Operators Manual

TS 410, TS 420
English
32
N If the engine is down on power,
difficult to start or runs poorly at idle
speed, first check the spark plug.
N Fit a new spark plug after about 100
operating hours – or sooner if the
electrodes are badly eroded. Install
only suppressed spark plugs of the
type approved by STIHL – see
"Specifications".
Removing the spark plug
N Switch off the engine – move stop
switch to STOP or 0
N Unscrew screw (1) and remove
cap (2) – screw (1) is secured in the
cap (2) to prevent loss
N Remove the spark plug boot (3).
N Unscrew the spark plug (4).
Checking the Spark Plug
N Clean dirty spark plug.
N Check electrode gap (A) and
readjust if necessary – see
"Specifications".
N Rectify the problems which have
caused fouling of the spark plug.
Possible causes are:
– Too much oil in fuel mix.
– Dirty air filter.
– Unfavorable running conditions.
WARNING
Arcing may occur if the adapter nut (1) is
loose or missing. Working in an easily
combustible or explosive atmosphere
may cause a fire or an explosion. This
can result result in serious injuries or
damage to property.
N Use resistor type spark plugs with a
properly tightened adapter nut.
Installing the spark plug
N Fit the spark plug by hand and
screw it in
N Tighten spark plug with combination
wrench
N Press the spark plug boot firmly
onto the spark plug
N Position the cap for the spark plug
boot and screw it down
Spark Plug
1307BA030 KN
1
2
4
1307BA031 KN
3
000BA039 KN
A
1
000BA045 KN