TS 410, TS 420
English
30
Replacing the air filter
Only if there is a noticeable loss of 
engine power
N Choke lever to c
N Undo the screws(1).
N Remove the filter cover(2) and 
clean it
N Remove the main filter(3)
N Remove the auxiliary filter(4) – 
ensuring that dirt does not enter the 
intake area
N Clean the filter area
N insert new auxiliary filter and new 
main filter
N Refit the filter cover
N Tighten down the screws
Only high-quality air filters should be 
used, to protect the engine against 
ingress of abrasive dust.
STIHL recommends the use of genuine 
STIHL air filters. The high quality of 
these parts will ensure troublefree 
operation, a long service life for the 
engine and extremely long filter life.
Exhaust emissions are controlled by the 
design of the engine and components 
(e.g. carburation, ignition, timing and 
valve or port timing).