the mount
for the loop (1).
: Press the spring housing (1) as
far as possible into the mount on
the starter cover (2) until it
engages in the detent lugs
(arrows).
The rewind spring may pop out.
1
370RA244 TG
1
370RA245 TG
1
370RA246 TG
2