Spark Arresting Screen In Muffler; Catalytic Converter; Spark Plug - Stihl MS 180 Instruction Manual

Spark Arresting Screen in
Muffler
In some countries the muffler is
equipped with a spark arresting screen.
N
If the engine is down on power,
check the spark arresting screen in
the muffler.
N Wait for the muffler to cool down.
1
1
3
4
N
Take out the screws (1) and remove
the cover (2).
N Remove the spark arresting screen
(3) from the muffler (4).
N Clean the spark arresting screen. If
the screen is damaged or heavily
carbonized, fit a new one.
N Refit the spark arresting screen –
place the cover in position and
secure it with the screws.
MS 170, MS 170 C, MS 180, MS 180 C

Catalytic Converter

Power tools with a catalytic converter
(depending on model) must be run on a
50 : 1 mixture of unleaded gasoline
and STIHL two-stroke engine oil or
equivalent two-stroke engine oil – see
chapter on "Fuel".
The catayltic converter integrated in the
muffler reduces the harmful emissions in
the exhaust gas.
The correct carburetor setting (if
adjustable) and strict observance of the
prescribed mix ratio of gasoline and two-
stroke engine oil are essential to
minimize harmful emissions and ensure
a long catalytic converter service life.
2

Spark Plug

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".
Remove the spark plug
N Simultaneously press the throttle
trigger lockout and throttle trigger
and set the Master Control lever to
cold start l
N Remove the shroud – see "Shroud"
N Pull off the spark plug boot
N Unscrew spark plug
English
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