Stihl TS 420 Manual page 87

: Remove the E-clip (arrow).
1
: Pull off the ring (arrow) and the
sealing ring underneath.
– Pull the choke shaft out towards
the lever, unhooking and
relieving the torsion spring at the
same time.
2
1
– Examine the choke shaft (1),
ring (2), sealing ring (3) and
torsion spring (4), replace if
necessary.
– Note the installed position (arrow)
when installing the torsion spring.
86
– Clean the choke shaft and
guides, b 14.
– Reassemble parts in reverse
order.
2
: Push the choke shaft (1) into the
carburetor.
– Turn the leg of the torsion
spring (2) clockwise and fit it on
the throttle shaft (arrow).
1
4
: Fit the sealing ring (1) and
3
ring (2).
1
: Install the E-clip (1) and let go of
the choke shaft.
: Turn the choke shaft (1)
1
counterclockwise until the flat
side (arrow) faces the front.
The air valve shaft is now pre-
tensioned.
1
– Hold the choke shaft in this pre-
tensioned position.
: Slide the choke shutter (1) into
the hole in the carburetor. The
small hole (arrow) must be on the
left and the large hole (2) above
2
the choke shaft.
1
2
TS 410, TS 420